ferroui-base 0.4.0

// @generated by scripts/generate_composition.py — do not edit

//! `SpotLight`.
//!
//! Defined by the FerroUI overlay (scripts/composition-schema-winui.xml).

use bitflags::bitflags;
use crate::Vector3D;
use crate::media::Color;
use crate::rendering::composition::ICompositionObject;
use crate::rendering::composition::animations::AnimationInstanceFactory;
use crate::rendering::composition::animations::ICompositionAnimation;
use crate::rendering::composition::expressions::ExpressionVariant;
use crate::rendering::composition::server::AsServerRenderResource;
use crate::rendering::composition::server::CompositionProperty;
use crate::rendering::composition::server::CompositionPropertyOf;
use crate::rendering::composition::server::IServerObject;
use crate::rendering::composition::server::ServerPropertyValue;
use crate::rendering::composition::server::ServerValueChange;
use crate::rendering::composition::server::props_of;
use crate::rendering::composition::server::read_server_object;
use crate::rendering::composition::transport::BatchStreamReader;
use crate::rendering::composition::transport::BatchStreamWriter;
use crate::rendering::composition::transport::BatchValue;
use crate::rendering::composition::transport::BatchValueReader;
use std::any::Any;
use std::any::TypeId;
use std::cell::Cell;
use std::cell::RefCell;
use std::rc::Rc;
use std::sync::OnceLock;
use std::time::Duration;
use super::CompositionLightHooks;
use super::CompositionLightProps;
use super::ServerCompositionLightHooks;
use super::ServerCompositionLightProps;

bitflags! {
    /// The fields of `SpotLight` that changed since its last serialization.
    #[derive(Clone, Copy, Debug, Default, PartialEq, Eq, Hash)]
    pub struct SpotLightChangedFields: u32 {
        const CONSTANT_ATTENUATION = 1;
        const CONSTANT_ATTENUATION_ANIMATED = 2;
        const LINEAR_ATTENUATION = 4;
        const LINEAR_ATTENUATION_ANIMATED = 8;
        const QUADRATIC_ATTENUATION = 16;
        const QUADRATIC_ATTENUATION_ANIMATED = 32;
        const COORDINATE_SPACE = 64;
        const DIRECTION = 128;
        const DIRECTION_ANIMATED = 256;
        const INNER_CONE_ANGLE = 512;
        const INNER_CONE_ANGLE_ANIMATED = 1024;
        const INNER_CONE_COLOR = 2048;
        const INNER_CONE_COLOR_ANIMATED = 4096;
        const INNER_CONE_INTENSITY = 8192;
        const INNER_CONE_INTENSITY_ANIMATED = 16384;
        const OUTER_CONE_ANGLE = 32768;
        const OUTER_CONE_ANGLE_ANIMATED = 65536;
        const OUTER_CONE_COLOR = 131072;
        const OUTER_CONE_COLOR_ANIMATED = 262144;
        const OUTER_CONE_INTENSITY = 524288;
        const OUTER_CONE_INTENSITY_ANIMATED = 1048576;
        const OFFSET = 2097152;
        const OFFSET_ANIMATED = 4194304;
        const MIN_ATTENUATION_CUTOFF = 8388608;
        const MIN_ATTENUATION_CUTOFF_ANIMATED = 16777216;
        const MAX_ATTENUATION_CUTOFF = 33554432;
        const MAX_ATTENUATION_CUTOFF_ANIMATED = 67108864;
    }
}

impl BatchValue for SpotLightChangedFields {
    #[inline]
    fn write_to(&self, out: &mut Vec<u8>) {
        self.bits().write_to(out);
    }

    #[inline]
    fn read_from(input: &mut BatchValueReader<'_>) -> Self {
        SpotLightChangedFields::from_bits_retain(u32::read_from(input))
    }
}

/// The partial methods of `SpotLight`: implemented by the class that embeds
/// [`SpotLightProps`]. Every hook defaults to doing nothing.
pub trait SpotLightHooks: CompositionLightHooks {
    fn initialize_defaults_extra(&self) {}

    fn validate_constant_attenuation_change(&self, _old_value: f32, _new_value: f32) {}
    fn on_constant_attenuation_changed(&self) {}
    fn on_constant_attenuation_changing(&self) {}

    fn validate_linear_attenuation_change(&self, _old_value: f32, _new_value: f32) {}
    fn on_linear_attenuation_changed(&self) {}
    fn on_linear_attenuation_changing(&self) {}

    fn validate_quadratic_attenuation_change(&self, _old_value: f32, _new_value: f32) {}
    fn on_quadratic_attenuation_changed(&self) {}
    fn on_quadratic_attenuation_changing(&self) {}

    fn validate_coordinate_space_change(&self, _old_value: &Option<Rc<dyn ICompositionObject>>, _new_value: &Option<Rc<dyn ICompositionObject>>) {}
    fn on_coordinate_space_changed(&self) {}
    fn on_coordinate_space_changing(&self) {}

    fn validate_direction_change(&self, _old_value: Vector3D, _new_value: Vector3D) {}
    fn on_direction_changed(&self) {}
    fn on_direction_changing(&self) {}

    fn validate_inner_cone_angle_change(&self, _old_value: f32, _new_value: f32) {}
    fn on_inner_cone_angle_changed(&self) {}
    fn on_inner_cone_angle_changing(&self) {}

    fn validate_inner_cone_color_change(&self, _old_value: Color, _new_value: Color) {}
    fn on_inner_cone_color_changed(&self) {}
    fn on_inner_cone_color_changing(&self) {}

    fn validate_inner_cone_intensity_change(&self, _old_value: f32, _new_value: f32) {}
    fn on_inner_cone_intensity_changed(&self) {}
    fn on_inner_cone_intensity_changing(&self) {}

    fn validate_outer_cone_angle_change(&self, _old_value: f32, _new_value: f32) {}
    fn on_outer_cone_angle_changed(&self) {}
    fn on_outer_cone_angle_changing(&self) {}

    fn validate_outer_cone_color_change(&self, _old_value: Color, _new_value: Color) {}
    fn on_outer_cone_color_changed(&self) {}
    fn on_outer_cone_color_changing(&self) {}

    fn validate_outer_cone_intensity_change(&self, _old_value: f32, _new_value: f32) {}
    fn on_outer_cone_intensity_changed(&self) {}
    fn on_outer_cone_intensity_changing(&self) {}

    fn validate_offset_change(&self, _old_value: Vector3D, _new_value: Vector3D) {}
    fn on_offset_changed(&self) {}
    fn on_offset_changing(&self) {}

    fn validate_min_attenuation_cutoff_change(&self, _old_value: f32, _new_value: f32) {}
    fn on_min_attenuation_cutoff_changed(&self) {}
    fn on_min_attenuation_cutoff_changing(&self) {}

    fn validate_max_attenuation_cutoff_change(&self, _old_value: f32, _new_value: f32) {}
    fn on_max_attenuation_cutoff_changed(&self) {}
    fn on_max_attenuation_cutoff_changing(&self) {}
}

/// The UI-thread properties of `SpotLight`.
pub struct SpotLightProps {
    base: CompositionLightProps,
    changed_fields_of_spot_light: Cell<SpotLightChangedFields>,
    constant_attenuation: Cell<f32>,
    linear_attenuation: Cell<f32>,
    quadratic_attenuation: Cell<f32>,
    coordinate_space: RefCell<Option<Rc<dyn ICompositionObject>>>,
    direction: Cell<Vector3D>,
    inner_cone_angle: Cell<f32>,
    inner_cone_color: Cell<Color>,
    inner_cone_intensity: Cell<f32>,
    outer_cone_angle: Cell<f32>,
    outer_cone_color: Cell<Color>,
    outer_cone_intensity: Cell<f32>,
    offset: Cell<Vector3D>,
    min_attenuation_cutoff: Cell<f32>,
    max_attenuation_cutoff: Cell<f32>,
}

impl Default for SpotLightProps {
    fn default() -> Self {
        Self::new()
    }
}

impl SpotLightProps {
    /// Creates the properties with every field at the default of its type.
    /// The defaults of the schema are applied by
    /// [`initialize_defaults`](Self::initialize_defaults).
    pub fn new() -> Self {
        Self {
            base: CompositionLightProps::new(),
            changed_fields_of_spot_light: Cell::new(SpotLightChangedFields::empty()),
            constant_attenuation: Cell::new(Default::default()),
            linear_attenuation: Cell::new(Default::default()),
            quadratic_attenuation: Cell::new(Default::default()),
            coordinate_space: RefCell::new(None),
            direction: Cell::new(Default::default()),
            inner_cone_angle: Cell::new(Default::default()),
            inner_cone_color: Cell::new(Default::default()),
            inner_cone_intensity: Cell::new(Default::default()),
            outer_cone_angle: Cell::new(Default::default()),
            outer_cone_color: Cell::new(Default::default()),
            outer_cone_intensity: Cell::new(Default::default()),
            offset: Cell::new(Default::default()),
            min_attenuation_cutoff: Cell::new(Default::default()),
            max_attenuation_cutoff: Cell::new(Default::default()),
        }
    }

    /// The properties of the base class.
    pub fn base(&self) -> &CompositionLightProps {
        &self.base
    }

    /// The `InitializeDefaults` calls of the constructor chain: the base
    /// classes first, then this class.
    pub fn initialize_defaults(&self, host: &dyn SpotLightHooks) {
        self.base.initialize_defaults(host);
        self.initialize_own_defaults(host);
    }

    /// `InitializeDefaults` of this class alone.
    pub fn initialize_own_defaults(&self, host: &dyn SpotLightHooks) {
        SpotLightHooks::initialize_defaults_extra(host);
        self.set_constant_attenuation(host, 1.0);
        self.set_direction(host, Vector3D::new(0.0, 0.0, -1.0));
        self.set_inner_cone_color(host, crate::media::Colors::WHITE);
        self.set_inner_cone_intensity(host, 1.0);
        self.set_outer_cone_angle(host, std::f32::consts::FRAC_PI_4);
        self.set_outer_cone_color(host, crate::media::Colors::WHITE);
        self.set_outer_cone_intensity(host, 1.0);
        self.set_max_attenuation_cutoff(host, f32::MAX);
    }

    /// `ConstantAttenuation` (animated, default `1.0`, FerroUI overlay).
    pub fn constant_attenuation(&self) -> f32 {
        self.constant_attenuation.get()
    }

    /// Sets `ConstantAttenuation` (animated, default `1.0`, FerroUI overlay).
    pub fn set_constant_attenuation(&self, host: &dyn SpotLightHooks, value: f32) {
        let mut changed = false;
        let old_value = self.constant_attenuation.get();
        if old_value.differs(&value) {
            SpotLightHooks::validate_constant_attenuation_change(host, old_value, value);
            SpotLightHooks::on_constant_attenuation_changing(host);
            changed = true;
            // Update the backing value
            self.constant_attenuation.set(value);
            // Register object for serialization in the next batch
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::CONSTANT_ATTENUATION);
            host.register_for_serialization();
            // Reset previous animation if any
            host.pending_animations().remove(ServerSpotLightProps::id_of_constant_attenuation_property().base());
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() & !SpotLightChangedFields::CONSTANT_ATTENUATION_ANIMATED);
            // Check for implicit animations
            if let Some(animation) = host.implicit_animation("ConstantAttenuation") {
                // Animation affects only current property
                if let Some(a) = animation.as_composition_animation() {
                    self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::CONSTANT_ATTENUATION_ANIMATED);
                    host.pending_animations().set(
                        ServerSpotLightProps::id_of_constant_attenuation_property().base(),
                        a.create_instance(host.server(), Some(ExpressionVariant::create(value))),
                    );
                }
                // Animation is triggered by the current field, but does not necessary affects it
                host.start_animation_group(&animation, "ConstantAttenuation", ExpressionVariant::create(value));
            }
        }
        self.constant_attenuation.set(value);
        if changed {
            SpotLightHooks::on_constant_attenuation_changed(host);
        }
    }

    /// `LinearAttenuation` (animated, FerroUI overlay).
    pub fn linear_attenuation(&self) -> f32 {
        self.linear_attenuation.get()
    }

    /// Sets `LinearAttenuation` (animated, FerroUI overlay).
    pub fn set_linear_attenuation(&self, host: &dyn SpotLightHooks, value: f32) {
        let mut changed = false;
        let old_value = self.linear_attenuation.get();
        if old_value.differs(&value) {
            SpotLightHooks::validate_linear_attenuation_change(host, old_value, value);
            SpotLightHooks::on_linear_attenuation_changing(host);
            changed = true;
            // Update the backing value
            self.linear_attenuation.set(value);
            // Register object for serialization in the next batch
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::LINEAR_ATTENUATION);
            host.register_for_serialization();
            // Reset previous animation if any
            host.pending_animations().remove(ServerSpotLightProps::id_of_linear_attenuation_property().base());
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() & !SpotLightChangedFields::LINEAR_ATTENUATION_ANIMATED);
            // Check for implicit animations
            if let Some(animation) = host.implicit_animation("LinearAttenuation") {
                // Animation affects only current property
                if let Some(a) = animation.as_composition_animation() {
                    self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::LINEAR_ATTENUATION_ANIMATED);
                    host.pending_animations().set(
                        ServerSpotLightProps::id_of_linear_attenuation_property().base(),
                        a.create_instance(host.server(), Some(ExpressionVariant::create(value))),
                    );
                }
                // Animation is triggered by the current field, but does not necessary affects it
                host.start_animation_group(&animation, "LinearAttenuation", ExpressionVariant::create(value));
            }
        }
        self.linear_attenuation.set(value);
        if changed {
            SpotLightHooks::on_linear_attenuation_changed(host);
        }
    }

    /// `QuadraticAttenuation` (animated, FerroUI overlay).
    pub fn quadratic_attenuation(&self) -> f32 {
        self.quadratic_attenuation.get()
    }

    /// Sets `QuadraticAttenuation` (animated, FerroUI overlay).
    pub fn set_quadratic_attenuation(&self, host: &dyn SpotLightHooks, value: f32) {
        let mut changed = false;
        let old_value = self.quadratic_attenuation.get();
        if old_value.differs(&value) {
            SpotLightHooks::validate_quadratic_attenuation_change(host, old_value, value);
            SpotLightHooks::on_quadratic_attenuation_changing(host);
            changed = true;
            // Update the backing value
            self.quadratic_attenuation.set(value);
            // Register object for serialization in the next batch
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::QUADRATIC_ATTENUATION);
            host.register_for_serialization();
            // Reset previous animation if any
            host.pending_animations().remove(ServerSpotLightProps::id_of_quadratic_attenuation_property().base());
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() & !SpotLightChangedFields::QUADRATIC_ATTENUATION_ANIMATED);
            // Check for implicit animations
            if let Some(animation) = host.implicit_animation("QuadraticAttenuation") {
                // Animation affects only current property
                if let Some(a) = animation.as_composition_animation() {
                    self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::QUADRATIC_ATTENUATION_ANIMATED);
                    host.pending_animations().set(
                        ServerSpotLightProps::id_of_quadratic_attenuation_property().base(),
                        a.create_instance(host.server(), Some(ExpressionVariant::create(value))),
                    );
                }
                // Animation is triggered by the current field, but does not necessary affects it
                host.start_animation_group(&animation, "QuadraticAttenuation", ExpressionVariant::create(value));
            }
        }
        self.quadratic_attenuation.set(value);
        if changed {
            SpotLightHooks::on_quadratic_attenuation_changed(host);
        }
    }

    /// `CoordinateSpace` (FerroUI overlay).
    pub fn coordinate_space(&self) -> Option<Rc<dyn ICompositionObject>> {
        self.coordinate_space.borrow().clone()
    }

    /// Sets `CoordinateSpace` (FerroUI overlay).
    pub fn set_coordinate_space(&self, host: &dyn SpotLightHooks, value: Option<Rc<dyn ICompositionObject>>) {
        let mut changed = false;
        let old_value = self.coordinate_space.borrow().clone();
        if old_value.differs(&value) {
            SpotLightHooks::validate_coordinate_space_change(host, &old_value, &value);
            SpotLightHooks::on_coordinate_space_changing(host);
            changed = true;
            // Update the backing value
            *self.coordinate_space.borrow_mut() = value.clone();
            // Register object for serialization in the next batch
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::COORDINATE_SPACE);
            host.register_for_serialization();
        }
        *self.coordinate_space.borrow_mut() = value;
        if changed {
            SpotLightHooks::on_coordinate_space_changed(host);
        }
    }

    /// `Direction` (animated, default `Vector3D::new(0.0, 0.0, -1.0)`, FerroUI overlay).
    pub fn direction(&self) -> Vector3D {
        self.direction.get()
    }

    /// Sets `Direction` (animated, default `Vector3D::new(0.0, 0.0, -1.0)`, FerroUI overlay).
    pub fn set_direction(&self, host: &dyn SpotLightHooks, value: Vector3D) {
        let mut changed = false;
        let old_value = self.direction.get();
        if old_value.differs(&value) {
            SpotLightHooks::validate_direction_change(host, old_value, value);
            SpotLightHooks::on_direction_changing(host);
            changed = true;
            // Update the backing value
            self.direction.set(value);
            // Register object for serialization in the next batch
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::DIRECTION);
            host.register_for_serialization();
            // Reset previous animation if any
            host.pending_animations().remove(ServerSpotLightProps::id_of_direction_property().base());
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() & !SpotLightChangedFields::DIRECTION_ANIMATED);
            // Check for implicit animations
            if let Some(animation) = host.implicit_animation("Direction") {
                // Animation affects only current property
                if let Some(a) = animation.as_composition_animation() {
                    self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::DIRECTION_ANIMATED);
                    host.pending_animations().set(
                        ServerSpotLightProps::id_of_direction_property().base(),
                        a.create_instance(host.server(), Some(ExpressionVariant::create(value))),
                    );
                }
                // Animation is triggered by the current field, but does not necessary affects it
                host.start_animation_group(&animation, "Direction", ExpressionVariant::create(value));
            }
        }
        self.direction.set(value);
        if changed {
            SpotLightHooks::on_direction_changed(host);
        }
    }

    /// `InnerConeAngle` (animated, FerroUI overlay).
    pub fn inner_cone_angle(&self) -> f32 {
        self.inner_cone_angle.get()
    }

    /// Sets `InnerConeAngle` (animated, FerroUI overlay).
    pub fn set_inner_cone_angle(&self, host: &dyn SpotLightHooks, value: f32) {
        let mut changed = false;
        let old_value = self.inner_cone_angle.get();
        if old_value.differs(&value) {
            SpotLightHooks::validate_inner_cone_angle_change(host, old_value, value);
            SpotLightHooks::on_inner_cone_angle_changing(host);
            changed = true;
            // Update the backing value
            self.inner_cone_angle.set(value);
            // Register object for serialization in the next batch
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::INNER_CONE_ANGLE);
            host.register_for_serialization();
            // Reset previous animation if any
            host.pending_animations().remove(ServerSpotLightProps::id_of_inner_cone_angle_property().base());
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() & !SpotLightChangedFields::INNER_CONE_ANGLE_ANIMATED);
            // Check for implicit animations
            if let Some(animation) = host.implicit_animation("InnerConeAngle") {
                // Animation affects only current property
                if let Some(a) = animation.as_composition_animation() {
                    self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::INNER_CONE_ANGLE_ANIMATED);
                    host.pending_animations().set(
                        ServerSpotLightProps::id_of_inner_cone_angle_property().base(),
                        a.create_instance(host.server(), Some(ExpressionVariant::create(value))),
                    );
                }
                // Animation is triggered by the current field, but does not necessary affects it
                host.start_animation_group(&animation, "InnerConeAngle", ExpressionVariant::create(value));
            }
        }
        self.inner_cone_angle.set(value);
        if changed {
            SpotLightHooks::on_inner_cone_angle_changed(host);
        }
    }

    /// `InnerConeColor` (animated, default `crate::media::Colors::WHITE`, FerroUI overlay).
    pub fn inner_cone_color(&self) -> Color {
        self.inner_cone_color.get()
    }

    /// Sets `InnerConeColor` (animated, default `crate::media::Colors::WHITE`, FerroUI overlay).
    pub fn set_inner_cone_color(&self, host: &dyn SpotLightHooks, value: Color) {
        let mut changed = false;
        let old_value = self.inner_cone_color.get();
        if old_value.differs(&value) {
            SpotLightHooks::validate_inner_cone_color_change(host, old_value, value);
            SpotLightHooks::on_inner_cone_color_changing(host);
            changed = true;
            // Update the backing value
            self.inner_cone_color.set(value);
            // Register object for serialization in the next batch
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::INNER_CONE_COLOR);
            host.register_for_serialization();
            // Reset previous animation if any
            host.pending_animations().remove(ServerSpotLightProps::id_of_inner_cone_color_property().base());
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() & !SpotLightChangedFields::INNER_CONE_COLOR_ANIMATED);
            // Check for implicit animations
            if let Some(animation) = host.implicit_animation("InnerConeColor") {
                // Animation affects only current property
                if let Some(a) = animation.as_composition_animation() {
                    self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::INNER_CONE_COLOR_ANIMATED);
                    host.pending_animations().set(
                        ServerSpotLightProps::id_of_inner_cone_color_property().base(),
                        a.create_instance(host.server(), Some(ExpressionVariant::create(value))),
                    );
                }
                // Animation is triggered by the current field, but does not necessary affects it
                host.start_animation_group(&animation, "InnerConeColor", ExpressionVariant::create(value));
            }
        }
        self.inner_cone_color.set(value);
        if changed {
            SpotLightHooks::on_inner_cone_color_changed(host);
        }
    }

    /// `InnerConeIntensity` (animated, default `1.0`, FerroUI overlay).
    pub fn inner_cone_intensity(&self) -> f32 {
        self.inner_cone_intensity.get()
    }

    /// Sets `InnerConeIntensity` (animated, default `1.0`, FerroUI overlay).
    pub fn set_inner_cone_intensity(&self, host: &dyn SpotLightHooks, value: f32) {
        let mut changed = false;
        let old_value = self.inner_cone_intensity.get();
        if old_value.differs(&value) {
            SpotLightHooks::validate_inner_cone_intensity_change(host, old_value, value);
            SpotLightHooks::on_inner_cone_intensity_changing(host);
            changed = true;
            // Update the backing value
            self.inner_cone_intensity.set(value);
            // Register object for serialization in the next batch
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::INNER_CONE_INTENSITY);
            host.register_for_serialization();
            // Reset previous animation if any
            host.pending_animations().remove(ServerSpotLightProps::id_of_inner_cone_intensity_property().base());
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() & !SpotLightChangedFields::INNER_CONE_INTENSITY_ANIMATED);
            // Check for implicit animations
            if let Some(animation) = host.implicit_animation("InnerConeIntensity") {
                // Animation affects only current property
                if let Some(a) = animation.as_composition_animation() {
                    self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::INNER_CONE_INTENSITY_ANIMATED);
                    host.pending_animations().set(
                        ServerSpotLightProps::id_of_inner_cone_intensity_property().base(),
                        a.create_instance(host.server(), Some(ExpressionVariant::create(value))),
                    );
                }
                // Animation is triggered by the current field, but does not necessary affects it
                host.start_animation_group(&animation, "InnerConeIntensity", ExpressionVariant::create(value));
            }
        }
        self.inner_cone_intensity.set(value);
        if changed {
            SpotLightHooks::on_inner_cone_intensity_changed(host);
        }
    }

    /// `OuterConeAngle` (animated, default `std::f32::consts::FRAC_PI_4`, FerroUI overlay).
    pub fn outer_cone_angle(&self) -> f32 {
        self.outer_cone_angle.get()
    }

    /// Sets `OuterConeAngle` (animated, default `std::f32::consts::FRAC_PI_4`, FerroUI overlay).
    pub fn set_outer_cone_angle(&self, host: &dyn SpotLightHooks, value: f32) {
        let mut changed = false;
        let old_value = self.outer_cone_angle.get();
        if old_value.differs(&value) {
            SpotLightHooks::validate_outer_cone_angle_change(host, old_value, value);
            SpotLightHooks::on_outer_cone_angle_changing(host);
            changed = true;
            // Update the backing value
            self.outer_cone_angle.set(value);
            // Register object for serialization in the next batch
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::OUTER_CONE_ANGLE);
            host.register_for_serialization();
            // Reset previous animation if any
            host.pending_animations().remove(ServerSpotLightProps::id_of_outer_cone_angle_property().base());
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() & !SpotLightChangedFields::OUTER_CONE_ANGLE_ANIMATED);
            // Check for implicit animations
            if let Some(animation) = host.implicit_animation("OuterConeAngle") {
                // Animation affects only current property
                if let Some(a) = animation.as_composition_animation() {
                    self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::OUTER_CONE_ANGLE_ANIMATED);
                    host.pending_animations().set(
                        ServerSpotLightProps::id_of_outer_cone_angle_property().base(),
                        a.create_instance(host.server(), Some(ExpressionVariant::create(value))),
                    );
                }
                // Animation is triggered by the current field, but does not necessary affects it
                host.start_animation_group(&animation, "OuterConeAngle", ExpressionVariant::create(value));
            }
        }
        self.outer_cone_angle.set(value);
        if changed {
            SpotLightHooks::on_outer_cone_angle_changed(host);
        }
    }

    /// `OuterConeColor` (animated, default `crate::media::Colors::WHITE`, FerroUI overlay).
    pub fn outer_cone_color(&self) -> Color {
        self.outer_cone_color.get()
    }

    /// Sets `OuterConeColor` (animated, default `crate::media::Colors::WHITE`, FerroUI overlay).
    pub fn set_outer_cone_color(&self, host: &dyn SpotLightHooks, value: Color) {
        let mut changed = false;
        let old_value = self.outer_cone_color.get();
        if old_value.differs(&value) {
            SpotLightHooks::validate_outer_cone_color_change(host, old_value, value);
            SpotLightHooks::on_outer_cone_color_changing(host);
            changed = true;
            // Update the backing value
            self.outer_cone_color.set(value);
            // Register object for serialization in the next batch
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::OUTER_CONE_COLOR);
            host.register_for_serialization();
            // Reset previous animation if any
            host.pending_animations().remove(ServerSpotLightProps::id_of_outer_cone_color_property().base());
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() & !SpotLightChangedFields::OUTER_CONE_COLOR_ANIMATED);
            // Check for implicit animations
            if let Some(animation) = host.implicit_animation("OuterConeColor") {
                // Animation affects only current property
                if let Some(a) = animation.as_composition_animation() {
                    self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::OUTER_CONE_COLOR_ANIMATED);
                    host.pending_animations().set(
                        ServerSpotLightProps::id_of_outer_cone_color_property().base(),
                        a.create_instance(host.server(), Some(ExpressionVariant::create(value))),
                    );
                }
                // Animation is triggered by the current field, but does not necessary affects it
                host.start_animation_group(&animation, "OuterConeColor", ExpressionVariant::create(value));
            }
        }
        self.outer_cone_color.set(value);
        if changed {
            SpotLightHooks::on_outer_cone_color_changed(host);
        }
    }

    /// `OuterConeIntensity` (animated, default `1.0`, FerroUI overlay).
    pub fn outer_cone_intensity(&self) -> f32 {
        self.outer_cone_intensity.get()
    }

    /// Sets `OuterConeIntensity` (animated, default `1.0`, FerroUI overlay).
    pub fn set_outer_cone_intensity(&self, host: &dyn SpotLightHooks, value: f32) {
        let mut changed = false;
        let old_value = self.outer_cone_intensity.get();
        if old_value.differs(&value) {
            SpotLightHooks::validate_outer_cone_intensity_change(host, old_value, value);
            SpotLightHooks::on_outer_cone_intensity_changing(host);
            changed = true;
            // Update the backing value
            self.outer_cone_intensity.set(value);
            // Register object for serialization in the next batch
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::OUTER_CONE_INTENSITY);
            host.register_for_serialization();
            // Reset previous animation if any
            host.pending_animations().remove(ServerSpotLightProps::id_of_outer_cone_intensity_property().base());
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() & !SpotLightChangedFields::OUTER_CONE_INTENSITY_ANIMATED);
            // Check for implicit animations
            if let Some(animation) = host.implicit_animation("OuterConeIntensity") {
                // Animation affects only current property
                if let Some(a) = animation.as_composition_animation() {
                    self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::OUTER_CONE_INTENSITY_ANIMATED);
                    host.pending_animations().set(
                        ServerSpotLightProps::id_of_outer_cone_intensity_property().base(),
                        a.create_instance(host.server(), Some(ExpressionVariant::create(value))),
                    );
                }
                // Animation is triggered by the current field, but does not necessary affects it
                host.start_animation_group(&animation, "OuterConeIntensity", ExpressionVariant::create(value));
            }
        }
        self.outer_cone_intensity.set(value);
        if changed {
            SpotLightHooks::on_outer_cone_intensity_changed(host);
        }
    }

    /// `Offset` (animated, FerroUI overlay).
    pub fn offset(&self) -> Vector3D {
        self.offset.get()
    }

    /// Sets `Offset` (animated, FerroUI overlay).
    pub fn set_offset(&self, host: &dyn SpotLightHooks, value: Vector3D) {
        let mut changed = false;
        let old_value = self.offset.get();
        if old_value.differs(&value) {
            SpotLightHooks::validate_offset_change(host, old_value, value);
            SpotLightHooks::on_offset_changing(host);
            changed = true;
            // Update the backing value
            self.offset.set(value);
            // Register object for serialization in the next batch
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::OFFSET);
            host.register_for_serialization();
            // Reset previous animation if any
            host.pending_animations().remove(ServerSpotLightProps::id_of_offset_property().base());
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() & !SpotLightChangedFields::OFFSET_ANIMATED);
            // Check for implicit animations
            if let Some(animation) = host.implicit_animation("Offset") {
                // Animation affects only current property
                if let Some(a) = animation.as_composition_animation() {
                    self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::OFFSET_ANIMATED);
                    host.pending_animations().set(
                        ServerSpotLightProps::id_of_offset_property().base(),
                        a.create_instance(host.server(), Some(ExpressionVariant::create(value))),
                    );
                }
                // Animation is triggered by the current field, but does not necessary affects it
                host.start_animation_group(&animation, "Offset", ExpressionVariant::create(value));
            }
        }
        self.offset.set(value);
        if changed {
            SpotLightHooks::on_offset_changed(host);
        }
    }

    /// `MinAttenuationCutoff` (animated, FerroUI overlay).
    pub fn min_attenuation_cutoff(&self) -> f32 {
        self.min_attenuation_cutoff.get()
    }

    /// Sets `MinAttenuationCutoff` (animated, FerroUI overlay).
    pub fn set_min_attenuation_cutoff(&self, host: &dyn SpotLightHooks, value: f32) {
        let mut changed = false;
        let old_value = self.min_attenuation_cutoff.get();
        if old_value.differs(&value) {
            SpotLightHooks::validate_min_attenuation_cutoff_change(host, old_value, value);
            SpotLightHooks::on_min_attenuation_cutoff_changing(host);
            changed = true;
            // Update the backing value
            self.min_attenuation_cutoff.set(value);
            // Register object for serialization in the next batch
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::MIN_ATTENUATION_CUTOFF);
            host.register_for_serialization();
            // Reset previous animation if any
            host.pending_animations().remove(ServerSpotLightProps::id_of_min_attenuation_cutoff_property().base());
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() & !SpotLightChangedFields::MIN_ATTENUATION_CUTOFF_ANIMATED);
            // Check for implicit animations
            if let Some(animation) = host.implicit_animation("MinAttenuationCutoff") {
                // Animation affects only current property
                if let Some(a) = animation.as_composition_animation() {
                    self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::MIN_ATTENUATION_CUTOFF_ANIMATED);
                    host.pending_animations().set(
                        ServerSpotLightProps::id_of_min_attenuation_cutoff_property().base(),
                        a.create_instance(host.server(), Some(ExpressionVariant::create(value))),
                    );
                }
                // Animation is triggered by the current field, but does not necessary affects it
                host.start_animation_group(&animation, "MinAttenuationCutoff", ExpressionVariant::create(value));
            }
        }
        self.min_attenuation_cutoff.set(value);
        if changed {
            SpotLightHooks::on_min_attenuation_cutoff_changed(host);
        }
    }

    /// `MaxAttenuationCutoff` (animated, default `f32::MAX`, FerroUI overlay).
    pub fn max_attenuation_cutoff(&self) -> f32 {
        self.max_attenuation_cutoff.get()
    }

    /// Sets `MaxAttenuationCutoff` (animated, default `f32::MAX`, FerroUI overlay).
    pub fn set_max_attenuation_cutoff(&self, host: &dyn SpotLightHooks, value: f32) {
        let mut changed = false;
        let old_value = self.max_attenuation_cutoff.get();
        if old_value.differs(&value) {
            SpotLightHooks::validate_max_attenuation_cutoff_change(host, old_value, value);
            SpotLightHooks::on_max_attenuation_cutoff_changing(host);
            changed = true;
            // Update the backing value
            self.max_attenuation_cutoff.set(value);
            // Register object for serialization in the next batch
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::MAX_ATTENUATION_CUTOFF);
            host.register_for_serialization();
            // Reset previous animation if any
            host.pending_animations().remove(ServerSpotLightProps::id_of_max_attenuation_cutoff_property().base());
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() & !SpotLightChangedFields::MAX_ATTENUATION_CUTOFF_ANIMATED);
            // Check for implicit animations
            if let Some(animation) = host.implicit_animation("MaxAttenuationCutoff") {
                // Animation affects only current property
                if let Some(a) = animation.as_composition_animation() {
                    self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::MAX_ATTENUATION_CUTOFF_ANIMATED);
                    host.pending_animations().set(
                        ServerSpotLightProps::id_of_max_attenuation_cutoff_property().base(),
                        a.create_instance(host.server(), Some(ExpressionVariant::create(value))),
                    );
                }
                // Animation is triggered by the current field, but does not necessary affects it
                host.start_animation_group(&animation, "MaxAttenuationCutoff", ExpressionVariant::create(value));
            }
        }
        self.max_attenuation_cutoff.set(value);
        if changed {
            SpotLightHooks::on_max_attenuation_cutoff_changed(host);
        }
    }

    /// Connects an animation with the named property. Returns `false` when
    /// neither this class nor its generated bases have an animated property
    /// of that name: the caller continues with its hand-written base.
    pub fn start_animation(
        &self,
        host: &dyn SpotLightHooks,
        property_name: &str,
        animation: &dyn ICompositionAnimation,
        final_value: Option<ExpressionVariant>,
    ) -> bool {
        if property_name == "ConstantAttenuation" {
            let server = animation.create_instance(host.server(), final_value);
            host.pending_animations().set(ServerSpotLightProps::id_of_constant_attenuation_property().base(), server);
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::CONSTANT_ATTENUATION_ANIMATED);
            host.register_for_serialization();
            return true;
        }
        if property_name == "LinearAttenuation" {
            let server = animation.create_instance(host.server(), final_value);
            host.pending_animations().set(ServerSpotLightProps::id_of_linear_attenuation_property().base(), server);
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::LINEAR_ATTENUATION_ANIMATED);
            host.register_for_serialization();
            return true;
        }
        if property_name == "QuadraticAttenuation" {
            let server = animation.create_instance(host.server(), final_value);
            host.pending_animations().set(ServerSpotLightProps::id_of_quadratic_attenuation_property().base(), server);
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::QUADRATIC_ATTENUATION_ANIMATED);
            host.register_for_serialization();
            return true;
        }
        if property_name == "Direction" {
            let server = animation.create_instance(host.server(), final_value);
            host.pending_animations().set(ServerSpotLightProps::id_of_direction_property().base(), server);
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::DIRECTION_ANIMATED);
            host.register_for_serialization();
            return true;
        }
        if property_name == "InnerConeAngle" {
            let server = animation.create_instance(host.server(), final_value);
            host.pending_animations().set(ServerSpotLightProps::id_of_inner_cone_angle_property().base(), server);
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::INNER_CONE_ANGLE_ANIMATED);
            host.register_for_serialization();
            return true;
        }
        if property_name == "InnerConeColor" {
            let server = animation.create_instance(host.server(), final_value);
            host.pending_animations().set(ServerSpotLightProps::id_of_inner_cone_color_property().base(), server);
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::INNER_CONE_COLOR_ANIMATED);
            host.register_for_serialization();
            return true;
        }
        if property_name == "InnerConeIntensity" {
            let server = animation.create_instance(host.server(), final_value);
            host.pending_animations().set(ServerSpotLightProps::id_of_inner_cone_intensity_property().base(), server);
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::INNER_CONE_INTENSITY_ANIMATED);
            host.register_for_serialization();
            return true;
        }
        if property_name == "OuterConeAngle" {
            let server = animation.create_instance(host.server(), final_value);
            host.pending_animations().set(ServerSpotLightProps::id_of_outer_cone_angle_property().base(), server);
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::OUTER_CONE_ANGLE_ANIMATED);
            host.register_for_serialization();
            return true;
        }
        if property_name == "OuterConeColor" {
            let server = animation.create_instance(host.server(), final_value);
            host.pending_animations().set(ServerSpotLightProps::id_of_outer_cone_color_property().base(), server);
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::OUTER_CONE_COLOR_ANIMATED);
            host.register_for_serialization();
            return true;
        }
        if property_name == "OuterConeIntensity" {
            let server = animation.create_instance(host.server(), final_value);
            host.pending_animations().set(ServerSpotLightProps::id_of_outer_cone_intensity_property().base(), server);
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::OUTER_CONE_INTENSITY_ANIMATED);
            host.register_for_serialization();
            return true;
        }
        if property_name == "Offset" {
            let server = animation.create_instance(host.server(), final_value);
            host.pending_animations().set(ServerSpotLightProps::id_of_offset_property().base(), server);
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::OFFSET_ANIMATED);
            host.register_for_serialization();
            return true;
        }
        if property_name == "MinAttenuationCutoff" {
            let server = animation.create_instance(host.server(), final_value);
            host.pending_animations().set(ServerSpotLightProps::id_of_min_attenuation_cutoff_property().base(), server);
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::MIN_ATTENUATION_CUTOFF_ANIMATED);
            host.register_for_serialization();
            return true;
        }
        if property_name == "MaxAttenuationCutoff" {
            let server = animation.create_instance(host.server(), final_value);
            host.pending_animations().set(ServerSpotLightProps::id_of_max_attenuation_cutoff_property().base(), server);
            self.changed_fields_of_spot_light.set(self.changed_fields_of_spot_light.get() | SpotLightChangedFields::MAX_ATTENUATION_CUTOFF_ANIMATED);
            host.register_for_serialization();
            return true;
        }
        false
    }

    /// Writes the changes of the object: the base class first, then the
    /// changed-fields mask and the changed members of this class.
    pub fn serialize_changes_core(&self, host: &dyn SpotLightHooks, writer: &mut BatchStreamWriter<'_>) {
        self.base.serialize_changes_core(host, writer);
        let changed = self.changed_fields_of_spot_light.get();
        writer.write(changed);
        if changed.contains(SpotLightChangedFields::CONSTANT_ATTENUATION_ANIMATED) {
            writer.write_value(host.pending_animations().get_and_remove(ServerSpotLightProps::id_of_constant_attenuation_property().base()));
        } else if changed.contains(SpotLightChangedFields::CONSTANT_ATTENUATION) {
            writer.write(self.constant_attenuation.get());
        }
        if changed.contains(SpotLightChangedFields::LINEAR_ATTENUATION_ANIMATED) {
            writer.write_value(host.pending_animations().get_and_remove(ServerSpotLightProps::id_of_linear_attenuation_property().base()));
        } else if changed.contains(SpotLightChangedFields::LINEAR_ATTENUATION) {
            writer.write(self.linear_attenuation.get());
        }
        if changed.contains(SpotLightChangedFields::QUADRATIC_ATTENUATION_ANIMATED) {
            writer.write_value(host.pending_animations().get_and_remove(ServerSpotLightProps::id_of_quadratic_attenuation_property().base()));
        } else if changed.contains(SpotLightChangedFields::QUADRATIC_ATTENUATION) {
            writer.write(self.quadratic_attenuation.get());
        }
        if changed.contains(SpotLightChangedFields::COORDINATE_SPACE) {
            writer.write_server_object(self.coordinate_space.borrow().clone().map(|o| o.server()));
        }
        if changed.contains(SpotLightChangedFields::DIRECTION_ANIMATED) {
            writer.write_value(host.pending_animations().get_and_remove(ServerSpotLightProps::id_of_direction_property().base()));
        } else if changed.contains(SpotLightChangedFields::DIRECTION) {
            writer.write(self.direction.get());
        }
        if changed.contains(SpotLightChangedFields::INNER_CONE_ANGLE_ANIMATED) {
            writer.write_value(host.pending_animations().get_and_remove(ServerSpotLightProps::id_of_inner_cone_angle_property().base()));
        } else if changed.contains(SpotLightChangedFields::INNER_CONE_ANGLE) {
            writer.write(self.inner_cone_angle.get());
        }
        if changed.contains(SpotLightChangedFields::INNER_CONE_COLOR_ANIMATED) {
            writer.write_value(host.pending_animations().get_and_remove(ServerSpotLightProps::id_of_inner_cone_color_property().base()));
        } else if changed.contains(SpotLightChangedFields::INNER_CONE_COLOR) {
            writer.write(self.inner_cone_color.get());
        }
        if changed.contains(SpotLightChangedFields::INNER_CONE_INTENSITY_ANIMATED) {
            writer.write_value(host.pending_animations().get_and_remove(ServerSpotLightProps::id_of_inner_cone_intensity_property().base()));
        } else if changed.contains(SpotLightChangedFields::INNER_CONE_INTENSITY) {
            writer.write(self.inner_cone_intensity.get());
        }
        if changed.contains(SpotLightChangedFields::OUTER_CONE_ANGLE_ANIMATED) {
            writer.write_value(host.pending_animations().get_and_remove(ServerSpotLightProps::id_of_outer_cone_angle_property().base()));
        } else if changed.contains(SpotLightChangedFields::OUTER_CONE_ANGLE) {
            writer.write(self.outer_cone_angle.get());
        }
        if changed.contains(SpotLightChangedFields::OUTER_CONE_COLOR_ANIMATED) {
            writer.write_value(host.pending_animations().get_and_remove(ServerSpotLightProps::id_of_outer_cone_color_property().base()));
        } else if changed.contains(SpotLightChangedFields::OUTER_CONE_COLOR) {
            writer.write(self.outer_cone_color.get());
        }
        if changed.contains(SpotLightChangedFields::OUTER_CONE_INTENSITY_ANIMATED) {
            writer.write_value(host.pending_animations().get_and_remove(ServerSpotLightProps::id_of_outer_cone_intensity_property().base()));
        } else if changed.contains(SpotLightChangedFields::OUTER_CONE_INTENSITY) {
            writer.write(self.outer_cone_intensity.get());
        }
        if changed.contains(SpotLightChangedFields::OFFSET_ANIMATED) {
            writer.write_value(host.pending_animations().get_and_remove(ServerSpotLightProps::id_of_offset_property().base()));
        } else if changed.contains(SpotLightChangedFields::OFFSET) {
            writer.write(self.offset.get());
        }
        if changed.contains(SpotLightChangedFields::MIN_ATTENUATION_CUTOFF_ANIMATED) {
            writer.write_value(host.pending_animations().get_and_remove(ServerSpotLightProps::id_of_min_attenuation_cutoff_property().base()));
        } else if changed.contains(SpotLightChangedFields::MIN_ATTENUATION_CUTOFF) {
            writer.write(self.min_attenuation_cutoff.get());
        }
        if changed.contains(SpotLightChangedFields::MAX_ATTENUATION_CUTOFF_ANIMATED) {
            writer.write_value(host.pending_animations().get_and_remove(ServerSpotLightProps::id_of_max_attenuation_cutoff_property().base()));
        } else if changed.contains(SpotLightChangedFields::MAX_ATTENUATION_CUTOFF) {
            writer.write(self.max_attenuation_cutoff.get());
        }
        self.changed_fields_of_spot_light.set(SpotLightChangedFields::empty());
    }
}

/// The partial methods of `ServerSpotLight`: implemented by the class that embeds
/// [`ServerSpotLightProps`]. Every hook defaults to doing nothing.
pub trait ServerSpotLightHooks: ServerCompositionLightHooks {
    fn deserialize_changes_extra(&self, _reader: &mut BatchStreamReader<'_>) {}
    fn on_fields_deserialized(&self, _changed: SpotLightChangedFields) {}

    fn on_coordinate_space_changed(&self) {}
    fn on_coordinate_space_changing(&self) {}
}

/// The server-side properties of `ServerSpotLight`.
pub struct ServerSpotLightProps {
    base: ServerCompositionLightProps,
    constant_attenuation: Cell<f32>,
    linear_attenuation: Cell<f32>,
    quadratic_attenuation: Cell<f32>,
    coordinate_space: RefCell<Option<Rc<dyn IServerObject>>>,
    direction: Cell<Vector3D>,
    inner_cone_angle: Cell<f32>,
    inner_cone_color: Cell<Color>,
    inner_cone_intensity: Cell<f32>,
    outer_cone_angle: Cell<f32>,
    outer_cone_color: Cell<Color>,
    outer_cone_intensity: Cell<f32>,
    offset: Cell<Vector3D>,
    min_attenuation_cutoff: Cell<f32>,
    max_attenuation_cutoff: Cell<f32>,
}

impl Default for ServerSpotLightProps {
    fn default() -> Self {
        Self::new()
    }
}

impl ServerSpotLightProps {
    /// Creates the properties with every field at the default of its type; the
    /// values of the UI thread arrive with the first batch.
    pub fn new() -> Self {
        Self {
            base: ServerCompositionLightProps::new(),
            constant_attenuation: Cell::new(Default::default()),
            linear_attenuation: Cell::new(Default::default()),
            quadratic_attenuation: Cell::new(Default::default()),
            coordinate_space: RefCell::new(None),
            direction: Cell::new(Default::default()),
            inner_cone_angle: Cell::new(Default::default()),
            inner_cone_color: Cell::new(Default::default()),
            inner_cone_intensity: Cell::new(Default::default()),
            outer_cone_angle: Cell::new(Default::default()),
            outer_cone_color: Cell::new(Default::default()),
            outer_cone_intensity: Cell::new(Default::default()),
            offset: Cell::new(Default::default()),
            min_attenuation_cutoff: Cell::new(Default::default()),
            max_attenuation_cutoff: Cell::new(Default::default()),
        }
    }

    /// The properties of the base class.
    pub fn base(&self) -> &ServerCompositionLightProps {
        &self.base
    }

    /// This block or the block of a base class, by type: what
    /// `IServerObject::get_props` of the embedding class returns.
    pub fn find_props(&self, type_id: TypeId) -> Option<&dyn Any> {
        if type_id == TypeId::of::<Self>() {
            return Some(self);
        }
        self.base.find_props(type_id)
    }

    /// The composition property of `ConstantAttenuation`.
    pub fn id_of_constant_attenuation_property() -> &'static CompositionPropertyOf<f32> {
        static PROPERTY: OnceLock<CompositionPropertyOf<f32>> = OnceLock::new();
        PROPERTY.get_or_init(|| {
            CompositionProperty::register::<ServerSpotLightProps, f32>(
                "ConstantAttenuation",
                "ServerSpotLight",
                |obj| props_of::<ServerSpotLightProps>(obj).constant_attenuation.get(),
                |obj, v| props_of::<ServerSpotLightProps>(obj).constant_attenuation.set(v),
                Some(|obj| ExpressionVariant::create(props_of::<ServerSpotLightProps>(obj).constant_attenuation.get())),
                Some(|obj, v: ExpressionVariant| props_of::<ServerSpotLightProps>(obj).constant_attenuation.set(v.cast_or_default::<f32>())),
            )
        })
    }

    /// `ConstantAttenuation` (animated).
    pub fn constant_attenuation(&self) -> f32 {
        self.constant_attenuation.get()
    }

    pub fn set_constant_attenuation(&self, host: &dyn ServerSpotLightHooks, value: f32) {
        self.constant_attenuation.set(value);
        host.remove_animation_for_property(Self::id_of_constant_attenuation_property().base());
    }

    /// The composition property of `LinearAttenuation`.
    pub fn id_of_linear_attenuation_property() -> &'static CompositionPropertyOf<f32> {
        static PROPERTY: OnceLock<CompositionPropertyOf<f32>> = OnceLock::new();
        PROPERTY.get_or_init(|| {
            CompositionProperty::register::<ServerSpotLightProps, f32>(
                "LinearAttenuation",
                "ServerSpotLight",
                |obj| props_of::<ServerSpotLightProps>(obj).linear_attenuation.get(),
                |obj, v| props_of::<ServerSpotLightProps>(obj).linear_attenuation.set(v),
                Some(|obj| ExpressionVariant::create(props_of::<ServerSpotLightProps>(obj).linear_attenuation.get())),
                Some(|obj, v: ExpressionVariant| props_of::<ServerSpotLightProps>(obj).linear_attenuation.set(v.cast_or_default::<f32>())),
            )
        })
    }

    /// `LinearAttenuation` (animated).
    pub fn linear_attenuation(&self) -> f32 {
        self.linear_attenuation.get()
    }

    pub fn set_linear_attenuation(&self, host: &dyn ServerSpotLightHooks, value: f32) {
        self.linear_attenuation.set(value);
        host.remove_animation_for_property(Self::id_of_linear_attenuation_property().base());
    }

    /// The composition property of `QuadraticAttenuation`.
    pub fn id_of_quadratic_attenuation_property() -> &'static CompositionPropertyOf<f32> {
        static PROPERTY: OnceLock<CompositionPropertyOf<f32>> = OnceLock::new();
        PROPERTY.get_or_init(|| {
            CompositionProperty::register::<ServerSpotLightProps, f32>(
                "QuadraticAttenuation",
                "ServerSpotLight",
                |obj| props_of::<ServerSpotLightProps>(obj).quadratic_attenuation.get(),
                |obj, v| props_of::<ServerSpotLightProps>(obj).quadratic_attenuation.set(v),
                Some(|obj| ExpressionVariant::create(props_of::<ServerSpotLightProps>(obj).quadratic_attenuation.get())),
                Some(|obj, v: ExpressionVariant| props_of::<ServerSpotLightProps>(obj).quadratic_attenuation.set(v.cast_or_default::<f32>())),
            )
        })
    }

    /// `QuadraticAttenuation` (animated).
    pub fn quadratic_attenuation(&self) -> f32 {
        self.quadratic_attenuation.get()
    }

    pub fn set_quadratic_attenuation(&self, host: &dyn ServerSpotLightHooks, value: f32) {
        self.quadratic_attenuation.set(value);
        host.remove_animation_for_property(Self::id_of_quadratic_attenuation_property().base());
    }

    /// The composition property of `CoordinateSpace`.
    pub fn id_of_coordinate_space_property() -> &'static CompositionPropertyOf<Option<Rc<dyn IServerObject>>> {
        static PROPERTY: OnceLock<CompositionPropertyOf<Option<Rc<dyn IServerObject>>>> = OnceLock::new();
        PROPERTY.get_or_init(|| {
            CompositionProperty::register::<ServerSpotLightProps, Option<Rc<dyn IServerObject>>>(
                "CoordinateSpace",
                "ServerSpotLight",
                |obj| props_of::<ServerSpotLightProps>(obj).coordinate_space.borrow().clone(),
                |obj, v| *props_of::<ServerSpotLightProps>(obj).coordinate_space.borrow_mut() = v,
                None,
                None,
            )
        })
    }

    /// `CoordinateSpace`.
    pub fn coordinate_space(&self) -> Option<Rc<dyn IServerObject>> {
        self.coordinate_space.borrow().clone()
    }

    pub fn set_coordinate_space(&self, host: &dyn ServerSpotLightHooks, value: Option<Rc<dyn IServerObject>>) {
        let old_value = self.coordinate_space.borrow().clone();
        let mut changed = false;
        if old_value.differs(&value) {
            ServerSpotLightHooks::on_coordinate_space_changing(host);
            changed = true;
        }
        host.set_value(
            Self::id_of_coordinate_space_property().base(),
            ServerValueChange {
                equal: old_value.default_equals(&value),
                old_resource: old_value.as_server_render_resource(),
                new_resource: value.as_server_render_resource(),
                assign: &mut || *self.coordinate_space.borrow_mut() = value.clone(),
            },
        );
        if changed {
            ServerSpotLightHooks::on_coordinate_space_changed(host);
        }
    }

    /// The composition property of `Direction`.
    pub fn id_of_direction_property() -> &'static CompositionPropertyOf<Vector3D> {
        static PROPERTY: OnceLock<CompositionPropertyOf<Vector3D>> = OnceLock::new();
        PROPERTY.get_or_init(|| {
            CompositionProperty::register::<ServerSpotLightProps, Vector3D>(
                "Direction",
                "ServerSpotLight",
                |obj| props_of::<ServerSpotLightProps>(obj).direction.get(),
                |obj, v| props_of::<ServerSpotLightProps>(obj).direction.set(v),
                Some(|obj| ExpressionVariant::create(props_of::<ServerSpotLightProps>(obj).direction.get())),
                Some(|obj, v: ExpressionVariant| props_of::<ServerSpotLightProps>(obj).direction.set(v.cast_or_default::<Vector3D>())),
            )
        })
    }

    /// `Direction` (animated).
    pub fn direction(&self) -> Vector3D {
        self.direction.get()
    }

    pub fn set_direction(&self, host: &dyn ServerSpotLightHooks, value: Vector3D) {
        self.direction.set(value);
        host.remove_animation_for_property(Self::id_of_direction_property().base());
    }

    /// The composition property of `InnerConeAngle`.
    pub fn id_of_inner_cone_angle_property() -> &'static CompositionPropertyOf<f32> {
        static PROPERTY: OnceLock<CompositionPropertyOf<f32>> = OnceLock::new();
        PROPERTY.get_or_init(|| {
            CompositionProperty::register::<ServerSpotLightProps, f32>(
                "InnerConeAngle",
                "ServerSpotLight",
                |obj| props_of::<ServerSpotLightProps>(obj).inner_cone_angle.get(),
                |obj, v| props_of::<ServerSpotLightProps>(obj).inner_cone_angle.set(v),
                Some(|obj| ExpressionVariant::create(props_of::<ServerSpotLightProps>(obj).inner_cone_angle.get())),
                Some(|obj, v: ExpressionVariant| props_of::<ServerSpotLightProps>(obj).inner_cone_angle.set(v.cast_or_default::<f32>())),
            )
        })
    }

    /// `InnerConeAngle` (animated).
    pub fn inner_cone_angle(&self) -> f32 {
        self.inner_cone_angle.get()
    }

    pub fn set_inner_cone_angle(&self, host: &dyn ServerSpotLightHooks, value: f32) {
        self.inner_cone_angle.set(value);
        host.remove_animation_for_property(Self::id_of_inner_cone_angle_property().base());
    }

    /// The composition property of `InnerConeColor`.
    pub fn id_of_inner_cone_color_property() -> &'static CompositionPropertyOf<Color> {
        static PROPERTY: OnceLock<CompositionPropertyOf<Color>> = OnceLock::new();
        PROPERTY.get_or_init(|| {
            CompositionProperty::register::<ServerSpotLightProps, Color>(
                "InnerConeColor",
                "ServerSpotLight",
                |obj| props_of::<ServerSpotLightProps>(obj).inner_cone_color.get(),
                |obj, v| props_of::<ServerSpotLightProps>(obj).inner_cone_color.set(v),
                Some(|obj| ExpressionVariant::create(props_of::<ServerSpotLightProps>(obj).inner_cone_color.get())),
                Some(|obj, v: ExpressionVariant| props_of::<ServerSpotLightProps>(obj).inner_cone_color.set(v.cast_or_default::<Color>())),
            )
        })
    }

    /// `InnerConeColor` (animated).
    pub fn inner_cone_color(&self) -> Color {
        self.inner_cone_color.get()
    }

    pub fn set_inner_cone_color(&self, host: &dyn ServerSpotLightHooks, value: Color) {
        self.inner_cone_color.set(value);
        host.remove_animation_for_property(Self::id_of_inner_cone_color_property().base());
    }

    /// The composition property of `InnerConeIntensity`.
    pub fn id_of_inner_cone_intensity_property() -> &'static CompositionPropertyOf<f32> {
        static PROPERTY: OnceLock<CompositionPropertyOf<f32>> = OnceLock::new();
        PROPERTY.get_or_init(|| {
            CompositionProperty::register::<ServerSpotLightProps, f32>(
                "InnerConeIntensity",
                "ServerSpotLight",
                |obj| props_of::<ServerSpotLightProps>(obj).inner_cone_intensity.get(),
                |obj, v| props_of::<ServerSpotLightProps>(obj).inner_cone_intensity.set(v),
                Some(|obj| ExpressionVariant::create(props_of::<ServerSpotLightProps>(obj).inner_cone_intensity.get())),
                Some(|obj, v: ExpressionVariant| props_of::<ServerSpotLightProps>(obj).inner_cone_intensity.set(v.cast_or_default::<f32>())),
            )
        })
    }

    /// `InnerConeIntensity` (animated).
    pub fn inner_cone_intensity(&self) -> f32 {
        self.inner_cone_intensity.get()
    }

    pub fn set_inner_cone_intensity(&self, host: &dyn ServerSpotLightHooks, value: f32) {
        self.inner_cone_intensity.set(value);
        host.remove_animation_for_property(Self::id_of_inner_cone_intensity_property().base());
    }

    /// The composition property of `OuterConeAngle`.
    pub fn id_of_outer_cone_angle_property() -> &'static CompositionPropertyOf<f32> {
        static PROPERTY: OnceLock<CompositionPropertyOf<f32>> = OnceLock::new();
        PROPERTY.get_or_init(|| {
            CompositionProperty::register::<ServerSpotLightProps, f32>(
                "OuterConeAngle",
                "ServerSpotLight",
                |obj| props_of::<ServerSpotLightProps>(obj).outer_cone_angle.get(),
                |obj, v| props_of::<ServerSpotLightProps>(obj).outer_cone_angle.set(v),
                Some(|obj| ExpressionVariant::create(props_of::<ServerSpotLightProps>(obj).outer_cone_angle.get())),
                Some(|obj, v: ExpressionVariant| props_of::<ServerSpotLightProps>(obj).outer_cone_angle.set(v.cast_or_default::<f32>())),
            )
        })
    }

    /// `OuterConeAngle` (animated).
    pub fn outer_cone_angle(&self) -> f32 {
        self.outer_cone_angle.get()
    }

    pub fn set_outer_cone_angle(&self, host: &dyn ServerSpotLightHooks, value: f32) {
        self.outer_cone_angle.set(value);
        host.remove_animation_for_property(Self::id_of_outer_cone_angle_property().base());
    }

    /// The composition property of `OuterConeColor`.
    pub fn id_of_outer_cone_color_property() -> &'static CompositionPropertyOf<Color> {
        static PROPERTY: OnceLock<CompositionPropertyOf<Color>> = OnceLock::new();
        PROPERTY.get_or_init(|| {
            CompositionProperty::register::<ServerSpotLightProps, Color>(
                "OuterConeColor",
                "ServerSpotLight",
                |obj| props_of::<ServerSpotLightProps>(obj).outer_cone_color.get(),
                |obj, v| props_of::<ServerSpotLightProps>(obj).outer_cone_color.set(v),
                Some(|obj| ExpressionVariant::create(props_of::<ServerSpotLightProps>(obj).outer_cone_color.get())),
                Some(|obj, v: ExpressionVariant| props_of::<ServerSpotLightProps>(obj).outer_cone_color.set(v.cast_or_default::<Color>())),
            )
        })
    }

    /// `OuterConeColor` (animated).
    pub fn outer_cone_color(&self) -> Color {
        self.outer_cone_color.get()
    }

    pub fn set_outer_cone_color(&self, host: &dyn ServerSpotLightHooks, value: Color) {
        self.outer_cone_color.set(value);
        host.remove_animation_for_property(Self::id_of_outer_cone_color_property().base());
    }

    /// The composition property of `OuterConeIntensity`.
    pub fn id_of_outer_cone_intensity_property() -> &'static CompositionPropertyOf<f32> {
        static PROPERTY: OnceLock<CompositionPropertyOf<f32>> = OnceLock::new();
        PROPERTY.get_or_init(|| {
            CompositionProperty::register::<ServerSpotLightProps, f32>(
                "OuterConeIntensity",
                "ServerSpotLight",
                |obj| props_of::<ServerSpotLightProps>(obj).outer_cone_intensity.get(),
                |obj, v| props_of::<ServerSpotLightProps>(obj).outer_cone_intensity.set(v),
                Some(|obj| ExpressionVariant::create(props_of::<ServerSpotLightProps>(obj).outer_cone_intensity.get())),
                Some(|obj, v: ExpressionVariant| props_of::<ServerSpotLightProps>(obj).outer_cone_intensity.set(v.cast_or_default::<f32>())),
            )
        })
    }

    /// `OuterConeIntensity` (animated).
    pub fn outer_cone_intensity(&self) -> f32 {
        self.outer_cone_intensity.get()
    }

    pub fn set_outer_cone_intensity(&self, host: &dyn ServerSpotLightHooks, value: f32) {
        self.outer_cone_intensity.set(value);
        host.remove_animation_for_property(Self::id_of_outer_cone_intensity_property().base());
    }

    /// The composition property of `Offset`.
    pub fn id_of_offset_property() -> &'static CompositionPropertyOf<Vector3D> {
        static PROPERTY: OnceLock<CompositionPropertyOf<Vector3D>> = OnceLock::new();
        PROPERTY.get_or_init(|| {
            CompositionProperty::register::<ServerSpotLightProps, Vector3D>(
                "Offset",
                "ServerSpotLight",
                |obj| props_of::<ServerSpotLightProps>(obj).offset.get(),
                |obj, v| props_of::<ServerSpotLightProps>(obj).offset.set(v),
                Some(|obj| ExpressionVariant::create(props_of::<ServerSpotLightProps>(obj).offset.get())),
                Some(|obj, v: ExpressionVariant| props_of::<ServerSpotLightProps>(obj).offset.set(v.cast_or_default::<Vector3D>())),
            )
        })
    }

    /// `Offset` (animated).
    pub fn offset(&self) -> Vector3D {
        self.offset.get()
    }

    pub fn set_offset(&self, host: &dyn ServerSpotLightHooks, value: Vector3D) {
        self.offset.set(value);
        host.remove_animation_for_property(Self::id_of_offset_property().base());
    }

    /// The composition property of `MinAttenuationCutoff`.
    pub fn id_of_min_attenuation_cutoff_property() -> &'static CompositionPropertyOf<f32> {
        static PROPERTY: OnceLock<CompositionPropertyOf<f32>> = OnceLock::new();
        PROPERTY.get_or_init(|| {
            CompositionProperty::register::<ServerSpotLightProps, f32>(
                "MinAttenuationCutoff",
                "ServerSpotLight",
                |obj| props_of::<ServerSpotLightProps>(obj).min_attenuation_cutoff.get(),
                |obj, v| props_of::<ServerSpotLightProps>(obj).min_attenuation_cutoff.set(v),
                Some(|obj| ExpressionVariant::create(props_of::<ServerSpotLightProps>(obj).min_attenuation_cutoff.get())),
                Some(|obj, v: ExpressionVariant| props_of::<ServerSpotLightProps>(obj).min_attenuation_cutoff.set(v.cast_or_default::<f32>())),
            )
        })
    }

    /// `MinAttenuationCutoff` (animated).
    pub fn min_attenuation_cutoff(&self) -> f32 {
        self.min_attenuation_cutoff.get()
    }

    pub fn set_min_attenuation_cutoff(&self, host: &dyn ServerSpotLightHooks, value: f32) {
        self.min_attenuation_cutoff.set(value);
        host.remove_animation_for_property(Self::id_of_min_attenuation_cutoff_property().base());
    }

    /// The composition property of `MaxAttenuationCutoff`.
    pub fn id_of_max_attenuation_cutoff_property() -> &'static CompositionPropertyOf<f32> {
        static PROPERTY: OnceLock<CompositionPropertyOf<f32>> = OnceLock::new();
        PROPERTY.get_or_init(|| {
            CompositionProperty::register::<ServerSpotLightProps, f32>(
                "MaxAttenuationCutoff",
                "ServerSpotLight",
                |obj| props_of::<ServerSpotLightProps>(obj).max_attenuation_cutoff.get(),
                |obj, v| props_of::<ServerSpotLightProps>(obj).max_attenuation_cutoff.set(v),
                Some(|obj| ExpressionVariant::create(props_of::<ServerSpotLightProps>(obj).max_attenuation_cutoff.get())),
                Some(|obj, v: ExpressionVariant| props_of::<ServerSpotLightProps>(obj).max_attenuation_cutoff.set(v.cast_or_default::<f32>())),
            )
        })
    }

    /// `MaxAttenuationCutoff` (animated).
    pub fn max_attenuation_cutoff(&self) -> f32 {
        self.max_attenuation_cutoff.get()
    }

    pub fn set_max_attenuation_cutoff(&self, host: &dyn ServerSpotLightHooks, value: f32) {
        self.max_attenuation_cutoff.set(value);
        host.remove_animation_for_property(Self::id_of_max_attenuation_cutoff_property().base());
    }

    /// Reads the changes of the object: the base class first, then the
    /// changed-fields mask and the changed members of this class.
    pub fn deserialize_changes_core(
        &self,
        host: &dyn ServerSpotLightHooks,
        reader: &mut BatchStreamReader<'_>,
        committed_at: Duration,
    ) {
        let compositor = host.server_compositor();
        self.base.deserialize_changes_core(host, reader, committed_at);
        ServerSpotLightHooks::deserialize_changes_extra(host, reader);
        let changed = reader.read::<SpotLightChangedFields>();
        if changed.contains(SpotLightChangedFields::CONSTANT_ATTENUATION_ANIMATED) {
            let Some(animation) = reader.read_value::<AnimationInstanceFactory>().map(AnimationInstanceFactory::create) else {
                panic!("a batch starts an animation of `ConstantAttenuation` without an animation instance");
            };
            host.set_animated_value(
                Self::id_of_constant_attenuation_property().base(),
                ExpressionVariant::create(self.constant_attenuation.get()),
                committed_at,
                animation,
            );
        } else if changed.contains(SpotLightChangedFields::CONSTANT_ATTENUATION) {
            let value = reader.read::<f32>();
            self.set_constant_attenuation(host, value);
        }
        if changed.contains(SpotLightChangedFields::LINEAR_ATTENUATION_ANIMATED) {
            let Some(animation) = reader.read_value::<AnimationInstanceFactory>().map(AnimationInstanceFactory::create) else {
                panic!("a batch starts an animation of `LinearAttenuation` without an animation instance");
            };
            host.set_animated_value(
                Self::id_of_linear_attenuation_property().base(),
                ExpressionVariant::create(self.linear_attenuation.get()),
                committed_at,
                animation,
            );
        } else if changed.contains(SpotLightChangedFields::LINEAR_ATTENUATION) {
            let value = reader.read::<f32>();
            self.set_linear_attenuation(host, value);
        }
        if changed.contains(SpotLightChangedFields::QUADRATIC_ATTENUATION_ANIMATED) {
            let Some(animation) = reader.read_value::<AnimationInstanceFactory>().map(AnimationInstanceFactory::create) else {
                panic!("a batch starts an animation of `QuadraticAttenuation` without an animation instance");
            };
            host.set_animated_value(
                Self::id_of_quadratic_attenuation_property().base(),
                ExpressionVariant::create(self.quadratic_attenuation.get()),
                committed_at,
                animation,
            );
        } else if changed.contains(SpotLightChangedFields::QUADRATIC_ATTENUATION) {
            let value = reader.read::<f32>();
            self.set_quadratic_attenuation(host, value);
        }
        if changed.contains(SpotLightChangedFields::COORDINATE_SPACE) {
            let value = read_server_object(reader, compositor.as_ref());
            self.set_coordinate_space(host, value);
        }
        if changed.contains(SpotLightChangedFields::DIRECTION_ANIMATED) {
            let Some(animation) = reader.read_value::<AnimationInstanceFactory>().map(AnimationInstanceFactory::create) else {
                panic!("a batch starts an animation of `Direction` without an animation instance");
            };
            host.set_animated_value(
                Self::id_of_direction_property().base(),
                ExpressionVariant::create(self.direction.get()),
                committed_at,
                animation,
            );
        } else if changed.contains(SpotLightChangedFields::DIRECTION) {
            let value = reader.read::<Vector3D>();
            self.set_direction(host, value);
        }
        if changed.contains(SpotLightChangedFields::INNER_CONE_ANGLE_ANIMATED) {
            let Some(animation) = reader.read_value::<AnimationInstanceFactory>().map(AnimationInstanceFactory::create) else {
                panic!("a batch starts an animation of `InnerConeAngle` without an animation instance");
            };
            host.set_animated_value(
                Self::id_of_inner_cone_angle_property().base(),
                ExpressionVariant::create(self.inner_cone_angle.get()),
                committed_at,
                animation,
            );
        } else if changed.contains(SpotLightChangedFields::INNER_CONE_ANGLE) {
            let value = reader.read::<f32>();
            self.set_inner_cone_angle(host, value);
        }
        if changed.contains(SpotLightChangedFields::INNER_CONE_COLOR_ANIMATED) {
            let Some(animation) = reader.read_value::<AnimationInstanceFactory>().map(AnimationInstanceFactory::create) else {
                panic!("a batch starts an animation of `InnerConeColor` without an animation instance");
            };
            host.set_animated_value(
                Self::id_of_inner_cone_color_property().base(),
                ExpressionVariant::create(self.inner_cone_color.get()),
                committed_at,
                animation,
            );
        } else if changed.contains(SpotLightChangedFields::INNER_CONE_COLOR) {
            let value = reader.read::<Color>();
            self.set_inner_cone_color(host, value);
        }
        if changed.contains(SpotLightChangedFields::INNER_CONE_INTENSITY_ANIMATED) {
            let Some(animation) = reader.read_value::<AnimationInstanceFactory>().map(AnimationInstanceFactory::create) else {
                panic!("a batch starts an animation of `InnerConeIntensity` without an animation instance");
            };
            host.set_animated_value(
                Self::id_of_inner_cone_intensity_property().base(),
                ExpressionVariant::create(self.inner_cone_intensity.get()),
                committed_at,
                animation,
            );
        } else if changed.contains(SpotLightChangedFields::INNER_CONE_INTENSITY) {
            let value = reader.read::<f32>();
            self.set_inner_cone_intensity(host, value);
        }
        if changed.contains(SpotLightChangedFields::OUTER_CONE_ANGLE_ANIMATED) {
            let Some(animation) = reader.read_value::<AnimationInstanceFactory>().map(AnimationInstanceFactory::create) else {
                panic!("a batch starts an animation of `OuterConeAngle` without an animation instance");
            };
            host.set_animated_value(
                Self::id_of_outer_cone_angle_property().base(),
                ExpressionVariant::create(self.outer_cone_angle.get()),
                committed_at,
                animation,
            );
        } else if changed.contains(SpotLightChangedFields::OUTER_CONE_ANGLE) {
            let value = reader.read::<f32>();
            self.set_outer_cone_angle(host, value);
        }
        if changed.contains(SpotLightChangedFields::OUTER_CONE_COLOR_ANIMATED) {
            let Some(animation) = reader.read_value::<AnimationInstanceFactory>().map(AnimationInstanceFactory::create) else {
                panic!("a batch starts an animation of `OuterConeColor` without an animation instance");
            };
            host.set_animated_value(
                Self::id_of_outer_cone_color_property().base(),
                ExpressionVariant::create(self.outer_cone_color.get()),
                committed_at,
                animation,
            );
        } else if changed.contains(SpotLightChangedFields::OUTER_CONE_COLOR) {
            let value = reader.read::<Color>();
            self.set_outer_cone_color(host, value);
        }
        if changed.contains(SpotLightChangedFields::OUTER_CONE_INTENSITY_ANIMATED) {
            let Some(animation) = reader.read_value::<AnimationInstanceFactory>().map(AnimationInstanceFactory::create) else {
                panic!("a batch starts an animation of `OuterConeIntensity` without an animation instance");
            };
            host.set_animated_value(
                Self::id_of_outer_cone_intensity_property().base(),
                ExpressionVariant::create(self.outer_cone_intensity.get()),
                committed_at,
                animation,
            );
        } else if changed.contains(SpotLightChangedFields::OUTER_CONE_INTENSITY) {
            let value = reader.read::<f32>();
            self.set_outer_cone_intensity(host, value);
        }
        if changed.contains(SpotLightChangedFields::OFFSET_ANIMATED) {
            let Some(animation) = reader.read_value::<AnimationInstanceFactory>().map(AnimationInstanceFactory::create) else {
                panic!("a batch starts an animation of `Offset` without an animation instance");
            };
            host.set_animated_value(
                Self::id_of_offset_property().base(),
                ExpressionVariant::create(self.offset.get()),
                committed_at,
                animation,
            );
        } else if changed.contains(SpotLightChangedFields::OFFSET) {
            let value = reader.read::<Vector3D>();
            self.set_offset(host, value);
        }
        if changed.contains(SpotLightChangedFields::MIN_ATTENUATION_CUTOFF_ANIMATED) {
            let Some(animation) = reader.read_value::<AnimationInstanceFactory>().map(AnimationInstanceFactory::create) else {
                panic!("a batch starts an animation of `MinAttenuationCutoff` without an animation instance");
            };
            host.set_animated_value(
                Self::id_of_min_attenuation_cutoff_property().base(),
                ExpressionVariant::create(self.min_attenuation_cutoff.get()),
                committed_at,
                animation,
            );
        } else if changed.contains(SpotLightChangedFields::MIN_ATTENUATION_CUTOFF) {
            let value = reader.read::<f32>();
            self.set_min_attenuation_cutoff(host, value);
        }
        if changed.contains(SpotLightChangedFields::MAX_ATTENUATION_CUTOFF_ANIMATED) {
            let Some(animation) = reader.read_value::<AnimationInstanceFactory>().map(AnimationInstanceFactory::create) else {
                panic!("a batch starts an animation of `MaxAttenuationCutoff` without an animation instance");
            };
            host.set_animated_value(
                Self::id_of_max_attenuation_cutoff_property().base(),
                ExpressionVariant::create(self.max_attenuation_cutoff.get()),
                committed_at,
                animation,
            );
        } else if changed.contains(SpotLightChangedFields::MAX_ATTENUATION_CUTOFF) {
            let value = reader.read::<f32>();
            self.set_max_attenuation_cutoff(host, value);
        }
        ServerSpotLightHooks::on_fields_deserialized(host, changed);
    }

    /// The composition property with the given name, among the properties
    /// of this class and of its generated bases that have a variant form.
    pub fn get_composition_property(name: &str) -> Option<&'static CompositionProperty> {
        if name == "ConstantAttenuation" {
            return Some(Self::id_of_constant_attenuation_property().base());
        }
        if name == "LinearAttenuation" {
            return Some(Self::id_of_linear_attenuation_property().base());
        }
        if name == "QuadraticAttenuation" {
            return Some(Self::id_of_quadratic_attenuation_property().base());
        }
        if name == "Direction" {
            return Some(Self::id_of_direction_property().base());
        }
        if name == "InnerConeAngle" {
            return Some(Self::id_of_inner_cone_angle_property().base());
        }
        if name == "InnerConeColor" {
            return Some(Self::id_of_inner_cone_color_property().base());
        }
        if name == "InnerConeIntensity" {
            return Some(Self::id_of_inner_cone_intensity_property().base());
        }
        if name == "OuterConeAngle" {
            return Some(Self::id_of_outer_cone_angle_property().base());
        }
        if name == "OuterConeColor" {
            return Some(Self::id_of_outer_cone_color_property().base());
        }
        if name == "OuterConeIntensity" {
            return Some(Self::id_of_outer_cone_intensity_property().base());
        }
        if name == "Offset" {
            return Some(Self::id_of_offset_property().base());
        }
        if name == "MinAttenuationCutoff" {
            return Some(Self::id_of_min_attenuation_cutoff_property().base());
        }
        if name == "MaxAttenuationCutoff" {
            return Some(Self::id_of_max_attenuation_cutoff_property().base());
        }
        ServerCompositionLightProps::get_composition_property(name)
    }
}