Enum LightFalloff 

pub enum LightFalloff {
    Stops(Vec<LightStop>),
    Texture {
        slot: u32,
        half_extent: Vec2,
        offset: Vec2,
    },
}

How a light’s value varies over its footprint.

Variants

Stops(Vec<LightStop>)

A radial ramp over 0..=1 of the light’s radius, interpolated linearly between ascending stops (at strictly ascending, all in 0..=1). t below the first stop is the first colour, t above the last is the last colour. If the last stop is not zero the light still ends at the rim: fragments past radius are discarded.

Texture

A falloff texture (Godot PointLight2D.texture) sampled in light-local uv: the texture covers position + offset +- half_extent, rgb scales the light colour and a scales the ramp, and fragments outside the texture footprint are discarded. slot selects an upload queued on the pass (LightTextureUpload); a slot with no texture paints nothing.

Fields

slot: u32

half_extent: Vec2

offset: Vec2

Implementations

impl LightFalloff

pub fn stops(stops: impl Into<Vec<LightStop>>) -> Self

The deleted light2d.rs default ramp: white at the centre, half at 0.5, black at the rim.

pub fn half_extent(&self, radius: f32) -> Vec2

Footprint half extent in world units: radius for stops, the texture’s own half extent for a texture.

Trait Implementations

impl Clone for LightFalloff

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for LightFalloff

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for LightFalloff

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for LightFalloff

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for LightFalloff