Struct Light 

pub struct Light { /* private fields */ }

A light source contributing illumination to a shaded point.

The fields have meanings that depend on LightType:

• For LightType::Directional, position is unused and direction is the unit vector pointing from the surface toward the light.
• For LightType::Point, position is the world position of the light and direction is unused.
• For LightType::Spot, both position and direction are meaningful and spot_cos carries cos(half_angle) of the spotlight cone.

Implementations

impl Light

Implements factory constructors and shading for Light, Material, and LightingUniforms.

pub fn new_directional(direction: Vector3D, color: Vector3D) -> Light

Creates a new directional light pointing in direction with color.

The direction is normalized internally; intensity defaults to 1.0. Falloff and spot half-angle are unused for directional lights.

Arguments

• Vector3D - The unit direction toward the light source.
• Vector3D - The RGB intensity multiplier.

Returns

• Light - The new directional light.

pub fn new_point(position: Vector3D, color: Vector3D, intensity: f64) -> Light

Creates a new point light at position with color and intensity.

Falloff defaults to 1.0 (inverse-square). The direction field is unused for point lights and is set to the zero vector.

Arguments

• Vector3D - The world-space position of the light.
• Vector3D - The RGB intensity multiplier.
• f64 - The intensity scalar.

Returns

• Light - The new point light.

pub fn new_spot( position: Vector3D, direction: Vector3D, color: Vector3D, intensity: f64, half_angle_rad: f64, ) -> Light

Creates a new spotlight at position shining in direction.

The cone is defined by half_angle_rad; the cosine of that angle is stored for fast cone-test comparisons during shading.

Arguments

• Vector3D - The world-space position of the light.
• Vector3D - The unit direction the cone opens along.
• Vector3D - The RGB intensity multiplier.
• f64 - The intensity scalar.
• f64 - The half-angle of the cone in radians.

Returns

• Light - The new spotlight.

impl Light

pub fn get_kind(&self) -> LightType

pub fn get_mut_kind(&mut self) -> &mut LightType

pub fn set_kind(&mut self, val: LightType) -> &mut Self

pub fn get_position(&self) -> Vector3D

pub fn get_mut_position(&mut self) -> &mut Vector3D

pub fn set_position(&mut self, val: Vector3D) -> &mut Self

pub fn get_direction(&self) -> Vector3D

pub fn get_mut_direction(&mut self) -> &mut Vector3D

pub fn set_direction(&mut self, val: Vector3D) -> &mut Self

pub fn get_color(&self) -> Vector3D

pub fn get_mut_color(&mut self) -> &mut Vector3D

pub fn set_color(&mut self, val: Vector3D) -> &mut Self

pub fn get_intensity(&self) -> f64

pub fn get_mut_intensity(&mut self) -> &mut f64

pub fn set_intensity(&mut self, val: f64) -> &mut Self

pub fn get_falloff(&self) -> f64

pub fn get_mut_falloff(&mut self) -> &mut f64

pub fn set_falloff(&mut self, val: f64) -> &mut Self

pub fn get_spot_cos(&self) -> f64

pub fn get_mut_spot_cos(&mut self) -> &mut f64

pub fn set_spot_cos(&mut self, val: f64) -> &mut Self

impl Light

pub fn new( kind: LightType, position: Vector3D, direction: Vector3D, color: Vector3D, intensity: f64, falloff: f64, spot_cos: f64, ) -> Self

Trait Implementations

impl Clone for Light

fn clone(&self) -> Light

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Light

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

Formats the value using the given formatter.

impl PartialEq for Light

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Light