Struct Light 

pub struct Light {
    pub direction: Vec3,
    pub ambient: f32,
    pub shadows: bool,
    pub size: f32,
}

A light from one direction, with an even part that reaches every side.

Fields

direction: Vec3

The direction the light travels, in scene space.

ambient: f32

How bright a surface the light does not reach is, from 0 to 1: the side of a lit surface turned away from the light, and any surface in shadow.

shadows: bool

Whether the surfaces that cast shadows cast them on the scene’s surfaces.

size: f32

The angle the light spans as the scene sees it, in radians: 0 for a point far away, whose shadows have hard edges. A light of some size casts shadows that are sharp where a caster meets a surface and soft farther from it, as the sun’s 0.0093 does and a wide lamp’s more.

Implementations

impl Light

pub fn brightness(&self, normal: Vec3) -> f32

How bright a surface is, from ambient to 1, where its side that faces the viewer has normal: the light reaches only a side that faces it.

pub fn shadow_projection<'a>( &self, casters: impl IntoIterator<Item = &'a MeshSurface>, ) -> Option<Mat4>

The map from scene space to a shadow map of this light that holds casters: x and y from -1 to 1 across the map, and depth from 0 at the caster nearest the light to 1 at the farthest. A point farther along the light than a caster’s depth there lies in its shadow. None without casters, or for a light with no direction.

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 Copy for Light

impl Debug for Light

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

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