lightmap 0.5.0

Light map generator
Documentation 
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use nalgebra::Vector3;

/// Directional light is a light source with parallel rays. Example: Sun.
#[derive(Clone)]
pub struct DirectionalLightDefinition {
    /// Intensity is how bright light is. Default is 1.0.
    pub intensity: f32,
    /// Direction of light rays.
    pub direction: Vector3<f32>,
    /// Color of light.
    pub color: Vector3<f32>,
}

/// Spot light is a cone light source. Example: flashlight.
#[derive(Clone)]
pub struct SpotLightDefinition {
    /// Intensity is how bright light is. Default is 1.0.
    pub intensity: f32,
    /// Color of light.
    pub color: Vector3<f32>,
    /// Direction vector of light.
    pub direction: Vector3<f32>,
    /// Position of light in world coordinates.
    pub position: Vector3<f32>,
    /// Distance at which light intensity decays to zero.
    pub distance: f32,
    /// Square of distance.
    pub sqr_distance: f32,
    /// Smoothstep left bound. It is ((hotspot_cone_angle + falloff_angle_delta) * 0.5).cos()
    pub edge0: f32,
    /// Smoothstep right bound. It is (hotspot_cone_angle * 0.5).cos()
    pub edge1: f32,
}

/// Point light is a spherical light source. Example: light bulb.
#[derive(Clone)]
pub struct PointLightDefinition {
    /// Intensity is how bright light is. Default is 1.0.
    pub intensity: f32,
    /// Position of light in world coordinates.
    pub position: Vector3<f32>,
    /// Color of light.
    pub color: Vector3<f32>,
    /// Radius of sphere at which light intensity decays to zero.
    pub radius: f32,
    /// Square of radius.
    pub sqr_radius: f32,
}

/// Light definition for lightmap rendering.
#[derive(Clone)]
pub enum LightDefinition {
    Directional(DirectionalLightDefinition),
    Spot(SpotLightDefinition),
    Point(PointLightDefinition),
}