Documentation

A light source. In addition to position information, each type of light source (except NoLight) has a color term, indicating the color of direct lighting, and an ambient term, indicating the color of indirect lighting.

Constructors

DirectionalLight	A directional or infinite light source, which always appears to be comming from the specified vector
Fields lightsource_direction :: Vector3D lightsource_color :: RGB lightsource_ambient :: RGB
PointLight	A point light, which has a specific position. The intensity of point light radiation falls off with the inverse square of distance, normalized to one at the specified radius. This means that point lights will be overbright inside that radius.
Fields lightsource_position :: Point3D lightsource_radius :: Distance lightsource_color :: RGB lightsource_ambient :: RGB
NoLight	An inactive light source, equivalent to any light source with a color and ambient term of rgb 0 0 0.

Instances

AffineTransformable LightSource

skylight :: Vector3D -> RGB -> LightSource Source

A DirectionalLight approximation of ambient sky radiation. Normally, set the vector to straight up, since that is the direction of the sky.

data MapLightSource Source

Encodes a transformation of a light source, including the light color and ambient color terms, and any affine transformation. The Monoid instance supports MapLightSource as a specialized endomorphism (see Endo).

Instances

Monoid MapLightSource
AffineTransformable MapLightSource

mapLight :: (RGB -> RGB) -> MapLightSource Source

Transformation of the direct illumination color of a light source.

mapAmbient :: (RGB -> RGB) -> MapLightSource Source

Transformation of the ambient color of a light source.

mapBoth :: (RGB -> RGB) -> MapLightSource Source

Transformation of both the direct illumination and the ambient color terms of a light source.

mapLightSource :: MapLightSource -> LightSource -> LightSource Source

Apply a MapLightSource to a LightSource.

isNoLight :: LightSource -> Bool Source

True if a light is NoLight.

infiniteLightSourceOf :: LightSource -> LightSource Source

Converts a PointLight to a DirectionalLight, assuming that the camera is at the origin.

setLightSourcesToOpenGL :: [LightSource] -> IO ()Source

Set OpenGL light sources starting from 0.

setLightSourceToOpenGL :: (Light, LightSource) -> IO ()Source

Set one specific OpenGL light source.