Assimp
v3.1.1 (June 2014)
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Describes a light source. More...
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float | getAngleInnerCone () |
Inner angle of a spot light's light cone. More... | |
float | getAngleOuterCone () |
Outer angle of a spot light's light cone. More... | |
float | getAttenuationConstant () |
Constant light attenuation factor. More... | |
float | getAttenuationLinear () |
Linear light attenuation factor. More... | |
float | getAttenuationQuadratic () |
Quadratic light attenuation factor. More... | |
String | getName () |
Returns the name of the light source. More... | |
AiLightType | getType () |
Returns The type of the light source. More... | |
Describes a light source.
Assimp supports multiple sorts of light sources, including directional, point and spot lights. All of them are defined with just a single structure and distinguished by their parameters. Note - some file formats (such as 3DS, ASE) export a "target point" - the point a spot light is looking at (it can even be animated). Assimp writes the target point as a subnode of a spotlights's main node, called "<spotName>.Target". However, this is just additional information then, the transformation tracks of the main node make the spot light already point in the right direction.
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Inner angle of a spot light's light cone.
The spot light has maximum influence on objects inside this angle. The angle is given in radians. It is 2PI for point lights and undefined for directional lights.
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Outer angle of a spot light's light cone.
The spot light does not affect objects outside this angle. The angle is given in radians. It is 2PI for point lights and undefined for directional lights. The outer angle must be greater than or equal to the inner angle. It is assumed that the application uses a smooth interpolation between the inner and the outer cone of the spot light.
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Constant light attenuation factor.
The intensity of the light source at a given distance 'd' from the light's position is Atten = 1/( att0 + att1 * d + att2 * d*d)
This member corresponds to the att0 variable in the equation. Naturally undefined for directional lights.
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Linear light attenuation factor.
The intensity of the light source at a given distance 'd' from the light's position is Atten = 1/( att0 + att1 * d + att2 * d*d)
This member corresponds to the att1 variable in the equation. Naturally undefined for directional lights.
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Quadratic light attenuation factor.
The intensity of the light source at a given distance 'd' from the light's position is Atten = 1/( att0 + att1 * d + att2 * d*d)
This member corresponds to the att2 variable in the equation. Naturally undefined for directional lights.
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Returns the name of the light source.
There must be a node in the scenegraph with the same name. This node specifies the position of the light in the scene hierarchy and can be animated.
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Returns The type of the light source.