Volume functions for shaders. More...

Volume sampling

These macros are used to retrieve volume channel values from within volume shaders.

Parameters

	_channel	Name of data channel in the volume node
	_interp	Volume interpolation quality, one of `AI_VOLUME_INTERP_*`
[out]	_val	Resulting sampled value at the shader globals position

Please refer to ai_shader_volume.h for a description of the volume sampling functions called by these macros.

AI_API AI_DEVICE bool AiVolumeSampleFltFunc (const AtString channel, const AtShaderGlobals *sg, int interp, float *value)

AI_API AI_DEVICE bool AiVolumeSampleRGBFunc (const AtString channel, const AtShaderGlobals *sg, int interp, AtRGB *value)

AI_API AI_DEVICE bool AiVolumeSampleRGBAFunc (const AtString channel, const AtShaderGlobals *sg, int interp, AtRGBA *value)

AI_API AI_DEVICE bool AiVolumeSampleVecFunc (const AtString channel, const AtShaderGlobals *sg, int interp, AtVector *value)

AI_API AI_DEVICE bool AiVolumeSampleVec2Func (const AtString channel, const AtShaderGlobals *sg, int interp, AtVector2 *value)

#define AiVolumeSampleFlt(_channel, _interp, _val) AiVolumeSampleFltFunc (_channel, sg, _interp, _val)

#define AiVolumeSampleRGB(_channel, _interp, _val) AiVolumeSampleRGBFunc (_channel, sg, _interp, _val)

#define AiVolumeSampleRGBA(_channel, _interp, _val) AiVolumeSampleRGBAFunc(_channel, sg, _interp, _val)

#define AiVolumeSampleVec(_channel, _interp, _val) AiVolumeSampleVecFunc (_channel, sg, _interp, _val)

#define AiVolumeSampleVec2(_channel, _interp, _val) AiVolumeSampleVec2Func(_channel, sg, _interp, _val)

Detailed Description

Volume functions for shaders.