Shader program helping sources for shadow mapping.
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Shader program helping sources for shadow mapping.
◆ nkShadowMap()
float nkShadowMap (nkTexture2dShadow lightDepthMap, nkSamplerComparison s, nkFloat4 worldPosition, nkFloat4x4 lightViewProjectionMatrix, nkInt2 lightDepthMapDimensions) ;
Method computing if a pixel is within light or shadow, given a light depth map, where :
| Parameter | Description |
| lightDepthMap | Depth map of the light to be tested against. |
| s | Sampler to be used for sampling the light map. Usually using the COMPARISON_LESS comparison function. |
| worldPosition | The position in world coordinates of the pixel to evaluate for. |
| lightViewProjectionMatrix | The (projection * view) matrix for the camera that generated the depth map. |
| lightDepthMapDimensions | The lightDepthMap's dimensions (w x h). |
| Returns |
| If the pixel is detected as lit, 1.0. Otherwise, 0.0. |
In addition to these runtime parameters, compile time defines allow to customize the behaviour of the method :
| Define | Description |
| NK_SHADOW_MAP_METHOD_BIAS | Number allowing to overwrite the bias applied to the recomputed depth. Defaults to 0.0001. |
| NK_SHADOW_MAP_METHOD_DEBUG_OOB | If defined, then out of light depth's texture bounds will return 0. If defined, such cases will return 1. |
| NK_SHADOW_MAP_METHOD_PCF_4_TAP | If defined, percentage closer filtering will be enabled with 4 taps. |
| NK_SHADOW_MAP_METHOD_PCF_9_TAP | If defined, percentage closer filtering will be enabled with 9 taps. |
| NK_SHADOW_MAP_METHOD_PCF_16_TAP | If defined, percentage closer filtering will be enabled with 16 taps. |
- Returns
- The source for the method described.
The documentation for this class was generated from the following file:
- Documentation/Headers/NilkinsAstraeus/Graphics/ShaderLibs/ShadowMapping/ShadowMappingLib.h
