czm_RGBToXYZ
Converts an RGB color to CIE Yxy.
The conversion is described in Luminance Transform
Parameters:
| Name | Type | Description |
|---|---|---|
rgb |
vec3 | The color in RGB. |
Returns:
vec3
The color in CIE Yxy.
Example
vec3 xyz = czm_RGBToXYZ(rgb); xyz.x = max(xyz.x - luminanceThreshold, 0.0); rgb = czm_XYZToRGB(xyz);