Sha256: 908067dafa75041ac278a45d096ef3f37cc507f185aaf72353eb0887a6ec2531

Contents?: true

Size: 442 Bytes

Versions: 12

Compression:

Stored size: 442 Bytes

Contents

/**
 * Computes the luminance of a color. 
 *
 * @name czm_luminance
 * @glslFunction
 *
 * @param {vec3} rgb The color.
 * 
 * @returns {float} The luminance.
 *
 * @example
 * float light = czm_luminance(vec3(0.0)); // 0.0
 * float dark = czm_luminance(vec3(1.0));  // ~1.0 
 */
float czm_luminance(vec3 rgb)
{
    // Algorithm from Chapter 10 of Graphics Shaders.
    const vec3 W = vec3(0.2125, 0.7154, 0.0721);
    return dot(rgb, W);
}

Version data entries

12 entries across 12 versions & 1 rubygems

Version Path
cesium-1.24.0 app/assets/javascripts/Cesium/Shaders/Builtin/Functions/luminance.glsl
cesium-1.23.0 app/assets/javascripts/Cesium/Shaders/Builtin/Functions/luminance.glsl
cesium-1.18.0 app/assets/javascripts/Cesium/Shaders/Builtin/Functions/luminance.glsl
cesium-1.17.0 app/assets/javascripts/Cesium/Shaders/Builtin/Functions/luminance.glsl
cesium-0.25.0 app/assets/javascripts/Shaders/Builtin/Functions/luminance.glsl
cesium-0.24.1 app/assets/javascripts/Shaders/Builtin/Functions/luminance.glsl
cesium-0.24.0 app/assets/javascripts/Shaders/Builtin/Functions/luminance.glsl
cesium-0.23.0 app/assets/javascripts/Shaders/Builtin/Functions/luminance.glsl
cesium-0.22.0 app/assets/javascripts/Shaders/Builtin/Functions/luminance.glsl
cesium-0.21.1 app/assets/javascripts/Shaders/Builtin/Functions/luminance.glsl
cesium-0.21 app/assets/javascripts/Shaders/Builtin/Functions/luminance.glsl
cesium-0.20.0 app/assets/javascripts/Shaders/Builtin/Functions/luminance.glsl