Function ComputeDistanceSortKey

Source/Engine/Graphics/RenderTools.h:137–141

Computes the sorting key for depth value (quantized) Reference: http://aras-p.info/blog/2014/01/16/rough-sorting-by-depth/

    /// Reference: http://aras-p.info/blog/2014/01/16/rough-sorting-by-depth/
    /// </summary>
    FORCE_INLINE static uint32 ComputeDistanceSortKey(float distance)
    {
        const uint32 distanceI = *((uint32*)&distance);
        return ((uint32)(-(int32)(distanceI >> 31)) | 0x80000000) ^ distanceI;
    }

    // Calculates the update frequency and phrase for the given cached data (eg. cascaded shadow map or global sdf cascade contents). Lower data indices are updated first and more frequent.
    static void ComputeCascadeUpdateFrequency(int32 cascadeIndex, int32 cascadeCount, int32& updateFrequency, int32& updatePhrase, int32 updateMaxCountPerFrame = 1);