// glsl / C++ compatible source as interface for BloomThreshold#ifdef __cplusplus#   define BT_VEC2 glm::vec2#else#   define BT_VEC2 vec2#endif struct Parameters{    BT_VEC2 _deltaUV;    float _offset;    float _threshold;     // Bloom effect is calculated on a smaller framebuffer than main framebuffer.    // This value controls how much it is downsampled. For example _downsamplingFactor == 4 means that    // bloom framebuffer will be 4 times smaller and that for each pixel of the bloom framebuffer 16 pixels (4x4) of main    // framebuffer will be sampled.    int _downsamplingFactor;     float _padding[3];};     // <@if 1@>    // Trigger Scribe include     // <@endif@> <!def that !> //