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List of variables available to shader

On top of standard glsl functions, the following list of variables can be used in velocity shader:

  • float PI - 3.1415926535897932384626433832795
  • float frame - Current frame number. Increases over time. Resets to 0 if you change shader's code
  • vec4 cursor - Defines position of a cursor in bounding box coordinates. cursor.xy - position where mouse was clicked (or tapped) last time. cursor.zw - current mouse hover position. On mobile phones, where mouse is not available, zw component will be the xy of touchmove event.