Punctual has no coherent noise, voronoi, kaleidoscope, or pointer primitive — these must be faked with available functions

Several visual effects that exist natively in Hydra or GLSL have no direct primitive in Punctual. There is no coherent noise function, no voronoi, no kaleidoscope, and no mouse/pointer uniform. Callers expecting these names will get parse errors. Each can be approximated: noise via osc, fract, or hash math; kaleidoscope via spin+tile in the polar coordinate system; voronoi via image or camera texture. Punctual does have native polar coordinates (fr, ft, xyrt, rtxy) which enable radial effects without a dedicated kaleid function.

Examples

Writing noise(4) in Punctual → parse error (unknown name). Approximation: fract(osc 4 * fr) for a similar spatial texture using polar coordinates.

Assessment

Name four primitives available in Hydra/GLSL but absent from Punctual, and describe one approach to approximate each within Punctual.