haxiomic
/ curl-noise-time-varying-3d.glsl
Last active
September 28, 2023 00:43
Time-varying curl noise implementation, based on https://www.cs.ubc.ca/~rbridson/docs/bridson-siggraph2007-curlnoise.pdf
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| // https://www.shadertoy.com/view/dlfXDN | |
| // 2023 myth0genesis | |
| // 4D Simplex Noise Gradient | |
| // I saw that Stefan Gustavson didn't seem to have published any shader | |
| // with an analytic solution for the gradients of his variant | |
| // of 4D simplex noise, so I thought I'd try solving it myself | |
| // and publish it here for anyone who finds it useful. | |
| // Compares the analytic solution to the numerically approximated one (for a sanity check) | |
| // and shows the results of all four derivatives with respect to each dimension. | |
| // Top : Analytic gradient | Bottom: Forward differences approximated gradient |