lygia/math/nyquist)A simple low-pass filter which attenuates high-frequencies.
Use:
nyquist(<float> value, <float> width, <float> strength)
#ifndef FNC_NYQUIST
#define FNC_NYQUIST
#ifndef NYQUIST_FILTER_CENTER
#define NYQUIST_FILTER_CENTER 0.5
#endif
#ifndef NYQUIST_FILTER_WIDTH
#define NYQUIST_FILTER_WIDTH 0.25
#endif
float nyquist(float x, float width){
float cutoffStart = NYQUIST_FILTER_CENTER - NYQUIST_FILTER_WIDTH;
float cutoffEnd = NYQUIST_FILTER_CENTER + NYQUIST_FILTER_WIDTH;
float f = smoothstep(cutoffEnd, cutoffStart, width);
return mix(0.5, x, f);
}
#endif
Use:
nyquist(<float> value, <float> width, <float> strength)
#ifndef FNC_NYQUIST
#define FNC_NYQUIST
#ifndef NYQUIST_FILTER_CENTER
#define NYQUIST_FILTER_CENTER 0.5
#endif
#ifndef NYQUIST_FILTER_WIDTH
#define NYQUIST_FILTER_WIDTH 0.25
#endif
float nyquist(float x, float width){
float cutoffStart = NYQUIST_FILTER_CENTER - NYQUIST_FILTER_WIDTH;
float cutoffEnd = NYQUIST_FILTER_CENTER + NYQUIST_FILTER_WIDTH;
float f = smoothstep(cutoffEnd, cutoffStart, width);
return lerp(0.5, x, f);
}
#endif
MIT License (MIT) Copyright (c) 2024 Shadi EL Hajj
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