william-silversmith

/* springFactory
 *
 * Generate a physically realistic easing curve for a damped mass-spring system.
 *
 * Required:
 *   damping (zeta): [0, 1)
 *   halfcycles: 0...inf
 *
 * Optional:
 *   initial_position: -1..1, default 1

yiwenl

float contrast(float mValue, float mScale, float mMidPoint) {
	return clamp( (mValue - mMidPoint) * mScale + mMidPoint, 0.0, 1.0);
}

float contrast(float mValue, float mScale) {
	return contrast(mValue,  mScale, .5);
}

vec3 contrast(vec3 mValue, float mScale, float mMidPoint) {
	return vec3( contrast(mValue.r, mScale, mMidPoint), contrast(mValue.g, mScale, mMidPoint), contrast(mValue.b, mScale, mMidPoint) );

patriciogonzalezvivo

Please consider using http://lygia.xyz instead of copy/pasting this functions. It expand suport for voronoi, voronoise, fbm, noise, worley, noise, derivatives and much more, through simple file dependencies. Take a look to https://github.com/patriciogonzalezvivo/lygia/tree/main/generative

Generic 1,2,3 Noise

float rand(float n){return fract(sin(n) * 43758.5453123);}

float noise(float p){
	float fl = floor(p);
  float fc = fract(p);