Color Palette

code:iq_color_cosine.glsl

// From IQ

// cosine based palette, 4 vec3 params

vec3 palette( in float t, in vec3 a, in vec3 b, in vec3 c, in vec3 d )

{

return a + b*cos( 6.28318*(c*t+d) );

}

https://scrapbox.io/files/655f2e9e44b6ec001cd089b1.png

code:simplified_color_cosine.glsl

// Simplified version of iq that generate basic rainbow

// Easy to tweak in livecoding situation by either hadcoding coefficient or adding new variable to slowly look like original iq code.

vec3 palette(float t){

return .5+.5*cos(6.28*(1.*t+vec3(.0,.3,.7)));

}

This website http://dev.thi.ng/gradients/ help to understand and generate a cosine #Color gradient generator

https://scrapbox.io/files/655f2e5a853895001b4d6907.png

Resource