1_1_lerpTriple

Code 1.2, Figure 1.3:

1_1_lerpTriple.frag

#version 300 es precision highp float; out vec4 fragColor; uniform vec2 u_resolution; void main(){ vec2 pos = gl_FragCoord.xy / u_resolution.xy; vec3[3] col3 = vec3[]( vec3(1.0, 0.0, 0.0), vec3(0.0, 0.0, 1.0), vec3(0.0, 1.0, 0.0) ); pos.x *= 2.0; int ind = int(pos.x); vec3 col = mix(col3[ind], col3[ind + 1], fract(pos.x)); fragColor = vec4(col, 1.0); }

#version 300 es
precision highp float;
out vec4 fragColor;
uniform vec2 u_resolution;

void main(){
  vec2 pos = gl_FragCoord.xy / u_resolution.xy;
  vec3[3] col3 = vec3[](
    vec3(1.0, 0.0, 0.0),
    vec3(0.0, 0.0, 1.0),
    vec3(0.0, 1.0, 0.0)
  );
  pos.x *= 2.0;
  int ind = int(pos.x);
  vec3 col = mix(col3[ind], col3[ind + 1], fract(pos.x));
  fragColor = vec4(col, 1.0);
}