VEDA issue (fast compilation time)

test_fast_compilation.frag

/*
{
server: 3000
}
*/

precision mediump float;

uniform float time;
uniform vec2 resolution;
uniform vec2 mouse;

vec2 m;

vec2 pos1 = vec2(.5, .5);
vec2 pos2 = vec2(.0);
vec2 pos3 = vec2(.1, 1.);

vec2 speed1 = vec2(.2, .34);
vec2 speed2 = vec2(-.2, .1);
vec2 speed3 = vec2(.1, .4);

// mirrors to -1..1
vec2 mirror(vec2 pos)
{
  vec2 mul = (abs(pos) - 1.) / 2.;
  vec2 reversed = step(1., mod(mul, 2.));  // 1.0 if reversed

  vec2 r = fract(mul);  // from 0 to 1
  r = r * 2. - 1.;
  r -= r * reversed * 2.;

  return r;
}

void main()
{
    m = mouse;

    vec2 uv = gl_FragCoord.xy / resolution - vec2(.5);
    uv.x *= resolution.x / resolution.y;
    uv *= 2.;

    vec3 color = vec3(.0);

    pos1 += speed1 * time;
    pos2 += speed2 * time;
    pos3 += speed3 * time;

    vec2 r1 = mirror(pos1);
    vec2 r2 = mirror(pos2);
    vec2 r3 = mirror(pos3);

    color.r = fract(length(r1 - uv)*3.);
    color.g = fract(length(r2 - uv)*3.);
    color.b = fract(length(r3 - uv)*3.);

    color *= step(abs(uv.x), 1.);

    gl_FragColor = vec4(color, 1.0);
}