Shader test bench

DefocusBlur

gl-transitions transition glsl runnable transition MIT

runnable transition

GLSL transition function. Stronghold supplies two demo textures and progress/time uniforms.

Code

// Author: Sergey Kosarevsky
// License: MIT
// Ported from https://gist.github.com/corporateshark/b9f8e5675c647e615419

uniform float blurSize; // = 0.02

// 12-tap Poisson disk
// https://github.com/spite/Wagner/blob/master/fragment-shaders/poisson-disc-blur-fs.glsl

vec4 transition(vec2 uv) {
  float T = progress;
  float half_ = 0.5;
  float D = (T < half_) ? mix(0.0, blurSize, T / half_) : mix(blurSize, 0.0, (T - half_) / half_);
  vec4 C0 = getFromColor(uv);
  vec4 C1 = getToColor(uv);
  C0 += getFromColor(vec2(-0.326, -0.406) * D + uv);
  C1 += getToColor(vec2(-0.326, -0.406) * D + uv);
  C0 += getFromColor(vec2(-0.840, -0.074) * D + uv);
  C1 += getToColor(vec2(-0.840, -0.074) * D + uv);
  C0 += getFromColor(vec2(-0.696,  0.457) * D + uv);
  C1 += getToColor(vec2(-0.696,  0.457) * D + uv);
  C0 += getFromColor(vec2(-0.203,  0.621) * D + uv);
  C1 += getToColor(vec2(-0.203,  0.621) * D + uv);
  C0 += getFromColor(vec2( 0.962, -0.195) * D + uv);
  C1 += getToColor(vec2( 0.962, -0.195) * D + uv);
  C0 += getFromColor(vec2( 0.473, -0.480) * D + uv);
  C1 += getToColor(vec2( 0.473, -0.480) * D + uv);
  C0 += getFromColor(vec2( 0.519,  0.767) * D + uv);
  C1 += getToColor(vec2( 0.519,  0.767) * D + uv);
  C0 += getFromColor(vec2( 0.185, -0.893) * D + uv);
  C1 += getToColor(vec2( 0.185, -0.893) * D + uv);
  C0 += getFromColor(vec2( 0.507,  0.064) * D + uv);
  C1 += getToColor(vec2( 0.507,  0.064) * D + uv);
  C0 += getFromColor(vec2( 0.896,  0.412) * D + uv);
  C1 += getToColor(vec2( 0.896,  0.412) * D + uv);
  C0 += getFromColor(vec2(-0.322, -0.933) * D + uv);
  C1 += getToColor(vec2(-0.322, -0.933) * D + uv);
  C0 += getFromColor(vec2(-0.792, -0.598) * D + uv);
  C1 += getToColor(vec2(-0.792, -0.598) * D + uv);
  C0 /= 13.0;
  C1 /= 13.0;
  return mix(C0, C1, T);
}

Code

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