Shader test bench

Wipe Down.fs

vidvox-isf-files utility glsl runnable fragment MIT

runnable fragment

Complete GLSL fragment shader. Stronghold runs it directly when the browser can compile it.

Code

uniform sampler2D startImage;
uniform sampler2D endImage;
uniform float progress;
precision mediump float;
/*
{
  "ISFVSN" : "2",
  "INPUTS" : [
    {
      "TYPE" : "image",
      "NAME" : "startImage"
    },
    {
      "TYPE" : "image",
      "NAME" : "endImage"
    },
    {
      "TYPE" : "float",
      "NAME" : "progress",
      "MIN" : 0,
      "MAX" : 1,
      "DEFAULT" : 0
    }
  ],
  "CATEGORIES" : [
    "Wipe"
  ],
  "CREDIT": "Automatically converted from https://www.github.com/gl-transitions/gl-transitions/tree/master/wipeDown.glsl",
  "DESCRIPTION" : "Automatically converted from https://gl-transitions.com/"
}
*/



vec4 getFromColor(vec2 inUV)	{
	return texture2D(startImage, inUV);
}
vec4 getToColor(vec2 inUV)	{
	return texture2D(endImage, inUV);
}



// Author: Jake Nelson
// License: MIT

vec4 transition(vec2 uv) {
  vec2 p=uv.xy/vec2(1.0).xy;
  vec4 a=getFromColor(p);
  vec4 b=getToColor(p);
  return mix(a, b, step(1.0-p.y,progress));
}



void main()	{
	gl_FragColor = transition((gl_FragCoord.xy / u_resolution.xy).xy);
}

Code

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