uniform sampler2D startImage;
uniform sampler2D endImage;
uniform float progress;
uniform float dots;
uniform vec2 center;
precision mediump float;
/*{
    "CATEGORIES": [
        "Wipe"
    ],
    "CREDIT": "Automatically converted from https://www.github.com/gl-transitions/gl-transitions/tree/master/PolkaDotsCurtain.glsl",
    "DESCRIPTION": "",
    "INPUTS": [
        {