runnable fragment
code snippet
uniform vec4 color;
uniform int maskShapeMode;
uniform float shapeWidth;
uniform float shapeHeight;
uniform vec2 center;
uniform int invertMask;
uniform int horizontalRepeat;
uniform int verticalRepeat;
precision mediump float;
/*{
"CATEGORIES": [
"Geometry"
],
"CREDIT": "by VIDVOX",