three-stdlib/shaders/AfterimageShader.cjs

stand-alone library of threejs examples

"use strict";
Object.defineProperty(exports, Symbol.toStringTag, { value: "Module" });
const AfterimageShader = {
  uniforms: {
    damp: { value: 0.96 },
    tOld: { value: null },
    tNew: { value: null }
  },
  vertexShader: [
    "varying vec2 vUv;",
    "void main() {",
    "	vUv = uv;",
    "	gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",
    "}"
  ].join("\n"),
  fragmentShader: [
    "uniform float damp;",
    "uniform sampler2D tOld;",
    "uniform sampler2D tNew;",
    "varying vec2 vUv;",
    "vec4 when_gt( vec4 x, float y ) {",
    "	return max( sign( x - y ), 0.0 );",
    "}",
    "void main() {",
    "	vec4 texelOld = texture2D( tOld, vUv );",
    "	vec4 texelNew = texture2D( tNew, vUv );",
    "	texelOld *= damp * when_gt( texelOld, 0.1 );",
    "	gl_FragColor = max(texelNew, texelOld);",
    "}"
  ].join("\n")
};
exports.AfterimageShader = AfterimageShader;
//# sourceMappingURL=AfterimageShader.cjs.map