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three

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JavaScript 3D library

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console.warn( "THREE.AfterimageShader: As part of the transition to ES6 Modules, the files in 'examples/js' were deprecated in May 2020 (r117) and will be deleted in December 2020 (r124). You can find more information about developing using ES6 Modules in https://threejs.org/docs/#manual/en/introduction/Installation." ); /** * Afterimage shader * I created this effect inspired by a demo on codepen: * https://codepen.io/brunoimbrizi/pen/MoRJaN?page=1& */ THREE.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" ) };