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Im Hintergrund läuft eine Planetensimulation, geschrieben in JavaScript und Three.js.
Die zu sehenden Texturen stammen von:
https://www.solarsystemscope.com/textures/
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56 lines
875 B
56 lines
875 B
/** |
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* Afterimage shader |
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* I created this effect inspired by a demo on codepen: |
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* https://codepen.io/brunoimbrizi/pen/MoRJaN?page=1& |
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*/ |
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const AfterimageShader = { |
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uniforms: { |
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'damp': { value: 0.96 }, |
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'tOld': { value: null }, |
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'tNew': { value: null } |
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}, |
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vertexShader: /* glsl */` |
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varying vec2 vUv; |
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void main() { |
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vUv = uv; |
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gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 ); |
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}`, |
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fragmentShader: /* glsl */` |
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uniform float damp; |
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uniform sampler2D tOld; |
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uniform sampler2D tNew; |
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varying vec2 vUv; |
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vec4 when_gt( vec4 x, float y ) { |
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return max( sign( x - y ), 0.0 ); |
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} |
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void main() { |
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vec4 texelOld = texture2D( tOld, vUv ); |
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vec4 texelNew = texture2D( tNew, vUv ); |
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texelOld *= damp * when_gt( texelOld, 0.1 ); |
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gl_FragColor = max(texelNew, texelOld); |
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}` |
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}; |
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export { AfterimageShader };
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