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57 lines
1 KiB
JavaScript
57 lines
1 KiB
JavaScript
import {
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Vector2
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} from '../../../build/three.module.js';
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/**
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* Normal map shader
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* - compute normals from heightmap
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*/
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var NormalMapShader = {
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uniforms: {
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'heightMap': { value: null },
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'resolution': { value: new Vector2( 512, 512 ) },
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'scale': { value: new Vector2( 1, 1 ) },
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'height': { value: 0.05 }
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},
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vertexShader: [
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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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].join( '\n' ),
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fragmentShader: [
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'uniform float height;',
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'uniform vec2 resolution;',
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'uniform sampler2D heightMap;',
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'varying vec2 vUv;',
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'void main() {',
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' float val = texture2D( heightMap, vUv ).x;',
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' float valU = texture2D( heightMap, vUv + vec2( 1.0 / resolution.x, 0.0 ) ).x;',
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' float valV = texture2D( heightMap, vUv + vec2( 0.0, 1.0 / resolution.y ) ).x;',
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' gl_FragColor = vec4( ( 0.5 * normalize( vec3( val - valU, val - valV, height ) ) + 0.5 ), 1.0 );',
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'}'
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].join( '\n' )
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};
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export { NormalMapShader };
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