mirror of
https://github.com/Doodle3D/Doodle3D-Slicer.git
synced 2024-12-25 12:23:49 +01:00
54 lines
1.0 KiB
JavaScript
54 lines
1.0 KiB
JavaScript
|
/**
|
||
|
|
* @author alteredq / http://alteredqualia.com/
|
||
|
|
*
|
||
|
|
* Normal map shader
|
||
|
|
* - compute normals from heightmap
|
||
|
|
*/
|
||
|
|
|
||
|
|
THREE.NormalMapShader = {
|
||
|
|
|
||
|
|
uniforms: {
|
||
|
|
|
||
|
|
"heightMap": { type: "t", value: null },
|
||
|
|
"resolution": { type: "v2", value: new THREE.Vector2( 512, 512 ) },
|
||
|
|
"scale": { type: "v2", value: new THREE.Vector2( 1, 1 ) },
|
||
|
|
"height": { type: "f", value: 0.05 }
|
||
|
|
|
||
|
|
},
|
||
|
|
|
||
|
|
vertexShader: [
|
||
|
|
|
||
|
|
"varying vec2 vUv;",
|
||
|
|
|
||
|
|
"void main() {",
|
||
|
|
|
||
|
|
"vUv = uv;",
|
||
|
|
"gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",
|
||
|
|
|
||
|
|
"}"
|
||
|
|
|
||
|
|
].join("\n"),
|
||
|
|
|
||
|
|
fragmentShader: [
|
||
|
|
|
||
|
|
"uniform float height;",
|
||
|
|
"uniform vec2 resolution;",
|
||
|
|
"uniform sampler2D heightMap;",
|
||
|
|
|
||
|
|
"varying vec2 vUv;",
|
||
|
|
|
||
|
|
"void main() {",
|
||
|
|
|
||
|
|
"float val = texture2D( heightMap, vUv ).x;",
|
||
|
|
|
||
|
|
"float valU = texture2D( heightMap, vUv + vec2( 1.0 / resolution.x, 0.0 ) ).x;",
|
||
|
|
"float valV = texture2D( heightMap, vUv + vec2( 0.0, 1.0 / resolution.y ) ).x;",
|
||
|
|
|
||
|
|
"gl_FragColor = vec4( ( 0.5 * normalize( vec3( val - valU, val - valV, height ) ) + 0.5 ), 1.0 );",
|
||
|
|
|
||
|
|
"}"
|
||
|
|
|
||
|
|
].join("\n")
|
||
|
|
|
||
|
|
};
|