Spaces:
Running
Running
File size: 995 Bytes
a28eca3 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 |
import {
Vector2
} from 'three';
/**
* Normal map shader
* - compute normals from heightmap
*/
const NormalMapShader = {
name: 'NormalMapShader',
uniforms: {
'heightMap': { value: null },
'resolution': { value: new Vector2( 512, 512 ) },
'scale': { value: new Vector2( 1, 1 ) },
'height': { value: 0.05 }
},
vertexShader: /* glsl */`
varying vec2 vUv;
void main() {
vUv = uv;
gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
}`,
fragmentShader: /* glsl */`
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 );
}`
};
export { NormalMapShader };
|