You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
56 lines
1017 B
56 lines
1017 B
2 years ago
|
( function () {
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Normal map shader
|
||
|
|
* - compute normals from heightmap
|
||
|
|
*/
|
||
|
|
|
||
|
|
const NormalMapShader = {
|
||
|
|
uniforms: {
|
||
|
|
'heightMap': {
|
||
|
|
value: null
|
||
|
|
},
|
||
|
|
'resolution': {
|
||
|
|
value: new THREE.Vector2( 512, 512 )
|
||
|
|
},
|
||
|
|
'scale': {
|
||
|
|
value: new THREE.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 );
|
||
|
|
|
||
|
|
}`
|
||
|
|
};
|
||
|
|
|
||
|
|
THREE.NormalMapShader = NormalMapShader;
|
||
|
|
|
||
|
|
} )();
|