three
Version:
JavaScript 3D library
31 lines (19 loc) • 903 B
JavaScript
import { Color } from '../math/Color.js';
import { Vector3 } from '../math/Vector3.js';
import { LightProbe } from './LightProbe.js';
class HemisphereLightProbe extends LightProbe {
constructor( skyColor, groundColor, intensity = 1 ) {
super( undefined, intensity );
const color1 = new Color().set( skyColor );
const color2 = new Color().set( groundColor );
const sky = new Vector3( color1.r, color1.g, color1.b );
const ground = new Vector3( color2.r, color2.g, color2.b );
// without extra factor of PI in the shader, should = 1 / Math.sqrt( Math.PI );
const c0 = Math.sqrt( Math.PI );
const c1 = c0 * Math.sqrt( 0.75 );
this.sh.coefficients[ 0 ].copy( sky ).add( ground ).multiplyScalar( c0 );
this.sh.coefficients[ 1 ].copy( sky ).sub( ground ).multiplyScalar( c1 );
}
}
HemisphereLightProbe.prototype.isHemisphereLightProbe = true;
export { HemisphereLightProbe };