three
Version:
JavaScript 3D library
38 lines (20 loc) • 674 B
JavaScript
import SpotLightNode from './SpotLightNode.js';
import { texture } from '../accessors/TextureNode.js';
import { vec2 } from '../tsl/TSLBase.js';
class IESSpotLightNode extends SpotLightNode {
static get type() {
return 'IESSpotLightNode';
}
getSpotAttenuation( angleCosine ) {
const iesMap = this.light.iesMap;
let spotAttenuation = null;
if ( iesMap && iesMap.isTexture === true ) {
const angle = angleCosine.acos().mul( 1.0 / Math.PI );
spotAttenuation = texture( iesMap, vec2( angle, 0 ), 0 ).r;
} else {
spotAttenuation = super.getSpotAttenuation( angleCosine );
}
return spotAttenuation;
}
}
export default IESSpotLightNode;