three
Version:
JavaScript 3D library
101 lines (63 loc) • 2.21 kB
JavaScript
import AnalyticLightNode from './AnalyticLightNode.js';
import { texture } from '../accessors/TextureNode.js';
import { uniform } from '../core/UniformNode.js';
import { lightViewPosition } from '../accessors/Lights.js';
import { renderGroup } from '../core/UniformGroupNode.js';
import { Matrix4 } from '../../math/Matrix4.js';
import { Vector3 } from '../../math/Vector3.js';
import { NodeUpdateType } from '../core/constants.js';
const _matrix41 = /*@__PURE__*/ new Matrix4();
const _matrix42 = /*@__PURE__*/ new Matrix4();
let ltcLib = null;
class RectAreaLightNode extends AnalyticLightNode {
static get type() {
return 'RectAreaLightNode';
}
constructor( light = null ) {
super( light );
this.halfHeight = uniform( new Vector3() ).setGroup( renderGroup );
this.halfWidth = uniform( new Vector3() ).setGroup( renderGroup );
this.updateType = NodeUpdateType.RENDER;
}
update( frame ) {
super.update( frame );
const { light } = this;
const viewMatrix = frame.camera.matrixWorldInverse;
_matrix42.identity();
_matrix41.copy( light.matrixWorld );
_matrix41.premultiply( viewMatrix );
_matrix42.extractRotation( _matrix41 );
this.halfWidth.value.set( light.width * 0.5, 0.0, 0.0 );
this.halfHeight.value.set( 0.0, light.height * 0.5, 0.0 );
this.halfWidth.value.applyMatrix4( _matrix42 );
this.halfHeight.value.applyMatrix4( _matrix42 );
}
setup( builder ) {
super.setup( builder );
let ltc_1, ltc_2;
if ( builder.isAvailable( 'float32Filterable' ) ) {
ltc_1 = texture( ltcLib.LTC_FLOAT_1 );
ltc_2 = texture( ltcLib.LTC_FLOAT_2 );
} else {
ltc_1 = texture( ltcLib.LTC_HALF_1 );
ltc_2 = texture( ltcLib.LTC_HALF_2 );
}
const { colorNode, light } = this;
const lightingModel = builder.context.lightingModel;
const lightPosition = lightViewPosition( light );
const reflectedLight = builder.context.reflectedLight;
lightingModel.directRectArea( {
lightColor: colorNode,
lightPosition,
halfWidth: this.halfWidth,
halfHeight: this.halfHeight,
reflectedLight,
ltc_1,
ltc_2
}, builder.stack, builder );
}
static setLTC( ltc ) {
ltcLib = ltc;
}
}
export default RectAreaLightNode;