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- ( function () {
- /**
- * This helper must be added as a child of the light
- */
- class RectAreaLightHelper extends THREE.Line {
- constructor( light, color ) {
- const positions = [ 1, 1, 0, - 1, 1, 0, - 1, - 1, 0, 1, - 1, 0, 1, 1, 0 ];
- const geometry = new THREE.BufferGeometry();
- geometry.setAttribute( 'position', new THREE.Float32BufferAttribute( positions, 3 ) );
- geometry.computeBoundingSphere();
- const material = new THREE.LineBasicMaterial( {
- fog: false
- } );
- super( geometry, material );
- this.light = light;
- this.color = color; // optional hardwired color for the helper
- this.type = 'RectAreaLightHelper'; //
- const positions2 = [ 1, 1, 0, - 1, 1, 0, - 1, - 1, 0, 1, 1, 0, - 1, - 1, 0, 1, - 1, 0 ];
- const geometry2 = new THREE.BufferGeometry();
- geometry2.setAttribute( 'position', new THREE.Float32BufferAttribute( positions2, 3 ) );
- geometry2.computeBoundingSphere();
- this.add( new THREE.Mesh( geometry2, new THREE.MeshBasicMaterial( {
- side: THREE.BackSide,
- fog: false
- } ) ) );
- }
- updateMatrixWorld() {
- this.scale.set( 0.5 * this.light.width, 0.5 * this.light.height, 1 );
- if ( this.color !== undefined ) {
- this.material.color.set( this.color );
- this.children[ 0 ].material.color.set( this.color );
- } else {
- this.material.color.copy( this.light.color ).multiplyScalar( this.light.intensity ); // prevent hue shift
- const c = this.material.color;
- const max = Math.max( c.r, c.g, c.b );
- if ( max > 1 ) c.multiplyScalar( 1 / max );
- this.children[ 0 ].material.color.copy( this.material.color );
- }
- this.matrixWorld.copy( this.light.matrixWorld ).scale( this.scale );
- this.children[ 0 ].matrixWorld.copy( this.matrixWorld );
- }
- dispose() {
- this.geometry.dispose();
- this.material.dispose();
- this.children[ 0 ].geometry.dispose();
- this.children[ 0 ].material.dispose();
- }
- }
- THREE.RectAreaLightHelper = RectAreaLightHelper;
- } )();
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