| import { |
| BackSide, |
| BufferGeometry, |
| Float32BufferAttribute, |
| Line, |
| LineBasicMaterial, |
| Mesh, |
| MeshBasicMaterial |
| } from 'three'; |
|
|
| |
| |
| |
|
|
| class RectAreaLightHelper extends Line { |
|
|
| constructor( light, color ) { |
|
|
| const positions = [ 1, 1, 0, - 1, 1, 0, - 1, - 1, 0, 1, - 1, 0, 1, 1, 0 ]; |
|
|
| const geometry = new BufferGeometry(); |
| geometry.setAttribute( 'position', new Float32BufferAttribute( positions, 3 ) ); |
| geometry.computeBoundingSphere(); |
|
|
| const material = new LineBasicMaterial( { fog: false } ); |
|
|
| super( geometry, material ); |
|
|
| this.light = light; |
| this.color = color; |
| 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 BufferGeometry(); |
| geometry2.setAttribute( 'position', new Float32BufferAttribute( positions2, 3 ) ); |
| geometry2.computeBoundingSphere(); |
|
|
| this.add( new Mesh( geometry2, new MeshBasicMaterial( { side: 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 ); |
|
|
| |
| 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.extractRotation( this.light.matrixWorld ).scale( this.scale ).copyPosition( this.light.matrixWorld ); |
|
|
| this.children[ 0 ].matrixWorld.copy( this.matrixWorld ); |
|
|
| } |
|
|
| dispose() { |
|
|
| this.geometry.dispose(); |
| this.material.dispose(); |
| this.children[ 0 ].geometry.dispose(); |
| this.children[ 0 ].material.dispose(); |
|
|
| } |
|
|
| } |
|
|
| export { RectAreaLightHelper }; |
|
|
