Initial commit

HTML/ThreeJS/node_modules/three/examples/js/helpers/RectAreaLightHelper.js

@@ -0,0 +1,74 @@
+( 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 );
+
+			} // ignore world scale on light
+
+
+			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();
+
+		}
+
+	}
+
+	THREE.RectAreaLightHelper = RectAreaLightHelper;
+
+} )();