1 /**
  2  * Camera for rendering cube maps
  3  *	- renders scene into axis-aligned cube
  4  *
  5  * @author alteredq / http://alteredqualia.com/
  6  */
  7 
  8 /**@constructor*/
  9 THREE.CubeCamera = function ( near, far, cubeResolution ) {
 10 
 11 	THREE.Object3D.call( this );
 12 
 13 	var fov = 90, aspect = 1;
 14 
 15 	var cameraPX = new THREE.PerspectiveCamera( fov, aspect, near, far );
 16 	cameraPX.up.set( 0, -1, 0 );
 17 	cameraPX.lookAt( new THREE.Vector3( 1, 0, 0 ) );
 18 	this.add( cameraPX );
 19 
 20 	var cameraNX = new THREE.PerspectiveCamera( fov, aspect, near, far );
 21 	cameraNX.up.set( 0, -1, 0 );
 22 	cameraNX.lookAt( new THREE.Vector3( -1, 0, 0 ) );
 23 	this.add( cameraNX );
 24 
 25 	var cameraPY = new THREE.PerspectiveCamera( fov, aspect, near, far );
 26 	cameraPY.up.set( 0, 0, 1 );
 27 	cameraPY.lookAt( new THREE.Vector3( 0, 1, 0 ) );
 28 	this.add( cameraPY );
 29 
 30 	var cameraNY = new THREE.PerspectiveCamera( fov, aspect, near, far );
 31 	cameraNY.up.set( 0, 0, -1 );
 32 	cameraNY.lookAt( new THREE.Vector3( 0, -1, 0 ) );
 33 	this.add( cameraNY );
 34 
 35 	var cameraPZ = new THREE.PerspectiveCamera( fov, aspect, near, far );
 36 	cameraPZ.up.set( 0, -1, 0 );
 37 	cameraPZ.lookAt( new THREE.Vector3( 0, 0, 1 ) );
 38 	this.add( cameraPZ );
 39 
 40 	var cameraNZ = new THREE.PerspectiveCamera( fov, aspect, near, far );
 41 	cameraNZ.up.set( 0, -1, 0 );
 42 	cameraNZ.lookAt( new THREE.Vector3( 0, 0, -1 ) );
 43 	this.add( cameraNZ );
 44 
 45 	this.renderTarget = new THREE.WebGLRenderTargetCube( cubeResolution, cubeResolution, { format: THREE.RGBFormat, magFilter: THREE.LinearFilter, minFilter: THREE.LinearFilter } );
 46 
 47 	this.updateCubeMap = function ( renderer, scene ) {
 48 
 49 		var renderTarget = this.renderTarget;
 50 		var generateMipmaps = renderTarget.generateMipmaps;
 51 
 52 		renderTarget.generateMipmaps = false;
 53 
 54 		renderTarget.activeCubeFace = 0;
 55 		renderer.render( scene, cameraPX, renderTarget );
 56 
 57 		renderTarget.activeCubeFace = 1;
 58 		renderer.render( scene, cameraNX, renderTarget );
 59 
 60 		renderTarget.activeCubeFace = 2;
 61 		renderer.render( scene, cameraPY, renderTarget );
 62 
 63 		renderTarget.activeCubeFace = 3;
 64 		renderer.render( scene, cameraNY, renderTarget );
 65 
 66 		renderTarget.activeCubeFace = 4;
 67 		renderer.render( scene, cameraPZ, renderTarget );
 68 
 69 		renderTarget.generateMipmaps = generateMipmaps;
 70 
 71 		renderTarget.activeCubeFace = 5;
 72 		renderer.render( scene, cameraNZ, renderTarget );
 73 
 74 	};
 75 
 76 };
 77 
 78 THREE.CubeCamera.prototype = Object.create( THREE.Object3D.prototype );
 79 

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