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- THREE.ParallaxBarrierEffect = function ( renderer ) {
- var _camera = new THREE.OrthographicCamera( - 1, 1, 1, - 1, 0, 1 );
- var _scene = new THREE.Scene();
- var _stereo = new THREE.StereoCamera();
- var _params = { minFilter: THREE.LinearFilter, magFilter: THREE.NearestFilter, format: THREE.RGBAFormat };
- var _renderTargetL = new THREE.WebGLRenderTarget( 512, 512, _params );
- var _renderTargetR = new THREE.WebGLRenderTarget( 512, 512, _params );
- var _material = new THREE.ShaderMaterial( {
- uniforms: {
- 'mapLeft': { value: _renderTargetL.texture },
- 'mapRight': { value: _renderTargetR.texture }
- },
- vertexShader: [
- 'varying vec2 vUv;',
- 'void main() {',
- ' vUv = vec2( uv.x, uv.y );',
- ' gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );',
- '}'
- ].join( '\n' ),
- fragmentShader: [
- 'uniform sampler2D mapLeft;',
- 'uniform sampler2D mapRight;',
- 'varying vec2 vUv;',
- 'void main() {',
- ' vec2 uv = vUv;',
- ' if ( ( mod( gl_FragCoord.y, 2.0 ) ) > 1.00 ) {',
- ' gl_FragColor = texture2D( mapLeft, uv );',
- ' } else {',
- ' gl_FragColor = texture2D( mapRight, uv );',
- ' }',
- '}'
- ].join( '\n' )
- } );
- var mesh = new THREE.Mesh( new THREE.PlaneGeometry( 2, 2 ), _material );
- _scene.add( mesh );
- this.setSize = function ( width, height ) {
- renderer.setSize( width, height );
- var pixelRatio = renderer.getPixelRatio();
- _renderTargetL.setSize( width * pixelRatio, height * pixelRatio );
- _renderTargetR.setSize( width * pixelRatio, height * pixelRatio );
- };
- this.render = function ( scene, camera ) {
- scene.updateMatrixWorld();
- if ( camera.parent === null ) camera.updateMatrixWorld();
- _stereo.update( camera );
- renderer.setRenderTarget( _renderTargetL );
- renderer.clear();
- renderer.render( scene, _stereo.cameraL );
- renderer.setRenderTarget( _renderTargetR );
- renderer.clear();
- renderer.render( scene, _stereo.cameraR );
- renderer.setRenderTarget( null );
- renderer.render( _scene, _camera );
- };
- };
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