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( function () {
class ParallaxBarrierEffect {
constructor( renderer ) {
const _camera = new THREE.OrthographicCamera( - 1, 1, 1, - 1, 0, 1 );
const _scene = new THREE.Scene();
const _stereo = new THREE.StereoCamera();
const _params = {
minFilter: THREE.LinearFilter,
magFilter: THREE.NearestFilter,
format: THREE.RGBAFormat
};
const _renderTargetL = new THREE.WebGLRenderTarget( 512, 512, _params );
const _renderTargetR = new THREE.WebGLRenderTarget( 512, 512, _params );
const _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' )
} );
const mesh = new THREE.Mesh( new THREE.PlaneGeometry( 2, 2 ), _material );
_scene.add( mesh );
this.setSize = function ( width, height ) {
renderer.setSize( width, height );
const pixelRatio = renderer.getPixelRatio();
_renderTargetL.setSize( width * pixelRatio, height * pixelRatio );
_renderTargetR.setSize( width * pixelRatio, height * pixelRatio );
};
this.render = function ( scene, camera ) {
if ( scene.matrixWorldAutoUpdate === true ) scene.updateMatrixWorld();
if ( camera.parent === null && camera.matrixWorldAutoUpdate === true ) 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 );
};
}
}
THREE.ParallaxBarrierEffect = ParallaxBarrierEffect;
} )();