first commit

public/sdk/three/jsm/effects/ParallaxBarrierEffect.js

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+import {
+	LinearFilter,
+	Mesh,
+	NearestFilter,
+	OrthographicCamera,
+	PlaneGeometry,
+	RGBAFormat,
+	Scene,
+	ShaderMaterial,
+	StereoCamera,
+	WebGLRenderTarget
+} from 'three';
+
+class ParallaxBarrierEffect {
+
+	constructor( renderer ) {
+
+		const _camera = new OrthographicCamera( - 1, 1, 1, - 1, 0, 1 );
+
+		const _scene = new Scene();
+
+		const _stereo = new StereoCamera();
+
+		const _params = { minFilter: LinearFilter, magFilter: NearestFilter, format: RGBAFormat };
+
+		const _renderTargetL = new WebGLRenderTarget( 512, 512, _params );
+		const _renderTargetR = new WebGLRenderTarget( 512, 512, _params );
+
+		const _material = new 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 );',
+
+				'	}',
+
+				'	#include <tonemapping_fragment>',
+				'	#include <colorspace_fragment>',
+
+				'}'
+
+			].join( '\n' )
+
+		} );
+
+		const mesh = new Mesh( new 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 );
+
+		};
+
+	}
+
+}
+
+export { ParallaxBarrierEffect };