webvr js meetup initial commit

node_modules/three/examples/js/postprocessing/TAARenderPass.js

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+/**
+ *
+ * Temporal Anti-Aliasing Render Pass
+ *
+ * @author bhouston / http://clara.io/
+ *
+ * When there is no motion in the scene, the TAA render pass accumulates jittered camera samples across frames to create a high quality anti-aliased result.
+ *
+ * References:
+ *
+ * TODO: Add support for motion vector pas so that accumulation of samples across frames can occur on dynamics scenes.
+ *
+ */
+
+THREE.TAARenderPass = function ( scene, camera, params ) {
+
+	if ( THREE.SSAARenderPass === undefined ) {
+
+		console.error( "THREE.TAARenderPass relies on THREE.SSAARenderPass" );
+
+	}
+
+	THREE.SSAARenderPass.call( this, scene, camera, params );
+
+	this.sampleLevel = 0;
+	this.accumulate = false;
+
+};
+
+THREE.TAARenderPass.JitterVectors = THREE.SSAARenderPass.JitterVectors;
+
+THREE.TAARenderPass.prototype = Object.assign( Object.create( THREE.SSAARenderPass.prototype ), {
+
+	constructor: THREE.TAARenderPass,
+
+	render: function ( renderer, writeBuffer, readBuffer, delta ) {
+
+		if( ! this.accumulate ) {
+
+				THREE.SSAARenderPass.prototype.render.call( this, renderer, writeBuffer, readBuffer, delta );
+
+				this.accumulateIndex = -1;
+				return;
+
+		}
+
+		var jitterOffsets = THREE.TAARenderPass.JitterVectors[ 5 ];
+
+		if ( ! this.sampleRenderTarget ) {
+
+			this.sampleRenderTarget = new THREE.WebGLRenderTarget( readBuffer.width, readBuffer.height, this.params );
+
+		}
+
+		if ( ! this.holdRenderTarget ) {
+
+			this.holdRenderTarget = new THREE.WebGLRenderTarget( readBuffer.width, readBuffer.height, this.params );
+
+		}
+
+		if( this.accumulate && this.accumulateIndex === -1 ) {
+
+				THREE.SSAARenderPass.prototype.render.call( this, renderer, this.holdRenderTarget, readBuffer, delta );
+
+				this.accumulateIndex = 0;
+
+		}
+
+		var autoClear = renderer.autoClear;
+		renderer.autoClear = false;
+
+		var sampleWeight = 1.0 / ( jitterOffsets.length );
+
+		if( this.accumulateIndex >= 0 && this.accumulateIndex < jitterOffsets.length ) {
+
+			this.copyUniforms[ "opacity" ].value = sampleWeight;
+			this.copyUniforms[ "tDiffuse" ].value = writeBuffer.texture;
+
+			// render the scene multiple times, each slightly jitter offset from the last and accumulate the results.
+			var numSamplesPerFrame = Math.pow( 2, this.sampleLevel );
+			for ( var i = 0; i < numSamplesPerFrame; i ++ ) {
+
+				var j = this.accumulateIndex;
+				var jitterOffset = jitterOffsets[j];
+				if ( this.camera.setViewOffset ) {
+					this.camera.setViewOffset( readBuffer.width, readBuffer.height,
+						jitterOffset[ 0 ] * 0.0625, jitterOffset[ 1 ] * 0.0625,   // 0.0625 = 1 / 16
+						readBuffer.width, readBuffer.height );
+				}
+
+				renderer.render( this.scene, this.camera, writeBuffer, true );
+				renderer.render( this.scene2, this.camera2, this.sampleRenderTarget, ( this.accumulateIndex === 0 ) );
+
+				this.accumulateIndex ++;
+				if( this.accumulateIndex >= jitterOffsets.length ) break;
+			}
+
+			if ( this.camera.clearViewOffset ) this.camera.clearViewOffset();
+
+		}
+
+		var accumulationWeight = this.accumulateIndex * sampleWeight;
+
+		if( accumulationWeight > 0 ) {
+			this.copyUniforms[ "opacity" ].value = 1.0;
+			this.copyUniforms[ "tDiffuse" ].value = this.sampleRenderTarget.texture;
+			renderer.render( this.scene2, this.camera2, writeBuffer, true );
+		}
+		if( accumulationWeight < 1.0 ) {
+			this.copyUniforms[ "opacity" ].value = 1.0 - accumulationWeight;
+			this.copyUniforms[ "tDiffuse" ].value = this.holdRenderTarget.texture;
+			renderer.render( this.scene2, this.camera2, writeBuffer, ( accumulationWeight === 0 ) );
+		}
+
+		renderer.autoClear = autoClear;
+
+	}
+
+});