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@@ -1,5 +1,15 @@
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/**
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- * @author bhouston / http://clara.io/ *
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+ *
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+ * Temporal Anti-Aliasing Render Pass
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+ *
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+ * @author bhouston / http://clara.io/
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+ *
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+ * 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.
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+ *
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+ * References:
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+ *
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+ * TODO: Add support for motion vector pas so that accumulation of samples across frames can occur on dynamics scenes.
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+ *
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*/
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THREE.TAARenderPass = function ( scene, camera, params ) {
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@@ -31,7 +41,7 @@ THREE.TAARenderPass = function ( scene, camera, params ) {
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transparent: true,
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blending: THREE.CustomBlending,
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blendSrc: THREE.OneFactor,
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- blendDst: THREE.OneMinusSrcAlphaFactor,
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+ blendDst: THREE.OneFactor,
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blendEquation: THREE.AddEquation,
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depthTest: false,
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depthWrite: false
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@@ -55,7 +65,7 @@ THREE.TAARenderPass.prototype.render = function ( renderer, writeBuffer, readBuf
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THREE.ManualMSAARenderPass.prototype.render.call( this, renderer, writeBuffer, readBuffer, delta );
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- this.accumulateIndex = 0;
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+ this.accumulateIndex = -1;
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return;
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}
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@@ -70,8 +80,22 @@ THREE.TAARenderPass.prototype.render = function ( renderer, writeBuffer, readBuf
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}
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+ if ( ! this.holdRenderTarget ) {
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+
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+ this.holdRenderTarget = new THREE.WebGLRenderTarget( readBuffer.width, readBuffer.height, this.params );
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+
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+ }
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+
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+ if( this.accumulate && this.accumulateIndex === -1 ) {
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+
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+ THREE.ManualMSAARenderPass.prototype.render.call( this, renderer, this.holdRenderTarget, readBuffer, delta );
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+
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+ this.accumulateIndex = 0;
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+ return;
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+
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+ }
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- if( this.accumulateIndex < jitterOffsets.length ) {
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+ if( this.accumulateIndex >= 0 && this.accumulateIndex < jitterOffsets.length ) {
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var autoClear = renderer.autoClear;
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renderer.autoClear = false;
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@@ -93,7 +117,6 @@ THREE.TAARenderPass.prototype.render = function ( renderer, writeBuffer, readBuf
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renderer.render( this.scene, this.camera, writeBuffer, true );
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- this.accumulateUniforms[ "scale" ].value = 1.0 / ( this.accumulateIndex + 1 );
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renderer.render( this.scene3, this.camera3, this.sampleRenderTarget, ( this.accumulateIndex == 0 ) );
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this.accumulateIndex ++;
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@@ -108,7 +131,7 @@ THREE.TAARenderPass.prototype.render = function ( renderer, writeBuffer, readBuf
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}
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this.accumulateUniforms[ "scale" ].value = 1.0;
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- this.accumulateUniforms[ "tForeground" ].value = this.sampleRenderTarget;
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+ this.accumulateUniforms[ "tForeground" ].value = ( this.accumulateIndex < jitterOffsets.length ) ? this.holdRenderTarget : this.sampleRenderTarget;
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renderer.render( this.scene3, this.camera3, writeBuffer );
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}
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Ben Houston