435 lines
12 KiB
JavaScript
435 lines
12 KiB
JavaScript
import { Color, DepthTexture, FloatType, RenderTarget, Vector2, PostProcessingUtils } from 'three';
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import { Loop, int, exp, min, float, mul, uv, vec2, vec3, Fn, textureSize, orthographicDepthToViewZ, QuadMesh, screenUV, TempNode, nodeObject, NodeUpdateType, uniform, vec4, NodeMaterial, passTexture, texture, perspectiveDepthToViewZ, positionView } from 'three/tsl';
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const _quadMesh = /*@__PURE__*/ new QuadMesh();
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const _size = /*@__PURE__*/ new Vector2();
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const _BLUR_DIRECTION_X = /*@__PURE__*/ new Vector2( 1.0, 0.0 );
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const _BLUR_DIRECTION_Y = /*@__PURE__*/ new Vector2( 0.0, 1.0 );
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let _rendererState;
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class OutlineNode extends TempNode {
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static get type() {
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return 'OutlineNode';
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}
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constructor( scene, camera, params = {} ) {
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super( 'vec4' );
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const {
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selectedObjects = [],
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edgeThickness = float( 1 ),
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edgeGlow = float( 0 ),
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downSampleRatio = 2
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} = params;
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this.scene = scene;
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this.camera = camera;
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this.selectedObjects = selectedObjects;
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this.edgeThicknessNode = nodeObject( edgeThickness );
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this.edgeGlowNode = nodeObject( edgeGlow );
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this.downSampleRatio = downSampleRatio;
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this.updateBeforeType = NodeUpdateType.FRAME;
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// render targets
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this._renderTargetDepthBuffer = new RenderTarget();
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this._renderTargetDepthBuffer.depthTexture = new DepthTexture();
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this._renderTargetDepthBuffer.depthTexture.type = FloatType;
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this._renderTargetMaskBuffer = new RenderTarget();
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this._renderTargetMaskDownSampleBuffer = new RenderTarget( 1, 1, { depthBuffer: false } );
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this._renderTargetEdgeBuffer1 = new RenderTarget( 1, 1, { depthBuffer: false } );
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this._renderTargetEdgeBuffer2 = new RenderTarget( 1, 1, { depthBuffer: false } );
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this._renderTargetBlurBuffer1 = new RenderTarget( 1, 1, { depthBuffer: false } );
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this._renderTargetBlurBuffer2 = new RenderTarget( 1, 1, { depthBuffer: false } );
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this._renderTargetComposite = new RenderTarget( 1, 1, { depthBuffer: false } );
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// uniforms
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this._cameraNear = uniform( camera.near );
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this._cameraFar = uniform( camera.far );
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this._blurDirection = uniform( new Vector2() );
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this._depthTextureUniform = texture( this._renderTargetDepthBuffer.depthTexture );
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this._maskTextureUniform = texture( this._renderTargetMaskBuffer.texture );
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this._maskTextureDownsSampleUniform = texture( this._renderTargetMaskDownSampleBuffer.texture );
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this._edge1TextureUniform = texture( this._renderTargetEdgeBuffer1.texture );
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this._edge2TextureUniform = texture( this._renderTargetEdgeBuffer2.texture );
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this._blurColorTextureUniform = texture( this._renderTargetEdgeBuffer1.texture );
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// constants
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this._visibleEdgeColor = vec3( 1, 0, 0 );
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this._hiddenEdgeColor = vec3( 0, 1, 0 );
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// materials
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this._depthMaterial = new NodeMaterial();
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this._depthMaterial.fragmentNode = vec4( 0, 0, 0, 1 );
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this._depthMaterial.name = 'OutlineNode.depth';
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this._prepareMaskMaterial = new NodeMaterial();
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this._prepareMaskMaterial.name = 'OutlineNode.prepareMask';
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this._materialCopy = new NodeMaterial();
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this._materialCopy.name = 'OutlineNode.copy';
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this._edgeDetectionMaterial = new NodeMaterial();
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this._edgeDetectionMaterial.name = 'OutlineNode.edgeDetection';
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this._separableBlurMaterial = new NodeMaterial();
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this._separableBlurMaterial.name = 'OutlineNode.separableBlur';
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this._separableBlurMaterial2 = new NodeMaterial();
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this._separableBlurMaterial2.name = 'OutlineNode.separableBlur2';
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this._compositeMaterial = new NodeMaterial();
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this._compositeMaterial.name = 'OutlineNode.composite';
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//
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this._selectionCache = new Set();
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this._tempPulseColor1 = new Color();
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this._tempPulseColor2 = new Color();
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//
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this._textureNode = passTexture( this, this._renderTargetComposite.texture );
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}
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get visibleEdge() {
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return this.r;
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}
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get hiddenEdge() {
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return this.g;
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}
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getTextureNode() {
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return this._textureNode;
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}
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setSize( width, height ) {
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this._renderTargetDepthBuffer.setSize( width, height );
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this._renderTargetMaskBuffer.setSize( width, height );
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this._renderTargetComposite.setSize( width, height );
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// downsample 1
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let resx = Math.round( width / this.downSampleRatio );
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let resy = Math.round( height / this.downSampleRatio );
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this._renderTargetMaskDownSampleBuffer.setSize( resx, resy );
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this._renderTargetEdgeBuffer1.setSize( resx, resy );
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this._renderTargetBlurBuffer1.setSize( resx, resy );
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// downsample 2
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resx = Math.round( resx / 2 );
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resy = Math.round( resy / 2 );
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this._renderTargetEdgeBuffer2.setSize( resx, resy );
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this._renderTargetBlurBuffer2.setSize( resx, resy );
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}
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updateBefore( frame ) {
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const { renderer } = frame;
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const { camera, scene } = this;
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_rendererState = PostProcessingUtils.resetRendererAndSceneState( renderer, scene, _rendererState );
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//
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const size = renderer.getDrawingBufferSize( _size );
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this.setSize( size.width, size.height );
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//
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renderer.setClearColor( 0xffffff, 1 );
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this._updateSelectionCache();
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// 1. Draw non-selected objects in the depth buffer
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scene.overrideMaterial = this._depthMaterial;
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renderer.setRenderTarget( this._renderTargetDepthBuffer );
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renderer.setRenderObjectFunction( ( object, ...params ) => {
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if ( this._selectionCache.has( object ) === false ) {
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renderer.renderObject( object, ...params );
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}
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} );
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renderer.render( scene, camera );
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// 2. Draw only the selected objects by comparing the depth buffer of non-selected objects
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scene.overrideMaterial = this._prepareMaskMaterial;
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renderer.setRenderTarget( this._renderTargetMaskBuffer );
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renderer.setRenderObjectFunction( ( object, ...params ) => {
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if ( this._selectionCache.has( object ) === true ) {
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renderer.renderObject( object, ...params );
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}
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} );
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renderer.render( scene, camera );
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//
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renderer.setRenderObjectFunction( _rendererState.renderObjectFunction );
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this._selectionCache.clear();
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// 3. Downsample to (at least) half resolution
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_quadMesh.material = this._materialCopy;
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renderer.setRenderTarget( this._renderTargetMaskDownSampleBuffer );
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_quadMesh.render( renderer );
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// 4. Perform edge detection (half resolution)
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_quadMesh.material = this._edgeDetectionMaterial;
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renderer.setRenderTarget( this._renderTargetEdgeBuffer1 );
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_quadMesh.render( renderer );
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// 5. Apply blur (half resolution)
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this._blurColorTextureUniform.value = this._renderTargetEdgeBuffer1.texture;
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this._blurDirection.value.copy( _BLUR_DIRECTION_X );
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_quadMesh.material = this._separableBlurMaterial;
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renderer.setRenderTarget( this._renderTargetBlurBuffer1 );
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_quadMesh.render( renderer );
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this._blurColorTextureUniform.value = this._renderTargetBlurBuffer1.texture;
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this._blurDirection.value.copy( _BLUR_DIRECTION_Y );
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renderer.setRenderTarget( this._renderTargetEdgeBuffer1 );
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_quadMesh.render( renderer );
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// 6. Apply blur (quarter resolution)
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this._blurColorTextureUniform.value = this._renderTargetEdgeBuffer1.texture;
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this._blurDirection.value.copy( _BLUR_DIRECTION_X );
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_quadMesh.material = this._separableBlurMaterial2;
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renderer.setRenderTarget( this._renderTargetBlurBuffer2 );
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_quadMesh.render( renderer );
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this._blurColorTextureUniform.value = this._renderTargetBlurBuffer2.texture;
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this._blurDirection.value.copy( _BLUR_DIRECTION_Y );
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renderer.setRenderTarget( this._renderTargetEdgeBuffer2 );
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_quadMesh.render( renderer );
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// 7. Composite
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_quadMesh.material = this._compositeMaterial;
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renderer.setRenderTarget( this._renderTargetComposite );
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_quadMesh.render( renderer );
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// restore
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PostProcessingUtils.restoreRendererAndSceneState( renderer, scene, _rendererState );
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}
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setup() {
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// prepare mask material
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const prepareMask = () => {
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const depth = this._depthTextureUniform.uv( screenUV );
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let viewZNode;
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if ( this.camera.isPerspectiveCamera ) {
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viewZNode = perspectiveDepthToViewZ( depth, this._cameraNear, this._cameraFar );
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} else {
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viewZNode = orthographicDepthToViewZ( depth, this._cameraNear, this._cameraFar );
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}
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const depthTest = positionView.z.lessThanEqual( viewZNode ).select( 1, 0 );
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return vec4( 0.0, depthTest, 1.0, 1.0 );
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};
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this._prepareMaskMaterial.fragmentNode = prepareMask();
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this._prepareMaskMaterial.needsUpdate = true;
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// copy material
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this._materialCopy.fragmentNode = this._maskTextureUniform;
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this._materialCopy.needsUpdate = true;
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// edge detection material
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const edgeDetection = Fn( () => {
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const resolution = textureSize( this._maskTextureDownsSampleUniform );
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const invSize = vec2( 1 ).div( resolution ).toVar();
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const uvOffset = vec4( 1.0, 0.0, 0.0, 1.0 ).mul( vec4( invSize, invSize ) );
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const uvNode = uv();
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const c1 = this._maskTextureDownsSampleUniform.uv( uvNode.add( uvOffset.xy ) ).toVar();
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const c2 = this._maskTextureDownsSampleUniform.uv( uvNode.sub( uvOffset.xy ) ).toVar();
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const c3 = this._maskTextureDownsSampleUniform.uv( uvNode.add( uvOffset.yw ) ).toVar();
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const c4 = this._maskTextureDownsSampleUniform.uv( uvNode.sub( uvOffset.yw ) ).toVar();
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const diff1 = mul( c1.r.sub( c2.r ), 0.5 );
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const diff2 = mul( c3.r.sub( c4.r ), 0.5 );
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const d = vec2( diff1, diff2 ).length();
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const a1 = min( c1.g, c2.g );
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const a2 = min( c3.g, c4.g );
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const visibilityFactor = min( a1, a2 );
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const edgeColor = visibilityFactor.oneMinus().greaterThan( 0.001 ).select( this._visibleEdgeColor, this._hiddenEdgeColor );
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return vec4( edgeColor, 1 ).mul( d );
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} );
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this._edgeDetectionMaterial.fragmentNode = edgeDetection();
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this._edgeDetectionMaterial.needsUpdate = true;
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// seperable blur material
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const MAX_RADIUS = 4;
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const gaussianPdf = Fn( ( [ x, sigma ] ) => {
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return float( 0.39894 ).mul( exp( float( - 0.5 ).mul( x ).mul( x ).div( sigma.mul( sigma ) ) ).div( sigma ) );
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} );
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const seperableBlur = Fn( ( [ kernelRadius ] ) => {
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const resolution = textureSize( this._maskTextureDownsSampleUniform );
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const invSize = vec2( 1 ).div( resolution ).toVar();
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const uvNode = uv();
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const sigma = kernelRadius.div( 2 ).toVar();
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const weightSum = gaussianPdf( 0, sigma ).toVar();
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const diffuseSum = this._blurColorTextureUniform.uv( uvNode ).mul( weightSum ).toVar();
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const delta = this._blurDirection.mul( invSize ).mul( kernelRadius ).div( MAX_RADIUS ).toVar();
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const uvOffset = delta.toVar();
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Loop( { start: int( 1 ), end: int( MAX_RADIUS ), type: 'int', condition: '<=' }, ( { i } ) => {
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const x = kernelRadius.mul( float( i ) ).div( MAX_RADIUS );
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const w = gaussianPdf( x, sigma );
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const sample1 = this._blurColorTextureUniform.uv( uvNode.add( uvOffset ) );
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const sample2 = this._blurColorTextureUniform.uv( uvNode.sub( uvOffset ) );
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diffuseSum.addAssign( sample1.add( sample2 ).mul( w ) );
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weightSum.addAssign( w.mul( 2 ) );
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uvOffset.addAssign( delta );
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} );
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return diffuseSum.div( weightSum );
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} );
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this._separableBlurMaterial.fragmentNode = seperableBlur( this.edgeThicknessNode );
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this._separableBlurMaterial.needsUpdate = true;
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this._separableBlurMaterial2.fragmentNode = seperableBlur( MAX_RADIUS );
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this._separableBlurMaterial2.needsUpdate = true;
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// composite material
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const composite = Fn( () => {
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const edgeValue1 = this._edge1TextureUniform;
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const edgeValue2 = this._edge2TextureUniform;
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const maskColor = this._maskTextureUniform;
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const edgeValue = edgeValue1.add( edgeValue2.mul( this.edgeGlowNode ) );
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return maskColor.r.mul( edgeValue );
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} );
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this._compositeMaterial.fragmentNode = composite();
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this._compositeMaterial.needsUpdate = true;
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return this._textureNode;
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}
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dispose() {
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this.selectedObjects.length = 0;
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this._renderTargetDepthBuffer.dispose();
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this._renderTargetMaskBuffer.dispose();
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this._renderTargetMaskDownSampleBuffer.dispose();
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this._renderTargetEdgeBuffer1.dispose();
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this._renderTargetEdgeBuffer2.dispose();
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this._renderTargetBlurBuffer1.dispose();
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this._renderTargetBlurBuffer2.dispose();
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this._renderTargetComposite.dispose();
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this._depthMaterial.dispose();
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this._prepareMaskMaterial.dispose();
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this._materialCopy.dispose();
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this._edgeDetectionMaterial.dispose();
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this._separableBlurMaterial.dispose();
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this._separableBlurMaterial2.dispose();
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this._compositeMaterial.dispose();
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}
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//
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_updateSelectionCache() {
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for ( let i = 0; i < this.selectedObjects.length; i ++ ) {
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const selectedObject = this.selectedObjects[ i ];
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selectedObject.traverse( ( object ) => {
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if ( object.isMesh ) this._selectionCache.add( object );
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} );
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}
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}
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}
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export default OutlineNode;
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export const outline = ( scene, camera, params ) => nodeObject( new OutlineNode( scene, camera, params ) );
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