添加关照、全局等高线、修改图层问题

static/sdk/three/jsm/objects/Reflector.js

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+import {
+	Color,
+	Matrix4,
+	Mesh,
+	PerspectiveCamera,
+	Plane,
+	ShaderMaterial,
+	UniformsUtils,
+	Vector3,
+	Vector4,
+	WebGLRenderTarget,
+	HalfFloatType
+} from 'three';
+
+class Reflector extends Mesh {
+
+	constructor( geometry, options = {} ) {
+
+		super( geometry );
+
+		this.isReflector = true;
+
+		this.type = 'Reflector';
+		this.camera = new PerspectiveCamera();
+
+		const scope = this;
+
+		const color = ( options.color !== undefined ) ? new Color( options.color ) : new Color( 0x7F7F7F );
+		const textureWidth = options.textureWidth || 512;
+		const textureHeight = options.textureHeight || 512;
+		const clipBias = options.clipBias || 0;
+		const shader = options.shader || Reflector.ReflectorShader;
+		const multisample = ( options.multisample !== undefined ) ? options.multisample : 4;
+
+		//
+
+		const reflectorPlane = new Plane();
+		const normal = new Vector3();
+		const reflectorWorldPosition = new Vector3();
+		const cameraWorldPosition = new Vector3();
+		const rotationMatrix = new Matrix4();
+		const lookAtPosition = new Vector3( 0, 0, - 1 );
+		const clipPlane = new Vector4();
+
+		const view = new Vector3();
+		const target = new Vector3();
+		const q = new Vector4();
+
+		const textureMatrix = new Matrix4();
+		const virtualCamera = this.camera;
+
+		const renderTarget = new WebGLRenderTarget( textureWidth, textureHeight, { samples: multisample, type: HalfFloatType } );
+
+		const material = new ShaderMaterial( {
+			name: ( shader.name !== undefined ) ? shader.name : 'unspecified',
+			uniforms: UniformsUtils.clone( shader.uniforms ),
+			fragmentShader: shader.fragmentShader,
+			vertexShader: shader.vertexShader
+		} );
+
+		material.uniforms[ 'tDiffuse' ].value = renderTarget.texture;
+		material.uniforms[ 'color' ].value = color;
+		material.uniforms[ 'textureMatrix' ].value = textureMatrix;
+
+		this.material = material;
+
+		this.onBeforeRender = function ( renderer, scene, camera ) {
+
+			reflectorWorldPosition.setFromMatrixPosition( scope.matrixWorld );
+			cameraWorldPosition.setFromMatrixPosition( camera.matrixWorld );
+
+			rotationMatrix.extractRotation( scope.matrixWorld );
+
+			normal.set( 0, 0, 1 );
+			normal.applyMatrix4( rotationMatrix );
+
+			view.subVectors( reflectorWorldPosition, cameraWorldPosition );
+
+			// Avoid rendering when reflector is facing away
+
+			if ( view.dot( normal ) > 0 ) return;
+
+			view.reflect( normal ).negate();
+			view.add( reflectorWorldPosition );
+
+			rotationMatrix.extractRotation( camera.matrixWorld );
+
+			lookAtPosition.set( 0, 0, - 1 );
+			lookAtPosition.applyMatrix4( rotationMatrix );
+			lookAtPosition.add( cameraWorldPosition );
+
+			target.subVectors( reflectorWorldPosition, lookAtPosition );
+			target.reflect( normal ).negate();
+			target.add( reflectorWorldPosition );
+
+			virtualCamera.position.copy( view );
+			virtualCamera.up.set( 0, 1, 0 );
+			virtualCamera.up.applyMatrix4( rotationMatrix );
+			virtualCamera.up.reflect( normal );
+			virtualCamera.lookAt( target );
+
+			virtualCamera.far = camera.far; // Used in WebGLBackground
+
+			virtualCamera.updateMatrixWorld();
+			virtualCamera.projectionMatrix.copy( camera.projectionMatrix );
+
+			// Update the texture matrix
+			textureMatrix.set(
+				0.5, 0.0, 0.0, 0.5,
+				0.0, 0.5, 0.0, 0.5,
+				0.0, 0.0, 0.5, 0.5,
+				0.0, 0.0, 0.0, 1.0
+			);
+			textureMatrix.multiply( virtualCamera.projectionMatrix );
+			textureMatrix.multiply( virtualCamera.matrixWorldInverse );
+			textureMatrix.multiply( scope.matrixWorld );
+
+			// Now update projection matrix with new clip plane, implementing code from: http://www.terathon.com/code/oblique.html
+			// Paper explaining this technique: http://www.terathon.com/lengyel/Lengyel-Oblique.pdf
+			reflectorPlane.setFromNormalAndCoplanarPoint( normal, reflectorWorldPosition );
+			reflectorPlane.applyMatrix4( virtualCamera.matrixWorldInverse );
+
+			clipPlane.set( reflectorPlane.normal.x, reflectorPlane.normal.y, reflectorPlane.normal.z, reflectorPlane.constant );
+
+			const projectionMatrix = virtualCamera.projectionMatrix;
+
+			q.x = ( Math.sign( clipPlane.x ) + projectionMatrix.elements[ 8 ] ) / projectionMatrix.elements[ 0 ];
+			q.y = ( Math.sign( clipPlane.y ) + projectionMatrix.elements[ 9 ] ) / projectionMatrix.elements[ 5 ];
+			q.z = - 1.0;
+			q.w = ( 1.0 + projectionMatrix.elements[ 10 ] ) / projectionMatrix.elements[ 14 ];
+
+			// Calculate the scaled plane vector
+			clipPlane.multiplyScalar( 2.0 / clipPlane.dot( q ) );
+
+			// Replacing the third row of the projection matrix
+			projectionMatrix.elements[ 2 ] = clipPlane.x;
+			projectionMatrix.elements[ 6 ] = clipPlane.y;
+			projectionMatrix.elements[ 10 ] = clipPlane.z + 1.0 - clipBias;
+			projectionMatrix.elements[ 14 ] = clipPlane.w;
+
+			// Render
+			scope.visible = false;
+
+			const currentRenderTarget = renderer.getRenderTarget();
+
+			const currentXrEnabled = renderer.xr.enabled;
+			const currentShadowAutoUpdate = renderer.shadowMap.autoUpdate;
+
+			renderer.xr.enabled = false; // Avoid camera modification
+			renderer.shadowMap.autoUpdate = false; // Avoid re-computing shadows
+
+			renderer.setRenderTarget( renderTarget );
+
+			renderer.state.buffers.depth.setMask( true ); // make sure the depth buffer is writable so it can be properly cleared, see #18897
+
+			if ( renderer.autoClear === false ) renderer.clear();
+			renderer.render( scene, virtualCamera );
+
+			renderer.xr.enabled = currentXrEnabled;
+			renderer.shadowMap.autoUpdate = currentShadowAutoUpdate;
+
+			renderer.setRenderTarget( currentRenderTarget );
+
+			// Restore viewport
+
+			const viewport = camera.viewport;
+
+			if ( viewport !== undefined ) {
+
+				renderer.state.viewport( viewport );
+
+			}
+
+			scope.visible = true;
+
+		};
+
+		this.getRenderTarget = function () {
+
+			return renderTarget;
+
+		};
+
+		this.dispose = function () {
+
+			renderTarget.dispose();
+			scope.material.dispose();
+
+		};
+
+	}
+
+}
+
+Reflector.ReflectorShader = {
+
+	name: 'ReflectorShader',
+
+	uniforms: {
+
+		'color': {
+			value: null
+		},
+
+		'tDiffuse': {
+			value: null
+		},
+
+		'textureMatrix': {
+			value: null
+		}
+
+	},
+
+	vertexShader: /* glsl */`
+		uniform mat4 textureMatrix;
+		varying vec4 vUv;
+
+		#include <common>
+		#include <logdepthbuf_pars_vertex>
+
+		void main() {
+
+			vUv = textureMatrix * vec4( position, 1.0 );
+
+			gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
+
+			#include <logdepthbuf_vertex>
+
+		}`,
+
+	fragmentShader: /* glsl */`
+		uniform vec3 color;
+		uniform sampler2D tDiffuse;
+		varying vec4 vUv;
+
+		#include <logdepthbuf_pars_fragment>
+
+		float blendOverlay( float base, float blend ) {
+
+			return( base < 0.5 ? ( 2.0 * base * blend ) : ( 1.0 - 2.0 * ( 1.0 - base ) * ( 1.0 - blend ) ) );
+
+		}
+
+		vec3 blendOverlay( vec3 base, vec3 blend ) {
+
+			return vec3( blendOverlay( base.r, blend.r ), blendOverlay( base.g, blend.g ), blendOverlay( base.b, blend.b ) );
+
+		}
+
+		void main() {
+
+			#include <logdepthbuf_fragment>
+
+			vec4 base = texture2DProj( tDiffuse, vUv );
+			gl_FragColor = vec4( blendOverlay( base.rgb, color ), 1.0 );
+
+			#include <tonemapping_fragment>
+			#include <colorspace_fragment>
+
+		}`
+};
+
+export { Reflector };