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/var/www/uibuilder.cmshelp.dk/httpdocs/node_modules/three/examples/jsm/objects/ReflectorForSSRPass.js

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import {
	Color,
	Matrix4,
	Mesh,
	PerspectiveCamera,
	ShaderMaterial,
	UniformsUtils,
	Vector2,
	Vector3,
	WebGLRenderTarget,
	DepthTexture,
	UnsignedShortType,
	NearestFilter,
	Plane,
	HalfFloatType
} from 'three';

class ReflectorForSSRPass extends Mesh {

constructor( geometry, options = {} ) {

super( geometry );

this.isReflectorForSSRPass = true;

this.type = 'ReflectorForSSRPass';

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 || ReflectorForSSRPass.ReflectorShader;
		const useDepthTexture = options.useDepthTexture === true;
		const yAxis = new Vector3( 0, 1, 0 );
		const vecTemp0 = new Vector3();
		const vecTemp1 = new Vector3();

scope.needsUpdate = false;
		scope.maxDistance = ReflectorForSSRPass.ReflectorShader.uniforms.maxDistance.value;
		scope.opacity = ReflectorForSSRPass.ReflectorShader.uniforms.opacity.value;
		scope.color = color;
		scope.resolution = options.resolution || new Vector2( window.innerWidth, window.innerHeight );

scope._distanceAttenuation = ReflectorForSSRPass.ReflectorShader.defines.DISTANCE_ATTENUATION;
		Object.defineProperty( scope, 'distanceAttenuation', {
			get() {

return scope._distanceAttenuation;

},
			set( val ) {

if ( scope._distanceAttenuation === val ) return;
				scope._distanceAttenuation = val;
				scope.material.defines.DISTANCE_ATTENUATION = val;
				scope.material.needsUpdate = true;

}
		} );

scope._fresnel = ReflectorForSSRPass.ReflectorShader.defines.FRESNEL;
		Object.defineProperty( scope, 'fresnel', {
			get() {

return scope._fresnel;

},
			set( val ) {

if ( scope._fresnel === val ) return;
				scope._fresnel = val;
				scope.material.defines.FRESNEL = val;
				scope.material.needsUpdate = true;

}
		} );

const normal = new Vector3();
		const reflectorWorldPosition = new Vector3();
		const cameraWorldPosition = new Vector3();
		const rotationMatrix = new Matrix4();
		const lookAtPosition = new Vector3( 0, 0, - 1 );

const view = new Vector3();
		const target = new Vector3();

const textureMatrix = new Matrix4();
		const virtualCamera = new PerspectiveCamera();

let depthTexture;

if ( useDepthTexture ) {

depthTexture = new DepthTexture();
			depthTexture.type = UnsignedShortType;
			depthTexture.minFilter = NearestFilter;
			depthTexture.magFilter = NearestFilter;

}

const parameters = {
			depthTexture: useDepthTexture ? depthTexture : null,
			type: HalfFloatType
		};

const renderTarget = new WebGLRenderTarget( textureWidth, textureHeight, parameters );

const material = new ShaderMaterial( {
			name: ( shader.name !== undefined ) ? shader.name : 'unspecified',
			transparent: useDepthTexture,
			defines: Object.assign( {}, ReflectorForSSRPass.ReflectorShader.defines, {
				useDepthTexture
			} ),
			uniforms: UniformsUtils.clone( shader.uniforms ),
			fragmentShader: shader.fragmentShader,
			vertexShader: shader.vertexShader
		} );

material.uniforms[ 'tDiffuse' ].value = renderTarget.texture;
		material.uniforms[ 'color' ].value = scope.color;
		material.uniforms[ 'textureMatrix' ].value = textureMatrix;
		if ( useDepthTexture ) {

material.uniforms[ 'tDepth' ].value = renderTarget.depthTexture;

}

this.material = material;

const globalPlane = new Plane( new Vector3( 0, 1, 0 ), clipBias );
		const globalPlanes = [ globalPlane ];

this.doRender = function ( renderer, scene, camera ) {

material.uniforms[ 'maxDistance' ].value = scope.maxDistance;
			material.uniforms[ 'color' ].value = scope.color;
			material.uniforms[ 'opacity' ].value = scope.opacity;

vecTemp0.copy( camera.position ).normalize();
			vecTemp1.copy( vecTemp0 ).reflect( yAxis );
			material.uniforms[ 'fresnelCoe' ].value = ( vecTemp0.dot( vecTemp1 ) + 1. ) / 2.; // TODO: Also need to use glsl viewPosition and viewNormal per pixel.

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 );

material.uniforms[ 'virtualCameraNear' ].value = camera.near;
			material.uniforms[ 'virtualCameraFar' ].value = camera.far;
			material.uniforms[ 'virtualCameraMatrixWorld' ].value = virtualCamera.matrixWorld;
			material.uniforms[ 'virtualCameraProjectionMatrix' ].value = camera.projectionMatrix;
			material.uniforms[ 'virtualCameraProjectionMatrixInverse' ].value = camera.projectionMatrixInverse;
			material.uniforms[ 'resolution' ].value = scope.resolution;

// 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 );

// scope.visible = false;

const currentRenderTarget = renderer.getRenderTarget();

const currentXrEnabled = renderer.xr.enabled;
			const currentShadowAutoUpdate = renderer.shadowMap.autoUpdate;
			const currentClippingPlanes = renderer.clippingPlanes;

renderer.xr.enabled = false; // Avoid camera modification
			renderer.shadowMap.autoUpdate = false; // Avoid re-computing shadows
			renderer.clippingPlanes = globalPlanes;

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.clippingPlanes = currentClippingPlanes;

renderer.setRenderTarget( currentRenderTarget );

// Restore viewport

const viewport = camera.viewport;

if ( viewport !== undefined ) {

renderer.state.viewport( viewport );

}

// scope.visible = true;

};

this.getRenderTarget = function () {

return renderTarget;

};

}

ReflectorForSSRPass.ReflectorShader = {

name: 'ReflectorShader',

defines: {
		DISTANCE_ATTENUATION: true,
		FRESNEL: true,
	},

uniforms: {

color: { value: null },
		tDiffuse: { value: null },
		tDepth: { value: null },
		textureMatrix: { value: new Matrix4() },
		maxDistance: { value: 180 },
		opacity: { value: 0.5 },
		fresnelCoe: { value: null },
		virtualCameraNear: { value: null },
		virtualCameraFar: { value: null },
		virtualCameraProjectionMatrix: { value: new Matrix4() },
		virtualCameraMatrixWorld: { value: new Matrix4() },
		virtualCameraProjectionMatrixInverse: { value: new Matrix4() },
		resolution: { value: new Vector2() },

vertexShader: /* glsl */`
		uniform mat4 textureMatrix;
		varying vec4 vUv;

void main() {

vUv = textureMatrix * vec4( position, 1.0 );

gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );

}`,

fragmentShader: /* glsl */`
		uniform vec3 color;
		uniform sampler2D tDiffuse;
		uniform sampler2D tDepth;
		uniform float maxDistance;
		uniform float opacity;
		uniform float fresnelCoe;
		uniform float virtualCameraNear;
		uniform float virtualCameraFar;
		uniform mat4 virtualCameraProjectionMatrix;
		uniform mat4 virtualCameraProjectionMatrixInverse;
		uniform mat4 virtualCameraMatrixWorld;
		uniform vec2 resolution;
		varying vec4 vUv;
		#include <packing>
		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 ) );
		}
		float getDepth( const in vec2 uv ) {
			return texture2D( tDepth, uv ).x;
		}
		float getViewZ( const in float depth ) {
			return perspectiveDepthToViewZ( depth, virtualCameraNear, virtualCameraFar );
		}
		vec3 getViewPosition( const in vec2 uv, const in float depth/*clip space*/, const in float clipW ) {
			vec4 clipPosition = vec4( ( vec3( uv, depth ) - 0.5 ) * 2.0, 1.0 );//ndc
			clipPosition *= clipW; //clip
			return ( virtualCameraProjectionMatrixInverse * clipPosition ).xyz;//view
		}
		void main() {
			vec4 base = texture2DProj( tDiffuse, vUv );
			#ifdef useDepthTexture
				vec2 uv=(gl_FragCoord.xy-.5)/resolution.xy;
				uv.x=1.-uv.x;
				float depth = texture2DProj( tDepth, vUv ).r;
				float viewZ = getViewZ( depth );
				float clipW = virtualCameraProjectionMatrix[2][3] * viewZ+virtualCameraProjectionMatrix[3][3];
				vec3 viewPosition=getViewPosition( uv, depth, clipW );
				vec3 worldPosition=(virtualCameraMatrixWorld*vec4(viewPosition,1)).xyz;
				if(worldPosition.y>maxDistance) discard;
				float op=opacity;
				#ifdef DISTANCE_ATTENUATION
					float ratio=1.-(worldPosition.y/maxDistance);
					float attenuation=ratio*ratio;
					op=opacity*attenuation;
				#endif
				#ifdef FRESNEL
					op*=fresnelCoe;
				#endif
				gl_FragColor = vec4( blendOverlay( base.rgb, color ), op );
			#else
				gl_FragColor = vec4( blendOverlay( base.rgb, color ), 1.0 );
			#endif
		}
	`,
};

export { ReflectorForSSRPass };

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GroundedSkybox.js	1.38 KB	lrw-r--r--	2025-03-28 11:04:38	Edit Download recursive recursive
Lensflare.js	8.60 KB	lrw-r--r--	2025-03-28 11:04:38	Edit Download recursive recursive
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MarchingCubes.js	37.13 KB	lrw-r--r--	2025-03-28 11:04:38	Edit Download recursive recursive
Reflector.js	7.03 KB	lrw-r--r--	2025-03-28 11:04:39	Edit Download recursive recursive
ReflectorForSSRPass.js	10.17 KB	lrw-r--r--	2025-03-28 11:04:39	Edit Download recursive recursive
Refractor.js	7.98 KB	lrw-r--r--	2025-03-28 11:04:39	Edit Download recursive recursive
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WaterMesh.js	3.97 KB	lrw-r--r--	2025-03-28 11:04:39	Edit Download recursive recursive