File: //var/www/aspa/three/addons/objects/ReflectorForSSRPass.js
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 };