three 基础库
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

419 lines
14 KiB

2 years ago
import {
AddEquation,
Color,
CustomBlending,
DepthTexture,
DstAlphaFactor,
DstColorFactor,
LinearFilter,
MeshDepthMaterial,
MeshNormalMaterial,
NearestFilter,
NoBlending,
RGBADepthPacking,
RGBAFormat,
ShaderMaterial,
UniformsUtils,
UnsignedShortType,
Vector2,
WebGLRenderTarget,
ZeroFactor
} from '../../../build/three.module.js';
import { Pass, FullScreenQuad } from '../postprocessing/Pass.js';
import { SAOShader } from '../shaders/SAOShader.js';
import { DepthLimitedBlurShader } from '../shaders/DepthLimitedBlurShader.js';
import { BlurShaderUtils } from '../shaders/DepthLimitedBlurShader.js';
import { CopyShader } from '../shaders/CopyShader.js';
import { UnpackDepthRGBAShader } from '../shaders/UnpackDepthRGBAShader.js';
/**
* SAO implementation inspired from bhouston previous SAO work
*/
class SAOPass extends Pass {
constructor( scene, camera, depthTexture, useNormals, resolution ) {
super();
this.scene = scene;
this.camera = camera;
this.clear = true;
this.needsSwap = false;
this.supportsDepthTextureExtension = ( depthTexture !== undefined ) ? depthTexture : false;
this.supportsNormalTexture = ( useNormals !== undefined ) ? useNormals : false;
this.originalClearColor = new Color();
this._oldClearColor = new Color();
this.oldClearAlpha = 1;
this.params = {
output: 0,
saoBias: 0.5,
saoIntensity: 0.18,
saoScale: 1,
saoKernelRadius: 100,
saoMinResolution: 0,
saoBlur: true,
saoBlurRadius: 8,
saoBlurStdDev: 4,
saoBlurDepthCutoff: 0.01
};
this.resolution = ( resolution !== undefined ) ? new Vector2( resolution.x, resolution.y ) : new Vector2( 256, 256 );
this.saoRenderTarget = new WebGLRenderTarget( this.resolution.x, this.resolution.y, {
minFilter: LinearFilter,
magFilter: LinearFilter,
format: RGBAFormat
} );
this.blurIntermediateRenderTarget = this.saoRenderTarget.clone();
this.beautyRenderTarget = this.saoRenderTarget.clone();
this.normalRenderTarget = new WebGLRenderTarget( this.resolution.x, this.resolution.y, {
minFilter: NearestFilter,
magFilter: NearestFilter,
format: RGBAFormat
} );
this.depthRenderTarget = this.normalRenderTarget.clone();
if ( this.supportsDepthTextureExtension ) {
const depthTexture = new DepthTexture();
depthTexture.type = UnsignedShortType;
this.beautyRenderTarget.depthTexture = depthTexture;
this.beautyRenderTarget.depthBuffer = true;
}
this.depthMaterial = new MeshDepthMaterial();
this.depthMaterial.depthPacking = RGBADepthPacking;
this.depthMaterial.blending = NoBlending;
this.normalMaterial = new MeshNormalMaterial();
this.normalMaterial.blending = NoBlending;
if ( SAOShader === undefined ) {
console.error( 'THREE.SAOPass relies on SAOShader' );
}
this.saoMaterial = new ShaderMaterial( {
defines: Object.assign( {}, SAOShader.defines ),
fragmentShader: SAOShader.fragmentShader,
vertexShader: SAOShader.vertexShader,
uniforms: UniformsUtils.clone( SAOShader.uniforms )
} );
this.saoMaterial.extensions.derivatives = true;
this.saoMaterial.defines[ 'DEPTH_PACKING' ] = this.supportsDepthTextureExtension ? 0 : 1;
this.saoMaterial.defines[ 'NORMAL_TEXTURE' ] = this.supportsNormalTexture ? 1 : 0;
this.saoMaterial.defines[ 'PERSPECTIVE_CAMERA' ] = this.camera.isPerspectiveCamera ? 1 : 0;
this.saoMaterial.uniforms[ 'tDepth' ].value = ( this.supportsDepthTextureExtension ) ? depthTexture : this.depthRenderTarget.texture;
this.saoMaterial.uniforms[ 'tNormal' ].value = this.normalRenderTarget.texture;
this.saoMaterial.uniforms[ 'size' ].value.set( this.resolution.x, this.resolution.y );
this.saoMaterial.uniforms[ 'cameraInverseProjectionMatrix' ].value.copy( this.camera.projectionMatrixInverse );
this.saoMaterial.uniforms[ 'cameraProjectionMatrix' ].value = this.camera.projectionMatrix;
this.saoMaterial.blending = NoBlending;
if ( DepthLimitedBlurShader === undefined ) {
console.error( 'THREE.SAOPass relies on DepthLimitedBlurShader' );
}
this.vBlurMaterial = new ShaderMaterial( {
uniforms: UniformsUtils.clone( DepthLimitedBlurShader.uniforms ),
defines: Object.assign( {}, DepthLimitedBlurShader.defines ),
vertexShader: DepthLimitedBlurShader.vertexShader,
fragmentShader: DepthLimitedBlurShader.fragmentShader
} );
this.vBlurMaterial.defines[ 'DEPTH_PACKING' ] = this.supportsDepthTextureExtension ? 0 : 1;
this.vBlurMaterial.defines[ 'PERSPECTIVE_CAMERA' ] = this.camera.isPerspectiveCamera ? 1 : 0;
this.vBlurMaterial.uniforms[ 'tDiffuse' ].value = this.saoRenderTarget.texture;
this.vBlurMaterial.uniforms[ 'tDepth' ].value = ( this.supportsDepthTextureExtension ) ? depthTexture : this.depthRenderTarget.texture;
this.vBlurMaterial.uniforms[ 'size' ].value.set( this.resolution.x, this.resolution.y );
this.vBlurMaterial.blending = NoBlending;
this.hBlurMaterial = new ShaderMaterial( {
uniforms: UniformsUtils.clone( DepthLimitedBlurShader.uniforms ),
defines: Object.assign( {}, DepthLimitedBlurShader.defines ),
vertexShader: DepthLimitedBlurShader.vertexShader,
fragmentShader: DepthLimitedBlurShader.fragmentShader
} );
this.hBlurMaterial.defines[ 'DEPTH_PACKING' ] = this.supportsDepthTextureExtension ? 0 : 1;
this.hBlurMaterial.defines[ 'PERSPECTIVE_CAMERA' ] = this.camera.isPerspectiveCamera ? 1 : 0;
this.hBlurMaterial.uniforms[ 'tDiffuse' ].value = this.blurIntermediateRenderTarget.texture;
this.hBlurMaterial.uniforms[ 'tDepth' ].value = ( this.supportsDepthTextureExtension ) ? depthTexture : this.depthRenderTarget.texture;
this.hBlurMaterial.uniforms[ 'size' ].value.set( this.resolution.x, this.resolution.y );
this.hBlurMaterial.blending = NoBlending;
if ( CopyShader === undefined ) {
console.error( 'THREE.SAOPass relies on CopyShader' );
}
this.materialCopy = new ShaderMaterial( {
uniforms: UniformsUtils.clone( CopyShader.uniforms ),
vertexShader: CopyShader.vertexShader,
fragmentShader: CopyShader.fragmentShader,
blending: NoBlending
} );
this.materialCopy.transparent = true;
this.materialCopy.depthTest = false;
this.materialCopy.depthWrite = false;
this.materialCopy.blending = CustomBlending;
this.materialCopy.blendSrc = DstColorFactor;
this.materialCopy.blendDst = ZeroFactor;
this.materialCopy.blendEquation = AddEquation;
this.materialCopy.blendSrcAlpha = DstAlphaFactor;
this.materialCopy.blendDstAlpha = ZeroFactor;
this.materialCopy.blendEquationAlpha = AddEquation;
if ( UnpackDepthRGBAShader === undefined ) {
console.error( 'THREE.SAOPass relies on UnpackDepthRGBAShader' );
}
this.depthCopy = new ShaderMaterial( {
uniforms: UniformsUtils.clone( UnpackDepthRGBAShader.uniforms ),
vertexShader: UnpackDepthRGBAShader.vertexShader,
fragmentShader: UnpackDepthRGBAShader.fragmentShader,
blending: NoBlending
} );
this.fsQuad = new FullScreenQuad( null );
}
render( renderer, writeBuffer, readBuffer/*, deltaTime, maskActive*/ ) {
// Rendering readBuffer first when rendering to screen
if ( this.renderToScreen ) {
this.materialCopy.blending = NoBlending;
this.materialCopy.uniforms[ 'tDiffuse' ].value = readBuffer.texture;
this.materialCopy.needsUpdate = true;
this.renderPass( renderer, this.materialCopy, null );
}
if ( this.params.output === 1 ) {
return;
}
renderer.getClearColor( this._oldClearColor );
this.oldClearAlpha = renderer.getClearAlpha();
const oldAutoClear = renderer.autoClear;
renderer.autoClear = false;
renderer.setRenderTarget( this.depthRenderTarget );
renderer.clear();
this.saoMaterial.uniforms[ 'bias' ].value = this.params.saoBias;
this.saoMaterial.uniforms[ 'intensity' ].value = this.params.saoIntensity;
this.saoMaterial.uniforms[ 'scale' ].value = this.params.saoScale;
this.saoMaterial.uniforms[ 'kernelRadius' ].value = this.params.saoKernelRadius;
this.saoMaterial.uniforms[ 'minResolution' ].value = this.params.saoMinResolution;
this.saoMaterial.uniforms[ 'cameraNear' ].value = this.camera.near;
this.saoMaterial.uniforms[ 'cameraFar' ].value = this.camera.far;
// this.saoMaterial.uniforms['randomSeed'].value = Math.random();
const depthCutoff = this.params.saoBlurDepthCutoff * ( this.camera.far - this.camera.near );
this.vBlurMaterial.uniforms[ 'depthCutoff' ].value = depthCutoff;
this.hBlurMaterial.uniforms[ 'depthCutoff' ].value = depthCutoff;
this.vBlurMaterial.uniforms[ 'cameraNear' ].value = this.camera.near;
this.vBlurMaterial.uniforms[ 'cameraFar' ].value = this.camera.far;
this.hBlurMaterial.uniforms[ 'cameraNear' ].value = this.camera.near;
this.hBlurMaterial.uniforms[ 'cameraFar' ].value = this.camera.far;
this.params.saoBlurRadius = Math.floor( this.params.saoBlurRadius );
if ( ( this.prevStdDev !== this.params.saoBlurStdDev ) || ( this.prevNumSamples !== this.params.saoBlurRadius ) ) {
BlurShaderUtils.configure( this.vBlurMaterial, this.params.saoBlurRadius, this.params.saoBlurStdDev, new Vector2( 0, 1 ) );
BlurShaderUtils.configure( this.hBlurMaterial, this.params.saoBlurRadius, this.params.saoBlurStdDev, new Vector2( 1, 0 ) );
this.prevStdDev = this.params.saoBlurStdDev;
this.prevNumSamples = this.params.saoBlurRadius;
}
// Rendering scene to depth texture
renderer.setClearColor( 0x000000 );
renderer.setRenderTarget( this.beautyRenderTarget );
renderer.clear();
renderer.render( this.scene, this.camera );
// Re-render scene if depth texture extension is not supported
if ( ! this.supportsDepthTextureExtension ) {
// Clear rule : far clipping plane in both RGBA and Basic encoding
this.renderOverride( renderer, this.depthMaterial, this.depthRenderTarget, 0x000000, 1.0 );
}
if ( this.supportsNormalTexture ) {
// Clear rule : default normal is facing the camera
this.renderOverride( renderer, this.normalMaterial, this.normalRenderTarget, 0x7777ff, 1.0 );
}
// Rendering SAO texture
this.renderPass( renderer, this.saoMaterial, this.saoRenderTarget, 0xffffff, 1.0 );
// Blurring SAO texture
if ( this.params.saoBlur ) {
this.renderPass( renderer, this.vBlurMaterial, this.blurIntermediateRenderTarget, 0xffffff, 1.0 );
this.renderPass( renderer, this.hBlurMaterial, this.saoRenderTarget, 0xffffff, 1.0 );
}
let outputMaterial = this.materialCopy;
// Setting up SAO rendering
if ( this.params.output === 3 ) {
if ( this.supportsDepthTextureExtension ) {
this.materialCopy.uniforms[ 'tDiffuse' ].value = this.beautyRenderTarget.depthTexture;
this.materialCopy.needsUpdate = true;
} else {
this.depthCopy.uniforms[ 'tDiffuse' ].value = this.depthRenderTarget.texture;
this.depthCopy.needsUpdate = true;
outputMaterial = this.depthCopy;
}
} else if ( this.params.output === 4 ) {
this.materialCopy.uniforms[ 'tDiffuse' ].value = this.normalRenderTarget.texture;
this.materialCopy.needsUpdate = true;
} else {
this.materialCopy.uniforms[ 'tDiffuse' ].value = this.saoRenderTarget.texture;
this.materialCopy.needsUpdate = true;
}
// Blending depends on output, only want a CustomBlending when showing SAO
if ( this.params.output === 0 ) {
outputMaterial.blending = CustomBlending;
} else {
outputMaterial.blending = NoBlending;
}
// Rendering SAOPass result on top of previous pass
this.renderPass( renderer, outputMaterial, this.renderToScreen ? null : readBuffer );
renderer.setClearColor( this._oldClearColor, this.oldClearAlpha );
renderer.autoClear = oldAutoClear;
}
renderPass( renderer, passMaterial, renderTarget, clearColor, clearAlpha ) {
// save original state
renderer.getClearColor( this.originalClearColor );
const originalClearAlpha = renderer.getClearAlpha();
const originalAutoClear = renderer.autoClear;
renderer.setRenderTarget( renderTarget );
// setup pass state
renderer.autoClear = false;
if ( ( clearColor !== undefined ) && ( clearColor !== null ) ) {
renderer.setClearColor( clearColor );
renderer.setClearAlpha( clearAlpha || 0.0 );
renderer.clear();
}
this.fsQuad.material = passMaterial;
this.fsQuad.render( renderer );
// restore original state
renderer.autoClear = originalAutoClear;
renderer.setClearColor( this.originalClearColor );
renderer.setClearAlpha( originalClearAlpha );
}
renderOverride( renderer, overrideMaterial, renderTarget, clearColor, clearAlpha ) {
renderer.getClearColor( this.originalClearColor );
const originalClearAlpha = renderer.getClearAlpha();
const originalAutoClear = renderer.autoClear;
renderer.setRenderTarget( renderTarget );
renderer.autoClear = false;
clearColor = overrideMaterial.clearColor || clearColor;
clearAlpha = overrideMaterial.clearAlpha || clearAlpha;
if ( ( clearColor !== undefined ) && ( clearColor !== null ) ) {
renderer.setClearColor( clearColor );
renderer.setClearAlpha( clearAlpha || 0.0 );
renderer.clear();
}
this.scene.overrideMaterial = overrideMaterial;
renderer.render( this.scene, this.camera );
this.scene.overrideMaterial = null;
// restore original state
renderer.autoClear = originalAutoClear;
renderer.setClearColor( this.originalClearColor );
renderer.setClearAlpha( originalClearAlpha );
}
setSize( width, height ) {
this.beautyRenderTarget.setSize( width, height );
this.saoRenderTarget.setSize( width, height );
this.blurIntermediateRenderTarget.setSize( width, height );
this.normalRenderTarget.setSize( width, height );
this.depthRenderTarget.setSize( width, height );
this.saoMaterial.uniforms[ 'size' ].value.set( width, height );
this.saoMaterial.uniforms[ 'cameraInverseProjectionMatrix' ].value.copy( this.camera.projectionMatrixInverse );
this.saoMaterial.uniforms[ 'cameraProjectionMatrix' ].value = this.camera.projectionMatrix;
this.saoMaterial.needsUpdate = true;
this.vBlurMaterial.uniforms[ 'size' ].value.set( width, height );
this.vBlurMaterial.needsUpdate = true;
this.hBlurMaterial.uniforms[ 'size' ].value.set( width, height );
this.hBlurMaterial.needsUpdate = true;
}
}
SAOPass.OUTPUT = {
'Beauty': 1,
'Default': 0,
'SAO': 2,
'Depth': 3,
'Normal': 4
};
export { SAOPass };