three 基础库
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import {
LinearFilter,
RGBFormat,
ShaderMaterial,
UniformsUtils,
WebGLRenderTarget
} from '../../../build/three.module.js';
import { Pass, FullScreenQuad } from '../postprocessing/Pass.js';
import { CopyShader } from '../shaders/CopyShader.js';
class SavePass extends Pass {
constructor( renderTarget ) {
super();
if ( CopyShader === undefined ) console.error( 'THREE.SavePass relies on CopyShader' );
const shader = CopyShader;
this.textureID = 'tDiffuse';
this.uniforms = UniformsUtils.clone( shader.uniforms );
this.material = new ShaderMaterial( {
uniforms: this.uniforms,
vertexShader: shader.vertexShader,
fragmentShader: shader.fragmentShader
} );
this.renderTarget = renderTarget;
if ( this.renderTarget === undefined ) {
this.renderTarget = new WebGLRenderTarget( window.innerWidth, window.innerHeight, { minFilter: LinearFilter, magFilter: LinearFilter, format: RGBFormat } );
this.renderTarget.texture.name = 'SavePass.rt';
}
this.needsSwap = false;
this.fsQuad = new FullScreenQuad( this.material );
}
render( renderer, writeBuffer, readBuffer/*, deltaTime, maskActive */ ) {
if ( this.uniforms[ this.textureID ] ) {
this.uniforms[ this.textureID ].value = readBuffer.texture;
}
renderer.setRenderTarget( this.renderTarget );
if ( this.clear ) renderer.clear();
this.fsQuad.render( renderer );
}
}
export { SavePass };