three 基础库
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import {
ShaderMaterial,
UniformsUtils
} from '../../../build/three.module.js';
import { Pass, FullScreenQuad } from '../postprocessing/Pass.js';
import { FilmShader } from '../shaders/FilmShader.js';
class FilmPass extends Pass {
constructor( noiseIntensity, scanlinesIntensity, scanlinesCount, grayscale ) {
super();
if ( FilmShader === undefined ) console.error( 'THREE.FilmPass relies on FilmShader' );
const shader = FilmShader;
this.uniforms = UniformsUtils.clone( shader.uniforms );
this.material = new ShaderMaterial( {
uniforms: this.uniforms,
vertexShader: shader.vertexShader,
fragmentShader: shader.fragmentShader
} );
if ( grayscale !== undefined ) this.uniforms.grayscale.value = grayscale;
if ( noiseIntensity !== undefined ) this.uniforms.nIntensity.value = noiseIntensity;
if ( scanlinesIntensity !== undefined ) this.uniforms.sIntensity.value = scanlinesIntensity;
if ( scanlinesCount !== undefined ) this.uniforms.sCount.value = scanlinesCount;
this.fsQuad = new FullScreenQuad( this.material );
}
render( renderer, writeBuffer, readBuffer, deltaTime /*, maskActive */ ) {
this.uniforms[ 'tDiffuse' ].value = readBuffer.texture;
this.uniforms[ 'time' ].value += deltaTime;
if ( this.renderToScreen ) {
renderer.setRenderTarget( null );
this.fsQuad.render( renderer );
} else {
renderer.setRenderTarget( writeBuffer );
if ( this.clear ) renderer.clear();
this.fsQuad.render( renderer );
}
}
}
export { FilmPass };