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luxiaotao1123

2022-03-21 4f7e5d3dc070ea46f4ca243bcbae9eda76d8c8a0

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import {
    Color
} from '../../three.module.js';
import { Pass } from '../../lib/postprocessing/Pass.js';
 
class RenderPass extends Pass {
 
    constructor( scene, camera, overrideMaterial, clearColor, clearAlpha ) {
 
        super();
 
        this.scene = scene;
        this.camera = camera;
 
        this.overrideMaterial = overrideMaterial;
 
        this.clearColor = clearColor;
        this.clearAlpha = ( clearAlpha !== undefined ) ? clearAlpha : 0;
 
        this.clear = true;
        this.clearDepth = false;
        this.needsSwap = false;
        this._oldClearColor = new Color();
 
    }
 
    render( renderer, writeBuffer, readBuffer /*, deltaTime, maskActive */ ) {
 
        const oldAutoClear = renderer.autoClear;
        renderer.autoClear = false;
 
        let oldClearAlpha, oldOverrideMaterial;
 
        if ( this.overrideMaterial !== undefined ) {
 
            oldOverrideMaterial = this.scene.overrideMaterial;
 
            this.scene.overrideMaterial = this.overrideMaterial;
 
        }
 
        if ( this.clearColor ) {
 
            renderer.getClearColor( this._oldClearColor );
            oldClearAlpha = renderer.getClearAlpha();
 
            renderer.setClearColor( this.clearColor, this.clearAlpha );
 
        }
 
        if ( this.clearDepth ) {
 
            renderer.clearDepth();
 
        }
 
        renderer.setRenderTarget( this.renderToScreen ? null : readBuffer );
 
        // TODO: Avoid using autoClear properties, see https://github.com/mrdoob/three.js/pull/15571#issuecomment-465669600
        if ( this.clear ) renderer.clear( renderer.autoClearColor, renderer.autoClearDepth, renderer.autoClearStencil );
        renderer.render( this.scene, this.camera );
 
        if ( this.clearColor ) {
 
            renderer.setClearColor( this._oldClearColor, oldClearAlpha );
 
        }
 
        if ( this.overrideMaterial !== undefined ) {
 
            this.scene.overrideMaterial = oldOverrideMaterial;
 
        }
 
        renderer.autoClear = oldAutoClear;
 
    }
 
}
 
export { RenderPass };