three-stdlib/postprocessing/TexturePass.js

stand-alone library of threejs examples

import { UniformsUtils, ShaderMaterial } from "three";
import { Pass, FullScreenQuad } from "./Pass.js";
import { CopyShader } from "../shaders/CopyShader.js";
class TexturePass extends Pass {
  constructor(map, opacity) {
    super();
    const shader = CopyShader;
    this.map = map;
    this.opacity = opacity !== void 0 ? opacity : 1;
    this.uniforms = UniformsUtils.clone(shader.uniforms);
    this.material = new ShaderMaterial({
      uniforms: this.uniforms,
      vertexShader: shader.vertexShader,
      fragmentShader: shader.fragmentShader,
      depthTest: false,
      depthWrite: false,
      premultipliedAlpha: true
    });
    this.needsSwap = false;
    this.fsQuad = new FullScreenQuad(null);
  }
  render(renderer, writeBuffer, readBuffer) {
    const oldAutoClear = renderer.autoClear;
    renderer.autoClear = false;
    this.fsQuad.material = this.material;
    this.uniforms["opacity"].value = this.opacity;
    this.uniforms["tDiffuse"].value = this.map;
    this.material.transparent = this.opacity < 1;
    renderer.setRenderTarget(this.renderToScreen ? null : readBuffer);
    if (this.clear)
      renderer.clear();
    this.fsQuad.render(renderer);
    renderer.autoClear = oldAutoClear;
  }
  dispose() {
    this.material.dispose();
    this.fsQuad.dispose();
  }
}
export {
  TexturePass
};
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