tofu.js/src/postprocessing/RenderPass.js

a helper three.js library for building UC-AR

import Pass from './Pass';

export default 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 = false;
    this.clearDepth = false;
    this.needsSwap = false;
  }

  render(renderer, writeBuffer, readBuffer) {

    const oldAutoClear = renderer.autoClear;
    renderer.autoClear = false;

    this.scene.overrideMaterial = this.overrideMaterial;

    let oldClearColor;
    let oldClearAlpha;

    if (this.clearColor) {

      oldClearColor = renderer.getClearColor().getHex();
      oldClearAlpha = renderer.getClearAlpha();

      renderer.setClearColor(this.clearColor, this.clearAlpha);

    }

    if (this.clearDepth) {

      renderer.clearDepth();

    }

    renderer.render(this.scene, this.camera, this.renderToScreen ? null : readBuffer, this.clear);

    if (this.clearColor) {

      renderer.setClearColor(oldClearColor, oldClearAlpha);

    }

    this.scene.overrideMaterial = null;
    renderer.autoClear = oldAutoClear;
  }
}