Method render

src/Readback.ts:267–285

({
    reader,
    count,
    renderer,
  }: { reader: Rgba8Readback; count: number; renderer?: THREE.WebGLRenderer })

  // Perform render operation to run the Rgba8Readback program
  // but don't perform the readback yet.
  render({
    reader,
    count,
    renderer,
  }: { reader: Rgba8Readback; count: number; renderer?: THREE.WebGLRenderer }) {
    this.renderer = renderer || this.renderer;
    if (!this.renderer) {
      throw new Error("No renderer");
    }

    this.ensureCapacity(count);

    const { program, material } = this.prepareProgramMaterial(reader);
    program.update();

    const renderState = this.saveRenderState(this.renderer);
    this.process({ count, material });
    this.resetRenderState(this.renderer, renderState);
  }

  // Perform a readback of the render target, returning a buffer of the
  // given type.