Method beginGeometry

src/core/p5.Renderer3D.js:438–447

* Starts creating a new p5.Geometry. Subsequent shapes drawn will be added * to the geometry and then returned when * endGeometry() is called. One can also use * buildGeometry() to pass a function that * draws shapes. *

()

   * @private
   */
  beginGeometry() {
    if (this.geometryBuilder) {
      throw new Error(
        "It looks like `beginGeometry()` is being called while another p5.Geometry is already being build."
      );
    }
    this.geometryBuilder = new GeometryBuilder(this);
    this.geometryBuilder.prevFillColor = this.states.fillColor;
    this.fill(new Color([-1, -1, -1, -1]));
  }

  /**
   * Finishes creating a new <a href="#/p5.Geometry">p5.Geometry</a> that was