code: public void setRoundRect (float x, float y, float width, float height,
                                float arcwidth, float archeight) {
          this.x = x;
          this.y = y;
          this.width = width;
          this.height = height;
          this.arcwidth = arcwidth;
          this.archeight = archeight;
      }
docs: Sets the frame and corner dimensions of this rectangle to the specified values.