code: function(width, height, resolution) {
              var cag = this.expandToCAG(width / 2, resolution);
              var result = cag.extrude({
                  offset: [0, 0, height]
              });
              return result;
          }
docs: Extrude the path by following it with a rectangle (upright, perpendicular to the path direction) Returns a CSG solid width: width of the extrusion, in the z=0 plane height: height of the extrusion in the z direction resolution: number of segments per 360 degrees for the curve in a corner