Extrude closed planar curves normal to the curve plane toward a boundary surface where the boundary surface is trimmed and joined to the extruded objects. Change the degree of the polynomial that defines the curve or surface by adding or subtracting control points between knot spans, while maintaining the knot structure. Displays the gumball widget on a selected object facilitating move, scale, and rotate transformations around the gumball origin. Store the connection between a command’s input geometry and the result, so that when the input geometry changes, the result updates accordingly. Change the current viewport properties to a parallel projection isometric view looking from a specified quadrant toward 0. Draw a polygon with a specified number of sides with options for inscribed/circumscribed, by edge, star-shaped, around a curve, and vertical. Draw a rectangular closed polyline from with options for starting at the center, three points, vertical, and rounded with arc or conic corners. Remove the selected surfaces from a polysurface, and then offset the remaining surfaces to create a solid with a specified thickness. Average the positions of curve and surface control points and mesh vertices in a specified region and evens out the spacing of selected control points in small increments to remove unwanted detail, and loops in curves and surfaces. Checks to see whether numbers with decimal points are being correctly printed and read using a period as the decimal point. If the decimal point has been changed to a comma, the command changes the decimal point character back to a period. Flatten (develop) a surface or polysurface with curvature in one direction to a planar surface while maintaining the u- and v-directions of the input surface. Source.