Page 1 Modeling a Mountain Bike: The Frame

Load the scene ’Curves1.3dm’ from the CD-ROM. This file contains the curves necessary to create the frames of the bike.You will be starting with the back frames of the bike. In the Front viewport, hold down left button mouse and drag a rectangle as shown below. This selects the curves within that area.

To make a surface out of these curves, go to ’Surface/Loft’ in the Menu panel. There are several options to how the surface will be lofted. Use the settings shown below. The ’Closed loft’ box makes the surface go all the way back to the beginning curve, making the surface closed.

Select the curves shown below, and repeat this step with these curves to loft the second rear frame.