Autodesk 12812-051462-9011 User Guide 3 - Page 2773

Once you create a loft object you can change and animate its parameters and sub-objects: ■ Add and replace cross-section shapes or replace the path. ■ Change or animate the parameters of the path and shapes. ■ Change or animate the surface parameters of the loft object. The lofting process first requires that you create shape objects to serve as the path and cross-sections of your loft object. The term lofting comes from early shipbuilding. A large framework called a loft was built to hold the hull of a ship while it was assembled. The process of hoisting the ribs (cross-sections) of the hull into the loft became known as lofting. A traditional method for building three-dimensional models of a modern vehicle design is to draw cross-sections at a number of key points. These cross-sections are cut out to form two-dimensional templates that are then placed on a rail. The model builders fill in the space between the templates to generate the surface of the model. You create loft objects using a similar process. You first create two or more spline objects. One of these splines will be the rail, which is referred to as the path. The rest of the splines are the cross-sections of your object, which are called shapes. As you arrange your shapes along the path, the software generates a surface between the shapes. Log File (mental ray Renderer) The log file (.log) is an ASCII text file that contains messages generated by the mental ray renderer. You specify a name and location for the log file, and the "verbosity" level of the messages it contains, in the mental ray preferences on page 7787. Look At Object In the context of the Shape Facing operator on page 2901, a Look At object is the camera or object toward which particles face. 8028 | Glossary