1. Discuss the statement “Line trimming can be essential when constructing solid models”.


2. a) For the part below, describe how it would be represented with a winged edge B-Rep data structure. Draw the winged edges, then create data arrays.


b) For the model in part a) suggest how tolerances could be added to the arrays.



3. Draw a B-rep solid model representation for the box below. Vertices have been drawn, you will need to add the other data elements to complete the model.