Do you think the objects created in the following Representation Schema are always valid? Justify your answers with examples.
(i) Wireframe
(ii) Sweeping technique
(iii) CSG
(iv) B-Rep
1. Why do we call a CSG-tree as the binary tree?
2. What types of objects can be represented using the CSG-Schema? What are the limiting factors?
3. What are the conditions for valid object representation in the CSG Schema?
4. What are the differences between a wireframe model and a B-Rep model of a 3-D object?