1. Explain why the homogeneous coordinate system is generally used in graphics in place of a normal coordinate system, in particular for software implementation. Give an example to illustrate the...

1. Explain why the homogeneous coordinate system is generally used in graphics in place of a normal coordinate system, in particular for software implementation. Give an example to illustrate the advantage.

2. How do you obtain the orthographic projections of a 3D geometric database?

3. Explain the importance of clipping. Give details of methods used for line clipping.

4. Explain the Cohen–Sutherland clipping algorithm.

5. Explain the Sutherland–Hodgman clipping algorithm.

6. Explain the details of polygon clipping. Give its advantages compared to line clipping.