4th Sem Model Question _-_Computer Graphics

Model Question: Computer Graphics

Semester: IV

Time: 3 hrs                                                                                         Full Marks: 100

-               Candidates are required to give their answers in their own words as far as practicable.

-               Attempt all questions. All questions carry equal marks

1.         How line can be drawn in the computer graphics? Explain in detail about Bresenhems's line drawing algorithm.

2.         What is a window to viewport transformation? Derive its transformation coefficient matrix.

3.         Explain the following terms with practical applications.

a)       3D Shear                          b)         2D Rotation

4.         What do you mean by clipping? Explain in detail about line clipping algorithm.

5.         Why filling algorithm is required? Explain about scan-line polygon fill algorithm.

6.         How computer animation can be generated? Explain with reference to the polygon table.

7.         How curves can be generated? Explain about Bezier curve.

8.         How hidden-surfaces can be removed? Explain in detail about plane equation method.

or

What happens if the hidden surface is not removed in the computer graphics? Explain in detail about depth buffer method.

9.         What do you mean by intensity assignment? Consider 512 pixels X 512 scan lines image with 24-bit true color. If 5 minutes video is required to capture, calculate the total memory required?

10.     Explain the importance of shading in the computer graphics. Explain in detail about Gouraud shading.

                                                                        or

Why shading model is required in the computer graphics? Explain in detail about Phong shading model.