B.TECH - Semester 7 computer graphics Question Paper 2013 (dec)
Practice authentic previous year university questions for better exam preparation.
Sample Questions
- How shadow mask CRT brings color in its display?
- What is aliasing effect? How it can be avoided?
- What do you mean by principle vanishing point?
- Row does GLUT handle keyboard input events?
- Write a program to set the background color using OpenGL. ( $5 \times 4=20$ Marks) (Answer any ONE question from each module. Each question carries 20 marks) ## (Module I)
- (a) Write the Bresenham's line generation algorithm to plot the line from $(20,10)$ to $(30,18)$.
- (b) Write down and explain the midpoint circle drawing algorithm. Assume 5 cm as the radius and co-ordinate origin as the centre of the circle. OR
- (a) Consider the following polygon, the scan lines L1, L2, L3 and L4 are generated for filling the polygon by the scan-line filling algorithm. Generate the intersection points along each scan line.
- (b) Explain the attributes of output primitives in detail. ## (Module II)
- (a) Explain in detail the Cohen-Sutherland line clipping algorithm with an example.
- (b) What is the need of homogeneous coordinates? Give reasons. OR
- (a) Explain the polygon clipping algorithm.
- (b) Write a detailed note on the basic two dimensional transformations. ## (Module III)
- (a) How does the scan line method determine which surfaces are hidden?
- (b) Differentiate parallel and perspective projections and derive their projection matrices.
- Explain with examples the following methods of hidden surface elimination. (a) Depth-sorting method.
- Explain with examples the following methods of hidden surface elimination. (b) BSP Tree Method. ## (Module IV)
- (a) Explain Gouraud shading and Phong shading.
- (b) What is the use of hidden line removing algorithm?
- (c) Define complementary colors.
- Explain the description of colors in the following color models. (a) YIQ Color Model
- Explain the description of colors in the following color models. (b) CMY Color Model and
- Explain the description of colors in the following color models. (c) HLS color Model