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END TERM EXAMINATION
Exam Roll No .
Paper Code: MCA203
Time : 3 Hours
THIRD SEMESTER [MCA] DECEMBER-2012
Subject: Computer Graphics
Maximum Marks :60
Note: Attempt five questions including Q.no. 1 which is compulsory.
Select one question from each unit.
Answer the following briefly:-
(c) Aspect Ratio
(e) Size of a 640x480 inch image at 240 pixels per inch.
(f) Number of Pixels in 1024x1024 frame buffer.
(g) Coordinate transformations
(h) 2D reflection matrix
(i) Window to Viewport Mapping
() Parallel Projections
(a) Write Bresenham's algorithm for scan conversion of a Circle.
(b) Draw a circle with radius 10 and centre coordinates (25, 20) using
Bresenham's circle drawing algorithm.
(c) Differentiate between 2D Rotation and 3D Rotation.
(a) Discuss the concept of Boundary-Fill. How it is different from Flood-Fill. (5)
(b) Define Clipping. How Polygon Clipping is performed with Sutherland
Hodgeman polygon clipping algorithm? Illustrate with suitable example. (5)
What do you understand by Bazier Curves and Surfaces? How these are used
and useful? Explain their properties and continuity conditions?
(a) What do you mean by Projection? Discuss principal vanishing points for the
standard perspective transformation.
(b) Differentiate between Orthographic and Oblique Parallel Projections,
(a) Prove that any two successive rotations about a given rotation axis is
(b) Differentiate between Octree and BSP tree method of representing solid
objects with suitable example.
(a) Find the normalization transformation that maps a window with lower left
corner at (1, 1) and upper right corner at (3,5) onto a viewport that is the
entire normalized device screen.
(b) Solve and write the matrix for reflection about line Y=X.
What do you understand by hidden surface removal? Discuss Painters (Depth
Sort) algorithm for Hidden-Surface problem.
What steps are required to shade an object using Phong shading method of
polygon rendering? How it overcomes the drawbacks of Gouraud Shading
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