IMG_20171024_132026.jpg - (Please write your Exam Roll No END TERM EXAMINATION Exam Roll No Paper Code MCA203 Time 3 Hours THIRD SEMESTER[MCA

IMG_20171024_132026.jpg - (Please write your Exam Roll No...

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Unformatted text preview: (Please write your Exam Roll No.) 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 1 which is compulsory. Select one question from each unit. Answer the following briefly:- (a) Persistence (b) Resolution (2x10-20) (c) Aspect Ratio (d) Interlacing (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 Q2 UNIT-I (a) Write Bresenham's algorithm for scan conversion of a Circle. (b) Draw a circle with radius 10 and centre coordinates (25, 20) using (3) Bresenham's circle drawing algorithm. (c) Differentiate between 2D Rotation and 3D Rotation. (3) (4) 03 (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) UNIT-II Q4 What do you understand by Bazier Curves and Surfaces? How these are used and useful? Explain their properties and continuity conditions? (10) 05 (a) What do you mean by Projection? Discuss principal vanishing points for the standard perspective transformation. (5) (b) Differentiate between Orthographic and Oblique Parallel Projections, (5) UNIT-III 06 (a) Prove that any two successive rotations about a given rotation axis is commutative. (5) (b) Differentiate between Octree and BSP tree method of representing solid objects with suitable example. (5) 07 (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 (5) entire normalized device screen. (5) (b) Solve and write the matrix for reflection about line Y=X. UNIT-IV 08 What do you understand by hidden surface removal? Discuss Painters (Depth (10) Sort) algorithm for Hidden-Surface problem. 09 What steps are required to shade an object using Phong shading method of polygon rendering? How it overcomes the drawbacks of Gouraud Shading (10) Method?...
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