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IGNOU UNIVERSITY MCA - III (SEM 5) JUN 2010 : Computer Graphics and Multimedia

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No. of Printed Pages : 4 I MCS-053 I MCA (Revised) Term-End Examination N June, 2010 MCS-053 : COMPUTER GRAPHICS AND MULTIMEDIA Maximum Marks : 100 Time : 3 hours Note : Question Number 1 is compulsory. Attempt any three questions from the rest. 1. (a) What are the number of memory bits 5 required for 8 - bit plane frame buffer for a 512 x 512 raster ? Also calculate the refresh rate for the same raster (512 x 512), if pixels are accessed at the rate of 250 nano seconds. Differentiate between Random and Raster Scan display devices. Use DDA line generation algorithm to draw a line from (2, 2) to (8, 6). Derive a general transformation matrix for 3-D rotation about x-axis. Perform a 45 rotation of a triangle A (1, 1), B (5, 1), C (3, 5) about an arbitrary point (3, 3). MCS-053 1 5 5 5 5 P.T.O. Explain any one method of polygon Representation with the help of an example. How many key frames does a 45 seconds animation film sequence with no duplications require if there are four in between frames for each pair of key frames ? What will happen if duplication is allowed ? 5 (h) Why file Compression Techniques are beneficial in Computer Graphics ? 5 (a) Write a procedure to implement the Bresenham line generation algorithm. What are the advantages of this algorithm over the DDA line generation algorithm ? 8 Differentiate between the following : 2. 5 6 Graphics and Animation Drawing and painting What are the merits and demerits of Gourand Shading, constant shading and phong shading ? 3. (a) Explain all the four cases of Sutherland - Hodgman polygon clipping algorithm. MCS-053 2 6 5 Derive the 2-D transformation matrix for 10 reflection about the line y= mx + c, where m and c are constants. Use this transformation matrix to reflect the triangle A (0, 0), B (4, 0) and C (4, 4) about the line y = 2x + 5. Discuss different file formats used for multimedia applications. (a) Explain z-buffer algorithm for visible surface detection. 3 Explain the terms window and viewport in the context of clipping. Derive a general transformation matrix for window to viewport mapping. 8 Explain the following with suitable diagram : 4. 5 9 Ambient Reflection Diffuse Reflection Specular Reflection 5. (a) Obtain a transformation matrix for perspective projection for a given object projected onto x = 5 plane as viewed from [8, 0, 0]. MCS-053 3 8 P.T.O. (b) Differentiate between the following : 6 (i) Morphing and panning Motion Specific animation and Motion Generalised animation. (c) Given Po (1, 2), P 1 (2, 3), P 2 (4, 3), P3 (3, 2) as vertices of Bezier curve, determine 5 points on Bezier curve. 6

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Additional Info : Mca - III (sem 5) June 2010 Question Paper - Computer Graphics and Multimedia (Revised Course)
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