Computer Graphics Exam for Software Development and Computer Networking Students, Exams of Computer Graphics

Download Computer Graphics Exam for Software Development and Computer Networking Students and more Exams Computer Graphics in PDF only on Docsity! Cork Institute of Technology Bachelor of Science (Honours) in Software Development and Computer Networking – Award (NFQ Level 8) Summer 2006 Computer Graphics (Time: 2 Hours) Instructions Answer FOUR questions. All questions carry equal marks. Examiners: Ms. H. Fagan Dr. J. Buckley Dr. A. Kinsella Q1 (i) Write a display method for an openGL program that draws a two unit squares. The squares should be centred at (1,1) (-1,1) respectively. You should use a single method to draw the unit square. (8 marks) (ii) What code is required to set the projection plane so that all the above squares are visible? (4 marks) (iii) What code would you add so that all the squares rotate 5 degrees each time the ‘r’ key is hit? (6 marks) (iv) Describe with the aid of an example why you would use glPushMatrix and glPopMatrix in an openGL program? (7 marks) Q2. (i) Describe the three transformations that make up the window to viewport transformation and show how they are combined into a single matrix. (12 marks) (ii) What code would you add to an openGL program to guarantee that the viewport is always square? (6 marks) (iii) Explain what is meant by double buffering. Why is it used in animation? How would you modify an openGL program to use double buffering? (7 marks)