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IGLOBAL UNIVERSITY

IT 473 Interactive Computer Graphics

Midterm Exam (Online – Spring 2020)

Answer all questions. Upload a PDF document with your answers. Please write clearly. Use extra paper as needed – clearly indicating the question being answered.

1. T/F: 2D graphics are displayed representation of a scene or an object along two axes of reference: height, width, and depth (x, y, and z). (2 points)

True False

2. T/F: 3D Graphics are displayed representation of a scene or an object that appears to have three axes of reference: height, width, and depth (x, y, and z). (2 points)

True False

3. T/F: Short form for “picture element.” A pixel is the smallest element of a graphics display or the smallest element of a rendered image. (2 points)

True False

4. T/F: In full-color systems, there are 24 (or more) bits per pixel. They are also called true-color systems. (2 points)

True False

5. What is a CUP, GPU? (5 points)

6. What is ‘A raster’ (rasterization)? (5 points)

7. Window coordinates are measured in units of pixels on the display but retain depth information. If we remove the depth coordinate, we are working with two-dimensional ___________________________ ____________________________. (5 points)

8. RGB and CYMK are examples of _______________________________. (5 points)

9. What graphics concept is depicted in the figure below? Explain. (5 points)

10. Compare and contrast the human eye and a camera. (5 points)

11. Describe Chroma Keying. (5 points)

12. Identify the parent computer language shown below. What is the purpose of … (5 points)

13. The translation factor for ABC to A’B’C’ is tx = 6 and ty = 6. Draw the original triangle and new triangle. Show all calculations and draw to scale on the graph to the right.

A = (3,6) B = (4,4) C = (1,2)

(10 Points)

14. The translation factor for ABC to A’B’C’ is tx = 1.5 and ty = 1.5. Draw the original triangle and new triangle. Show all calculations and draw to scale on the graph to the right.

A = (12,5) B = (8,9) C = (3,9)

(10 Points)

15. The scale factor for ABC to A’B’C’ is 2. Draw the original triangle and new triangle. Show all calculations and draw to scale on the graph to the right.

A = (3,6) B = (4,4) C = (1,2)

(10 Points)

16. The scale factor for ABC to A’B’C’ is 0.5. Draw the original triangle and new triangle. Show all calculations and draw to scale on the graph to the right.

A = (12,5,0) B = (8,9,0) C = (3,9,0)

(10 Points)

17. What is the scaling factor for the triangles in the figure shown below? Show all calculations. (3 Points)

18. Matrix:

18a. (3 Points)

=

18b. (3 Points)

=

18c. Evaluate P2? (3 Points)

19. Research Question (50 Points)

19a. Explain the matrix used to rotate an object. Develop the equations.

19b. Rotate the triangle (0,0)(1,0)(1,1) anticlockwise and clockwise. Draw the original and final locations on a graph.

Midterm Exam (Online – Spring 2020)