IT473: Interactive Computer Graphics

* multiple choice 

1 In DDA: If the slope of a line is zero. the line is said to be _____________

A. Infinite

B. 45 degrees of x and y

C. Parallel to the x axis

D. Parallel to the y axis

2 What is the difference between mixing light and mixing paint/pigments?

Select all that apply

A. Mixing pigments is difficult and messy

B. Mixing paint is about absorption and reflection

C. Mixing light together is simple addition

D. Mixing light is about absorption and reflection

Question  3 Use DDA to draw a line from (15, 2) to (7, 7).  

a. How many points will be needed to generate such a line? Show detailed calculations.  (10 Points)

b. Plot the graph - shade the pixels. (5 Points)

Answer both sections of the question.

Include/Upload the answer as an image if necessary.