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Lighting and Shading (30 marks)
a. 6 marks: Briefly explain the properties of ambient, diffuse, and specular reflections, respectively.
b. 6 marks: We say that the diffuse shading is the primary information that gives the human eye a sense of shape and depth.
c. 4 marks: Describe the shininess control in the Phong Reflection Model.
d. 2 marks: Explain what the halfway vector is.
e. 2 marks: Given the following example, draw the halfway vector in the diagram.
f. 2 marks: What is the angle between the halfway vector and the surface normal?
g. 8 marks: Briefly explain the difference between Gouraud interpolated smooth shading and Phong Interpolated Smooth Shading in terms of computation and visual effect.