BSCS Bachelor of Science in Computer Science: Computer Graphics Fundamentals Questions 5

Question 1

What is the purpose of a mipmap in texture rendering?

Accepted Answer

Pre-computed lower-resolution versions used to reduce aliasing for distant surfaces

Answer

Mipmaps are pre-filtered, progressively smaller texture images that reduce aliasing and improve performance when surfaces are small on screen.

Question 2

Which primitive is most commonly used as the fundamental rendering unit in real-time 3D graphics?

Accepted Answer

Triangle

Answer

Triangles are the universal rendering primitive because they are always planar, convex, and efficiently rasterized by modern GPU hardware.

Question 3

In global illumination, what does 'indirect lighting' refer to?

Accepted Answer

Light that has bounced off one or more surfaces before reaching a point

Answer

Indirect lighting accounts for light energy that has reflected off surfaces one or more times before contributing to the illumination of a point.

Question 4

What is the Sutherland-Hodgman algorithm used for?

Accepted Answer

Clipping a polygon against a convex clipping region

Answer

The Sutherland-Hodgman algorithm clips a polygon against each edge of a convex clip region successively, outputting the clipped polygon.

Question 5

What information does a vertex normal store in a 3D mesh?

Accepted Answer

The perpendicular direction to the surface at that vertex for lighting calculations

Answer

A vertex normal stores the averaged surface direction at a vertex, enabling smooth lighting interpolation across curved surfaces.

BSCS - Bachelor of Science in Computer Science Practice Test