Chapter 10

Question 1

2D graphics

Answer 1

deals with manipulating 2D images

Question 2

3D graphics

Answer 2

deals with producing and displaying images of three dimensional virtual scenes

• modeling,
• rendering.

Question 3

Modeling objects (methods)

Answer 3

• mathematical equations,
• Bezier curves and surfaces,
• procedural models

Question 4

Reflection

Answer 4

light rays bounce off surface

• specular light,
• diffuse light,
• ambient light

Question 5

Refraction

Answer 5

light rays penetrate the surface

Question 6

Clipping

Answer 6

restricts attention to objects within view volume

Question 7

Scan conversion or rasterization

Answer 7

associates pixel positions with points in the scene

Question 8

Shading

Answer 8

determines the appearance of points associated with pixels

Question 9

Local lighting model

Answer 9

does not account for light interactions between objects

Question 10

Global lighting model

Answer 10

accounts for light interactions between objects, for example using ray tracing.

Question 11

Animation

Answer 11

• Story board – sequence of sketches summarizing the entire animation.
• Frame – one of many images to create animation.
• Key frames – frames capturing the scene at specific points in time.
• In-betweening – producing frames to fill the gap between key frames.

Question 12

Dynamics (simulating motion)

Answer 12

applies laws of physics to determine positions of objects

Question 13

Kinematics (simulating motion)

Answer 13

applies characteristics of joints and appendages to determine positions of objects