Deck 10: Computer Graphics

Question 1

Which of the following is not a step in the traditional rendering pipeline?

A) Scan conversion
B) Rasterization
C) In-betweening
D) Clipping

Answer 1

C

Question 2

A polygonal mesh consists of

A) Planer patches
B) Pixels
C) Spheres
D) Bezier curves

Answer 2

A

Question 3

Which is not a feature of radiosity?

A) Objects tend to appear dull rather than shiny.
B) Moving the camera position does not require massive changes.
C) Specular light is easily simulated.
D) It is a computationally complex undertaking.

Answer 3

C

Question 4

Which of the following is not a way of constructing a polygonal mesh?

A) Digitizing
B) Procedural model
C) Texture mapping
D) Particle system

Question 5

Which of the following is the simplest shading technique?

A) Phong shading
B) Flat shading
C) Gouraud shading
D) Bump mapping

Question 6

Motion capture is a means of applying

A) A global lighting model
B) A local lighting model
C) Dynamics
D) Kinematics

Question 7

Which of the following is not associated with scan conversion?

A) A z-buffer
B) The painter's algorithm
C) Digitizing
D) Pixel positions

Question 8

Which of the following is not a property of the rendering pipeline?

A) It relies on recursive ray tracing.
B) It implements a local lighting model.
C) It is often implemented in firmware.
D) Its use leads to efficient rendering systems.

Question 9

Which of the following is associated with clipping?

A) Phong shading
B) The view volume
C) Texture mapping
D) Bump mapping

Question 10

Which of the following is not associated with a parallel projection?

A) Projection plane
B) Projectors
C) Center of projection
D) All of the above

Question 11

Hidden-surface removal is the process of

A) Discarding those objects that fall outside the view volume
B) Applying a parallel projection rather than a perspective projection
C) Identifying parts of surfaces that are in a shadow
D) Identifying surfaces that are blocked from the camera's view

Question 12

The shape of an object is usually represented by

A) A sphere
B) A polygonal mesh
C) A triangle
D) A texture map

Question 13

The image is stored in the

A) Image window
B) Z-buffer
C) Center of projection
D) Frame buffer

Question 14

Which of the following is not naturally handled by a local lighting model?

A) Specular light
B) Diffuse light
C) Ambient light
D) Shadows

Question 15

The incidence angle is measured relative to

A) The line normal to the surface
B) A line parallel to the surface
C) The line followed by the reflected ray
D) None of the above

Question 16

Producing a sequence of frames to fill the gap between key frames is called

A) Storyboarding
B) Morphing
C) In-betweening
D) Motion capture

Question 17

Which of the following is not contained in a scene graph?

A) Models of the objects in the scene
B) Information about the camera
C) Information about lighting
D) The view volume

Question 18

Another name for scan conversion is

A) Rasterization
B) Digitizing
C) Bump mapping
D) Ray tracing

Question 19

The phenomenon of a light ray bending as it passes through materials of different density is called

A) Reflection
B) Incidence
C) Refraction
D) Ray tracing

Question 20

Which of the following is an advantage of ray tracing over the traditional rendering pipeline?

A) It is less time consuming.
B) It implements a local lighting model.
C) It can be implemented in real time.
D) It implements a global lighting model.

Question 21

The shape of an object is typically represented by means of a ____________,which represents the shape as a collection of flat surfaces.

Question 22

A _________ is a procedural model that uses numerous small particles to simulate an object.

Question 23

Bright highlights on an object are produced by __________ light.

Question 24

Although __________ implements a global lighting model,it is time consuming and gives undue emphasis to specular light.

Question 25

Although __________ implements a global lighting model,it is time consuming and gives undue emphasis to diffuse light.

Question 26

A line perpendicular to a surface is called a __________.

Question 27

An animation project usually starts by constructing a _________,which consists of a collection of images that represent significant points in the sequence.

Question 28

Another name for scan conversion is ____________.

Question 29

The subfield of computer graphics that involves producing images of virtual worlds is called _______.

Question 30

Suppose each row below represents the vertices of a planar patch.What three vertices would describe a planar patch that would complete the polygonal mesh?
_________ __________ _________
(0,0,0) (1,0,0) (0,0,1)
(0,0,0) (0,1,0) (0,0,1)
(0,0,0) (0,1,0) (1,0,0)

Question 31

Clipping is the process of restricting attention to objects (or parts of objects)that are within the ___________.

Question 32

An alternative to flat shading is ______________.

Question 33

The ________ algorithm is a simple approach to performing hidden-surface removal.

Question 34

The steps of clipping,hidden-surface removal,and shading are often referred to collectively as the _______________.

Question 35

The shading technique called __________ produces a faceted image.

Question 36

The modeling process concludes with the construction of a ______________,which is a data structure containing models of all the objects in a scene as well as camera information.

Question 37

A storage area called a __________ is often used to record distance information to be used in hidden-surface removal.

Question 38

The ____________ represents the portion of the projection plane that will contribute to the final image.A bit map of that image is stored in the ___________.

Question 39

Avars are used to

A) Adjust a character's shape
B) Simulate textured surfaces
C) Locate objects in a scene graph
D) Reposition the camera

Question 40

Each of the images used to produce an animated sequence is called a _________.

Question 41

Compare various approaches to shading.

Question 42

Summarize the rendering pipeline.

Question 43

Producing animation frames by computing the effects of forces is an application of __________.

Question 44

Producing animation frames by simulating the movements of joints and appendages is an application of ___________.

Question 45

Compare the application of dynamics and kinematics in the field of animation.

Question 46

Discuss some fundamental differences between the process of constructing models and assembling a scene graph as opposed to rendering the scene.

Question 47

Design a polygonal mesh for a cube.Represent each planar patch as a list of vertices in traditional rectangular coordinates.