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Flashcards in Homework1 Deck (20)
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1

Which type of light has an additional parameter for range?

point

2

What are the three specific kinds of light sources?

point lights, spot lights, and parallel lights

3

 

True or False

Light that strikes a surface point head-on is more intense that light that just glances a surface point.

True

4

What type of lighting is used to model indirect lighting?

ambient

5

What type of lights approximate a light source that is very far away?

directional

6

What is the term given to a unit vector that determines the direction a point on a surface is facing?

surface normal

7

True or False

Specular light travels in a particular direction, and when it strikes a surface, it reflects equally in all directions.

False

8

True or False

 

Specular light travels in a particular direction, and when it strikes a surface, it reflects sharply in one general direction, thereby causing a bright shine that can only be seen at some angles.

True

9

A __________normal is a unit vector that describes the direction a polygon is facing

face 

10

True or False

 

A good physical example of a parallel light is a flashlight.

false

11

The __________exponent controls the cone of reflectance and how shiny the surface of an object is.

specular exponent

12

Name the 3 different kinds of light emitted from a light source.

Ambient light

Diffuse light

Specular light

13

 You would use ________ light to model the direct lighting of relatively smooth surfaces.

specular

14

True or False

 The light vector is the vector from the surface to the light source and it is aimed in the same direction the light rays travel.

False

15

What type of lighting is used to model the direct lighting of relatively rough surfaces?

diffuse

16

A _________ light emits light in every direction.

point

17

True or False

 

Ambient light models indirect light that has scattered and bounced around the scene so many times that it strikes the object equally in every direction, thereby uniformly brightening it up.

True

18

__________can be thought of as the properties that determine how light interacts with a surface of an object.

Materials

19

A light bulb is a good example of a __________ light.

point

20

A good example of a _________ is a flashlight.

spotlight