Homework3

Question 1

What does a RAW file contain?

Answer 1

RAW files simply contain the bytes of the image one after another.

Question 2

What is the program Terragen used for?

Answer 2

a program used to generate heightmaps procedurally that provides tools for modifiying heightmaps

Question 3

True or False

Blend maps are embedded into the alpha channels of color maps.

Answer 3

False

Question 4

You can use a __________ filter to smooth out rough edges of a heightmap.

Answer 4

blur

Question 5

You use a(n) _________ to describe hills and valleys in a terrain.

Answer 5

heightmap

Question 6

After you finish creating your heightmap, in what format should you save it (according to the book)?

Answer 6

8-bit RAW file

Question 7

In what two ways can heightmaps be generated?

Answer 7

procedurally with a program like Terragen or in an image editor such as Photoshop

Question 8

True or False

When using a heightmap you can only apply one single texture to the entire heightmap.

Answer 8

False

Question 9

Why can RAW files be easily read in a block of memory with one std::ifstream::read call?

Answer 9

Because a RAW file is nothing more than a contiguous block of bytes (where each byte is a heightmap entry).

Question 10

What are blend maps used for?

Answer 10

when blending layers, it is used to control the amount each layer contributes to the final terrain image