Homework2

Question 1

A DirectInput ________ represents a physical object that can provide input to the computer.

Answer 1

device

Question 2

When sound waves reflect back from a solid object, it is know as a(n) ______

Answer 2

echo

Question 3

You use a ________ to get mutliple sounds to play at once.

Answer 3

mixer

Question 4

Name two types of buffers used with DirectSound. (This is meant to be an easy question, so keep it simple and state the obvious.)

Answer 4

primary and secondary

Question 5

Give one advantage to using DirectInput over standard API calls.

Answer 5

Win32 was not designed for games or speed

Win32 can’t support complex joysticks

Mouse support is limited to 3 buttons and 2 axes

Keyboard supports has stuff you don’t need

Message processing is slow

Question 6

All sounds have a(n) ___________________ and a(n) ________________________.

Answer 6

amplitude and frequency

Question 7

What are devices composed of?

Answer 7

Devices are composed of a set of objects, each one defining a button, axis, POV hat, etc.

Question 8

What version of DirectX did Microsoft introduce a component called DirectMusic, which allows applications to dynamically improvise music for games?

Answer 8

DirectX 6.1

Question 9

Sound waves are considered to be ___________ in nature.

Answer 9

sinusoidal

Question 10

What is the DirectInput keyboard constant for the Right-side Alt key?

Answer 10

DIK_RMENU

Question 11

What is the DirectInput keyboard constant for the Left-side Ctrl key?

Answer 11

DIK_LCONTROL

Question 12

What structure is used to setup the description of a DirectSound buffer?

Answer 12

DSBUFFERDESC

Question 13

_____________is measure in Hertz (Hz).

Answer 13

frequency

Question 14

Explain the concept of sound, in your own words.

Answer 14

magic, wizardry, waves of energy that are caused by movement of physical objects and can be interpreted either organically or electronically.

Question 15

A Directinput device represents a __________ object that can give input to the computer.

Answer 15

physical

Question 16

Name two ways to receive data from a device.

Answer 16

immediate and buffered

Question 17

The mouse and keyboard can have _________ which are classes that are notified when events happen.

Answer 17

listeners

Question 18

After successfully creating an IDirectInputDevice8 interface for a DirectInput device, what should be the first thing you do?

Answer 18

set the cooperative level

Question 19

True or False

The magnitude of sound defines how loud the sound is and is usually measured in decibels(dB).

Answer 19

False

Question 20

Direct Sound __________ are your main tools in DirectSound.

Answer 20

buffers