Revision as of 04:47, 9 February 2009

Class 3 Input Handling

Input

input from Game Controller and Keyboard

GamePad

XNA has built in support for up to 4 game controllers. The default controller is a x-box controller. X-Box Controller The Controller is accessed through the GamePad Object and the GamePadState Structure reference types <csharp>

        //Get and instance of the gamePadState Structure
        GamePadState gamePad1State = GamePad.GetState(PlayerIndex.One); 
        

/*Since the Keyboard structure is Windows only we need to use some preprocessor directives to only compile the KeyBoard state code if the target is not XBOX360 (I should also add zune if this is one of our build targets)

• /

        #if !XBOX360
           #region KeyBoard
           KeyboardState keyboardState = Keyboard.GetState();
        #endif
        

</csharp>

Angle Measured in Radians

using atan2 to get the angle from the direction vector

Vibration

<csharp>

       GamePad.SetVibration(PlayerIndex.One, 1.0f, 1.0f);  //left low freq motor right high freq motor
       

</csharp>

Classes and Generics

Shooting with pacman

List<Type> Safer than Arraylist and easier to manage than Array

in class

Extract sprite from pacman class and build new project

Sprite class

IntroPacManComponent.zip

Project that refactors the pacman class into two classes

Sprite.cs DrawableSprite.cs

Then the pacman class can inherit from one of these two classes.

PacMan.cs

Due to the desire to limit the number of spritebatches, I've created two classes. The sprite class cannot draw itself without being associated with and external spritebatch. The DrawableSprite has it's own spritebatch which makes it easier to use but less efficient.

Homework

• Create an XNA project that uses the Keyboard for input.

• Read Chapter 3 in XNA 3.0