Game Programming Class3

Class 3 Input Handling

Inclass Keyboard input demo

KeyboardState keyboardState = Keyboard.GetState();

Explore Limitations of Built in Keyboard state.

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 an 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

IntroSimpleSpriteUpdateRotateWindows Project

SpriteJump Project

Input Error missing DirectX9

Error:An unhandled exception of type 'System.DllNotFoundException' occurred in SharpDX.XInput.dll Additional information: Unable to load DLL 'xinput1_3.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E)

  XInput library may be missing if you have a fresh install of win8.1 or 10

Solution: Install DirectX 9 Runtime http://www.microsoft.com/en-us/download/confirmation.aspx?id=8109 or http://www.microsoft.com/en-us/download/details.aspx?id=35

Unity Basics and Movement

Demo add Art and setup folders

Movement script

parameter <csharp> public Vector3 Direction = new Vector3(1, 0, 0);

   public float Speed = 5;

</csharp> Update <csharp> void Update () {

       //Move Pacman
       this.transform.position += this.Direction * this.Speed * Time.deltaTime;

} </csharp>

Full Script with wall bouncing <csharp> using UnityEngine; using System.Collections;

public class SimpleMove : MonoBehaviour {

   public Vector3 Direction = new Vector3(1, 0, 0);
   public float Speed = 5;

   static Vector3 cameraBottomLeft; //calculate camera left
   static Vector3 cameraTopRight; //calculate camera top
   static Rect cameraRect; //rectangle for camera

   // Use this for initialization

void Start () {

       cameraBottomLeft = Camera.main.ScreenToWorldPoint(Vector3.zero);
       cameraTopRight = Camera.main.ScreenToWorldPoint(new Vector3(
           Camera.main.pixelWidth, Camera.main.pixelHeight));

       cameraRect = new Rect(
           cameraBottomLeft.x,
           cameraBottomLeft.y,
           cameraTopRight.x - cameraBottomLeft.x,
           cameraTopRight.y - cameraBottomLeft.y);

}

// Update is called once per frame void Update () {

       //Move Pacman
       this.transform.position += this.Direction * this.Speed * Time.deltaTime;

       if (!cameraRect.Contains(this.transform.position))
       {
           //keep  on screen
           if (this.transform.position.x <= cameraRect.xMin)
           {
               
               this.Direction.x *= -1;
           }
           if (this.transform.position.x >= cameraRect.xMax)
           {
               
               this.Direction.x *= -1;
           }
           if (this.transform.position.y > cameraRect.yMax)
           {
               
               this.Direction.y *= -1;
           }
           if (this.transform.position.y < cameraRect.yMin)
           {
               
               this.Direction.y *= -1;
           }
           
       }

} } </csharp>

and Input from keyboard <csharp> using UnityEngine; using System.Collections;

public class SimpleInput : MonoBehaviour {

   public Vector3 Direction;
   public float Speed;
   public Vector3 keyDirection;
   
   // Use this for initialization

void Start () {

}

// Update is called once per frame void Update () {

       //input
       //direction.x = direction.y = 0;
       keyDirection.x = keyDirection.y = 0;

       //Keyboard
       if (Input.GetKey("right"))
       {
           keyDirection.x += 1;
       }
       if (Input.GetKey("left"))
       {
           keyDirection.x += -1;
       }

       if (Input.GetKey("up"))
       {
           keyDirection.y += 1;
       }
       if (Input.GetKey("down"))
       {
           keyDirection.y += -1;
       }

       Direction += keyDirection;
       Direction.Normalize();

       //Move Pacman
       this.transform.position += this.Direction * this.Speed * Time.deltaTime;

} } </csharp>

Homework

Moving Game 2 Interesting movement

Update your moving assigment to make the movement more interesting. Use more than 1 input method ie Keyboard, xbox controller, mouse etc.

Extra Credit

• Sprite Class

Build a class that is reusable that can draw a single texture on the screen. Be sure to encapsulate all the properties and method that you need to draw the sprite.

• Create an XNA project that uses the Keyboard for input.
• Has at least 3 different moving sprite with a common code base.
• the sprites should inherit from the same class. Game components are a plus. don't worry about collision yet

Repo URL https://iam.colum.edu:8443/svn/GPMonogame3/trunk/SP15