Problem with keyboard Input.

This is a discussion on Problem with keyboard Input. within the Game Programming forums, part of the General Programming Boards category; Hi everybody... happy thanksgiving! Here is my problem. I am making this classic game, a clone of asteroids you could ...

  1. #1
    Registered User actionbasti's Avatar
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    Dec 2002
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    48

    Problem with keyboard Input.

    Hi everybody...
    happy thanksgiving!

    Here is my problem. I am making this classic game, a clone of asteroids you could say. Well you controll an aircraft, view from top and you shoot at enemies that come at you from top of the screen.
    If you play the game, then you will recognize that the control doesnt work all the way. Its possible to manuver in all directions( using arrow keys); however if you press the spacebar to shoot the laser, then all directions work except the upper left.

    So, pressing space, left, and up at the same time doesnt work. Can anyone help me figure out why?

    Code:
    void HandleKeys()
    {
    	
        if (GetKeyState(VK_RIGHT) < 0)
    		strider.posX = strider.posX + 4;
    	if (GetKeyState(VK_LEFT) < 0)
    		strider.posX = strider.posX - 4;
        if (GetKeyState(VK_UP) < 0)
    		strider.posY = strider.posY - 4;
    	if (GetKeyState(VK_DOWN) < 0)
    		strider.posY = strider.posY + 4; 
    }
    To better understand, here is the complete source code for .NET c++
    thank you!
    Attached Files Attached Files

  2. #2
    Registered User
    Join Date
    Jun 2003
    Posts
    17
    I'm using visual c++ 6 so I can't run the program to my knowledge without an executable because I don't know what lib file to include.

    But instead of

    Code:
    if (GetKeyState(VK_RIGHT) < 0)
    try for all the if statements

    Code:
    if(GetAsyncKeyState(VK_RIGHT))
    this will return a true or false value

    This may not work, but it's worth a try.

  3. #3
    Registered User actionbasti's Avatar
    Join Date
    Dec 2002
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    48
    Originally posted by Jontay
    I'm using visual c++ 6 so I can't run the program to my knowledge without an executable because I don't know what lib file to include.
    I include the following lib file to make transparancy work:
    msimg32.lib


    Originally posted by Jontay
    Code:
    if(GetAsyncKeyState(VK_RIGHT))
    I Started With GetAsyncKeyState(VK_...), so that is not the problem either!

    I tried the game on several computers and everywhere its the same, so I realy dont know what it could be! :-( help!!

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