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hold back key

Started by Alexiev Aug 12, 2001 at 2:15 PM 1 replies 1k views

Original Post

Aug 12, 2001 at 2:15 PM

I don''t know how kan I make my heros move light. I just want to know how can I understand if key is press. Not to write from Keyboard buffer and wait 1/4 sec after first read from buffer. QBASIC, PASCAL, C, C++, VB, PERL,

GameDev135

Aug 14, 2001 at 9:39 AM

In C++, define these two macros at the top of the file:

#define KEYDOWN(vk_code) ((GetAsyncKeyState(vk_code) & 0x8000) ? 1 :0)
#define KEYUP(vk_code) ((GetAsyncKeyState(vk_code) & 0x8000) ? 0 : 1)

IMPORTANT- make sure that each macro fits onto 1 line.

Also make sure that you include:
#include <windows.h>
#include <windowsx.h>
#include <mmsystem.h>
#include <stdio.h>// i'm not sure if you actually need
#include <stdlib.h>// these last 3
#include <math.h>

then you can test for certain specific keys,
such as:
if (KEYDOWN(VK_UP )) {
//move character up
}
if (KEYUP(VK_UP)) {
// user released the up key
}
This only works for keys such as VK_SPACE, VK_RETURN, VK_F1, VK_UP, VK_DOWN, etc. (special keys). It doesnt work for regular keys like "a" or "b" I'm not actually sure how to do that. If anyone knows I would appreciate that.

Hope this helps

Dan

Edited by - GameDev135 on August 14, 2001 12:30:54 PM

Magicdude

Aug 14, 2001 at 9:59 AM

To check for keys like A and B, just use

  
if ( KEYDOWN( ''A'' ) )
   // Do stuff

easy eh

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