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DirectInput Problems from hell

Started by cxi2 Oct 2, 2000 at 12:08 PM 2 replies 200+ views

Original Post

Oct 2, 2000 at 12:08 PM

ok I am going to hang myself soon if I dont get this simple procedure correct, PLEASE HELP All I want me program to do is PAUSE until a user presses the enter key. I am using DX7 and Direct INPUT . I set the cooperative level, and acquire the keyboard... then my code goes somewhat like this: unsigned long ITemData; ItemData = 64; DIDEVICEOBJECTDATA Sarray[64]; Keyboard->GetDeviceData(sizeof(DIDEVICEOBJECTDATA), sArray, &ItemData); While (!(bob == 1)){ for(int i = 0; i > 64; i++){ if( Sarray.OFs = DIKS_RETURN){ bob = 1; } }// end for loop } I have tried sticking the Keyboard->GetDeviceData line in the while loop. what happens either way is that the program just hangs and accepts no input... I guess I dont have a clue how this works... can someoen show me some source for making the damn program pause until a key is pressed??????? thanks p.s. I tried getch()... doesnt work for some reason.... thanks all to Code, or Not To Code

DekuTree64

Oct 2, 2000 at 2:13 PM

Here''s my input function (mostly just copied from the SDK samples...):

    void ProcessKeyboard(void)
{
	#define KEYDOWN(name, key) (name[key] & 0x80)

	char buf[256];
	HRESULT hr = DIERR_INPUTLOST;

	while(hr == DIERR_INPUTLOST)
	{
		hr = lpDIKB->GetDeviceState(sizeof(buf), (LPVOID)&buf);
		if(hr == DIERR_INPUTLOST)
		{
		hr = lpDIKB->Acquire();
		if(SUCCEEDED(hr))
			break;
		}
	}
	if(SUCCEEDED(hr))
	{
		//check keys, do stuff.
	}
}[/source]

(hope I did that source thing right)
I''ve never really used it though, so it could probably use some improvement. Mainly making buf[] global, so other functions can check if keys are down, in which case the key checking part shouldn''t need to be there. 
So basically, just make it look lke this:
[source]#define KEYDOWN(name, key) (name[key] & 0x80)
char buf[256];

void ProcessKeyboard(void)
{
	HRESULT hr = DIERR_INPUTLOST;

	while(hr == DIERR_INPUTLOST)
	{
		hr = lpDIKB->GetDeviceState(sizeof(buf), (LPVOID)&buf);
		if(hr == DIERR_INPUTLOST)
		{
		hr = lpDIKB->Acquire();
		if(SUCCEEDED(hr))
			break;
		}
	}
}

So just make a while loop, call ProcessKeyboard, and ckeck if enter is down, if so, exit the loop^^

-Deku-chan

DK Art (my site, which has little programming-related stuff on it, but you should go anyway^_^)

"I'm dropping like flies!" - me, playing Super Smash Bros. (and losing)
"What fun!" - me, playing Super Smash Bros. (and beating the crap out of somebody)

furby100

159

furby100

Oct 2, 2000 at 2:56 PM

You remembered to ->SetDataFormat(&c_dfDIKeyboard), I hope. Well, you want something like this:

    
unsigned char keystate[256];

Keyboard->GetDeviceState(256, keystate);
while(keystate[DIK_RETURN] & 0x80);

This is how I do it, I''ll give you a full example if you wish.

------------------------------
#pragma twice

sharewaregames.20m.com

cxi2

Author

cxi2

Oct 2, 2000 at 3:02 PM

sweet thanks guys... furby1000 wouldnt I want it to be like this:

unsigned char keystate[256];
Keyboard->GetDeviceState(256, keystate);
while(!(keystate[DIK_RETURN] & 0x80)){

// do stuff

}

? cuz I want the loop to continue forever unless the return key is hit...
maybe I dont understand the way the thing works: is the & 0x80 meaning that the key is up or down????

thanks guys

to Code, or Not To Code

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