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Problem with Direct Input

Started by Blackstream Jul 7, 2005 at 7:40 PM 1 replies 850+ views

Original Post

Jul 7, 2005 at 7:40 PM

I doubt anyone will know what's going on, but I'm trying to get input with direct input. I get most keys just fine. Letter keys, function keys, whatever. But whenever I try to get the arrow keys, they are either considered always on, or always off, no matter what I press. It's really really weird.


I use this code to update my key array

if(FAILED(result = keyboard->GetDeviceState(256 * sizeof(char), (LPVOID)keys))) {
  if(FAILED(result = Acquire())) {
    return result;
  }

  if(FAILED(result = keyboard->GetDeviceState(256 * sizeof(char), (LPVOID keys))) {
    return result;
  }
}

And I use this code to check to see if a key is pressed
if(keys[key] & 0x80)
  return true;
else
  return false;

Where key would equal DIK_DOWN

Blackstream

Jul 7, 2005 at 9:09 PM

Still investigating the problem... it seems ALL my keys above a certain number don't work... like DIK_F12 and higher (by higher, I mean the actual value that dinput.h assigns to that macro) just do not work.

Blackstream

Jul 7, 2005 at 9:13 PM

And I solved my problem with that revelation a few seconds later when I realized I should use unsigned char instead of char for passing the key code to the function that checks to see if my key is pressed or not. In other words, anything above like 128 decimal got turned into a negative.

Stupid little silly bugs. It's funny how one keyword (or lackof) can have you scratching your head for hours.

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