key press

[JBGame]

Hey,

how would i make receiver.IsKeyDown , so that it can only be pressed once? if you get me..because when i do receiver.IsKeyDown(KEY_KEY_W), pressing the W key is like pressing it 10+ times even when i just pressed it once.
I know with GetAsyncKeyState you can do:

Code: Select all

If(GetAsyncKeyState(0xWHATEVER) & 1)
{

}

[Nalin]

Keep a key state:

Code: Select all

// Create a key state that contains all the possible keys.
bool key_state[irr::KEY_KEY_CODES_COUNT];
...
// Set all the values in the key state to false.
memset((void*)key_state, 0, sizeof(bool) * irr::KEY_KEY_CODES_COUNT);
...
bool CGameEventReceiver::OnEvent(const SEvent& event)
{
	switch (event.EventType)
	{
		case irr::EET_KEY_INPUT_EVENT:
		{
			// Alter our key state.  If the key is pressed, it sets the state to true, else if it is released, it will be set to false.
			key_state[event.KeyInput.Key] = event.KeyInput.PressedDown;
		}
	}
}
...
// Check and see if the A key is pressed.
if (key_state[irr::KEY_KEY_A]) doStuff();

[JBGame]

Hi,

i don't think you get what i'm trying to say(sorry can't explain it properly..)

i'm using:

Code: Select all

class MyEventReceiver: public IEventReceiver { 
public: 
   // This is the one method that we have to implement 
   virtual bool OnEvent(const SEvent& event) { 
      // Remember whether each key is down or up 
      if (event.EventType == irr::EET_KEY_INPUT_EVENT) 
         KeyIsDown[event.KeyInput.Key] = event.KeyInput.PressedDown; 

      return false; 
   } 

   // This is used to check whether a key is being held down 
   virtual bool IsKeyDown(EKEY_CODE keyCode) const { 
      return KeyIsDown[keyCode]; 
   } 

   MyEventReceiver() { 
      for (u32 i = 0; i < KEY_KEY_CODES_COUNT; ++i) 
         KeyIsDown[i] = false; 
   } 

private: 
   // We use this array to store the current state of each key 
   bool KeyIsDown[KEY_KEY_CODES_COUNT]; 
}; 

and using:

Code: Select all

if(receiver.IsKeyDown(KEY_KEY_W))
{
print("TEST");
}

When i JUST press the W key ONCE, it will act as if i've held down the W key, and i want to know how to stop this.

[Sylence]

Release the key faster

When you just want to have one action when the key is pressed then check for the key release event and put your logic there.

[no_response]

i would do

Code: Select all

bool keypressed = receiver.IsKeyDown(KEY_KEY_W);
...


while(device->run()){
...
...

if(!keypressed){
if(receiver.IsKeyDown(KEY_KEY_W)){ print("TEST");}
keypressed = 1;
}
else{
keypressed = receiver.IsKeyDown(KEY_KEY_W);
} 

...
...
}

lol...

[cobra]

Code: Select all

if(event.KeyInput.Key == KEY_KEY_W && event.KeyInput.PressedDown == false)
{
       doSomething();
}

[Joshee23]

Thnak you very much guys for the information you posted..
It really helps me a lot...
Newbie here seeking for Knowledge and friends too...
Godspeed,,,how to deal with depression

[JBGame]

Hi,

thanks guys, got it to work