Multiple Key Board Keys

[krama757]

Hmm, Im trying to make a custom camera scene node and I think I found a prob with the engine...

Is there anyway to take input from two keys like W & A? From what I can see the engine only allows one key to be pressed at a time when using the IEvenetReceiver class.

[Conquistador]

Here's an event receiver class that I use, every time a key is pressed, a key in an array gets set to true, and you can handle the keypresses in the main loop:

CEventReceiver.h

Code: Select all

// Event Receiver Class
class CEventReceiver : public IEventReceiver
{
   public:
      CEventReceiver();
      virtual bool OnEvent(SEvent Event);
      bool getKeyState(EKEY_CODE key);
   private:
      bool keys[KEY_KEY_CODES_COUNT];
};

CEventReceiver.cpp

Code: Select all

// Include headers
#include "include/CEventReceiver.h"

// Constructor
CEventReceiver::CEventReceiver()
{
   for (int i = 0; i < KEY_KEY_CODES_COUNT; i++)
   {
      keys[i] = false;
   }   
}

// Event handler function
bool CEventReceiver::OnEvent(SEvent Event)
{
   if (Event.EventType == EET_KEY_INPUT_EVENT)
   {
      keys[Event.KeyInput.Key] = Event.KeyInput.PressedDown;
   }
   
   return true;
}

// Get key state
bool CEventReceiver::getKeyState(EKEY_CODE key)
{
   return keys[key];   
}

In your main loop, handle keypresses like so:

Code: Select all

if (EventReceiver->getKeyState(KEY_KEY_A))
{
    // Do something
}

[/code]

[krama757]

Thats a nice way of doing it. I thought it was a prob with the engine itself...thanks a bunch.

However, does your FPS camera work?

[MikeR]

Is there anyway to take input from two keys like W & A?

Yes.

Code: Select all

if (EventReceiver->getKeyState(KEY_KEY_A && KEY_KEY_W)) 
{ 
    // Do something 
} 

[Conquistador]

However, does your FPS camera work?

Actually, no it doesn't, for me anyways. I'm gonna take a look at that sometime later. If you want, maybe try this:

Code: Select all

// Event handler function
bool CEventReceiver::OnEvent(SEvent Event)
{
   if (Event.EventType == EET_KEY_INPUT_EVENT)
   {
      keys[Event.KeyInput.Key] = Event.KeyInput.PressedDown;
      return true;
   }
   
   return false;
} 

[r3i]

Sorry....a curiosity: and if I want to detect the click of due the mouse buttons??
Is correct try with "getKeyState" ?

[Conquistador]

No, you'd have to do basically the same thing I did with the keyboard, except make an array of mouse keys, and every time a mouse button is down, set a key in the array to true, every time it is lifted, set the array key back to false. If you want to do that, you should make the method return a position2d<> with the coords of the last mouse click.

[r3i]

Ok thank ou,
I don't know but i've problems because I've get to left button and right button some actions... i must try: thank you! ^.^

[krama757]

Yep, already tried that Conquistador, doesnt seem to help. I was trying various other methods to no avail.

Mike, thanks, but already knew that lol

[SARIN]

try http://irrlicht.sourceforge.net/phpBB2/ ... t=key#4525
it may help