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Problems using KeyBoard Events ?

Started by Ngoles Mar 16, 2007 at 1:35 PM 2 replies 750+ views

Original Post

Mar 16, 2007 at 1:35 PM

Hi guys, I have a problem with this code in order to make a graphic move around the screen. The idea is to keep some of the arrows pressed, and make the graphic move, and when I release the key, the graphic should not move anymore. The thing is that it's not working. the only thing that works is when I press the SDLK_UP, then the graphic starts moving upwards... but it stops moving when I press SDLK_DOWN, not when I release SDLK_UP. See the piece of code at this link ( the ident went all wrong when pasting code here ) http://igoles.servebeer.com/code.c [Edited by - Ngoles on March 16, 2007 2:12:00 PM]

Mikle3

Mar 16, 2007 at 1:45 PM

Hmm although I can't understand exactly the problem you are getting, I would recommend you not to use the velocity system, but use SDL_GetKeyState to have continuous motion.

Ngoles

Author

Ngoles

Mar 16, 2007 at 2:15 PM

I edited the original post to try to make the problem clearer...

Do you have any tutorial about SDL_GetKeyState or something like that ? It would greatly help me :)

Thanks!

Mikle3

Mar 16, 2007 at 5:29 PM

The only tutorial I know of (without googling) is my breakout clone:

[source lang = "cpp"]Uint8 *pressedKeys = SDL_GetKeyState(NULL);//in the main game loop:    	while (!shouldQuit)	{		while (SDL_PollEvent(eventCurrent))		{                	if (SDL_KEYDOWN == eventCurrent->key.type)				pressedKeys = SDL_GetKeyState(NULL);          		if (pressedKeys[SDLK_LEFT])                        {                            //Do stuff                        }                 }        }

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