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[C++ SDL] SDLK_Æ, Ø and Å?

 
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NothingToShow
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PostPosted: Fri Apr 09, 2010 8:31 am    Post subject: [C++ SDL] SDLK_Æ, Ø and Å? Reply with quote
Heya.
I've recently got me a N900 and loving it.
I made up my mind to make a little snake game for it, but I have a little problem:
The controls has to be period (.) as left, left button (<-) as down, right button (->) as right and Æ as up.
Reason for that, is because of the design of the keyboard on the n900.
EDIT:
Screenshot of the european one, and US.


So here is my keyboard event handling:
Code:
            case SDLK_UP:
               if (direction != Down)
                  direction = Up;
                  break;
            case SDLK_DOWN:
               if (direction != Up)
                  direction = Down;
                  break;
            case SDLK_RIGHT:
               if (direction != Left)
                  direction = Right;
                  break;
            case SDLK_ae: //Doesn't work
               if (direction != Right)
                  direction = Left;
                  break;


Any idea what to do?
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Dark Byte
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PostPosted: Fri Apr 09, 2010 9:06 am    Post subject: Reply with quote
you could try going with the wasd controls instead like many other games....
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NothingToShow
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PostPosted: Fri Apr 09, 2010 9:11 am    Post subject: Reply with quote
Dark Byte wrote:
you could try going with the wasd controls instead like many other games....

I just used that for testing on the device, but imo, it doesn't feel right.
But of course that would be the best way until I add a way to remap the keys.
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Slugsnack
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PostPosted: Fri Apr 09, 2010 9:18 am    Post subject: Reply with quote
to remap the keys, simply add a handler for the key you are interested in. when processing that event, emulate another event that is for the key you are trying to map it to. i'm not sure what api you're using but to make it relevant, if you were doing windows programming, you'd do a sendmessage at that point
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Deltron Z
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PostPosted: Fri Apr 09, 2010 10:22 am    Post subject: Reply with quote
I had the same problem on my laptop, appreantly Fn was locked.

Quote:
2. Secondary keys (Symbols/Numbers Row)

To access the alternative keys, e.g. on “D “we have “#” press

Alt and the symbol, e.g “Alt” and “D” we get #

or

Alt twice

you should see “Fn is locked”

So try to press Alt key twice to toggle the lock and then try to use the arrow keys. (or maybe another lock-key, check in here)
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NothingToShow
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PostPosted: Fri Apr 09, 2010 3:11 pm    Post subject: Reply with quote
Deltron Z:
That isn't really my problem: My problem is I dunno how to make SDL check for the "æ" button to be pressed (:
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Dark Byte
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PostPosted: Fri Apr 09, 2010 5:17 pm    Post subject: Reply with quote
Follow the sdk for SDLK_RIGHT and look around there. Perhaps you can find a definition that fits.

Alternatively, try coding a keypress to value app, and then get the key value to look for
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NothingToShow
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PostPosted: Sun Apr 11, 2010 2:07 pm    Post subject: Reply with quote
While developing a little more on the game, I've managed to make myself another problem:
Segmentantion Fault
Could anyone point out what is causing that?

Source Code:
Code:
#include <stdlib.h>

#include <SDL/SDL.h>
#include <SDL/SDL_image.h>
#include <time.h>

#define N 500 /*snake length*/
#define W 1000
#define NODESIZE 10 /*node height & width*/
#define WINSIZE 400 /*window height & width*/ //NOT USED! LOOK AT THE 2 BELOW
#define WINSIZEW 800
#define WINSIZEH 480

typedef enum {Up, Down, Right, Left}TDirection; //Possible directions

SDL_Surface* screen = NULL;
SDL_Surface* Table[N] = {NULL};
SDL_Surface* blank;
SDL_Surface* puce; //Snake puce

SDL_Rect Tabpos[N], ppuce, Wallpos[W];

bool running = true;
int NodeCounter;
TDirection direction;
SDL_TimerID timer;

Uint32 Anime_it (Uint32, void *);
int snakeColl(void);
void Quitter(void); //will be executed when exiting
void SetPos(void);
void MoveSnake(void);
void Show(void);
void PurgeScreen(void);
void SetPuce(void);
void Lose(void);
void freeNodes(void);
void AddNode(void);

int main (int argc, char** argv)
{
   Uint32 speed; //game speed
   SDL_Event event;
   int done;
   int i;
   srand (time(NULL));
   //INITIALIZE
   i = SDL_Init(SDL_INIT_VIDEO|SDL_DOUBLEBUF|SDL_INIT_TIMER);

   if (i < 0){
      exit(EXIT_FAILURE);
   }

   atexit (Quitter);
        screen = SDL_SetVideoMode(WINSIZEW, WINSIZEH, 16, SDL_HWSURFACE);
   
   if (screen == NULL){
      exit(EXIT_FAILURE);
   }

   SDL_WM_SetCaption("SimpleSnake", NULL);
   //Initialisations
   speed = 60;
   //done = 1;
   NodeCounter = 10;
   direction = Right;
   Table[0] = SDL_CreateRGBSurface(SDL_HWSURFACE, NODESIZE, NODESIZE, 16, 0, 0, 0, 0);
   SDL_FillRect(Table[0], NULL, SDL_MapRGB(Table[0]->format, 0, 255, 0));
   Tabpos[0].x = screen->w/2;
   Tabpos[0].y = screen->h/2;

   for (i = 1; i < NodeCounter; i++){
      Table[i] = SDL_CreateRGBSurface(SDL_HWSURFACE, NODESIZE, NODESIZE, 16, 0, 0, 0, 0);
      SDL_FillRect (Table[i], NULL, SDL_MapRGB (Table[i]->format, 0, 0, 0));
      Tabpos[i].x = Tabpos[i-1].x - NODESIZE;
      Tabpos[i].y = screen->h/2;
   }

   SDL_ShowCursor(0);

   Show();
   SDL_Flip(screen);
   timer = SDL_AddTimer(1, Anime_it, &speed);
   SetPuce();

   while (running){
   SDL_WaitEvent(&event);
   
   switch (event.type){
      case SDL_QUIT:
         running = false;
         break;
      case SDL_KEYDOWN:
         switch (event.key.keysym.sym){
            case SDLK_w:
               if (direction != Down)
                  direction = Up;
                  break;
            case SDLK_s:
               if (direction != Up)
                  direction = Down;
                  break;
            case SDLK_d:
               if (direction != Left)
                  direction = Right;
                  break;
            case SDLK_a:
               if (direction != Right)
                  direction = Left;
                  break;
            case SDLK_u: //INCREASE SPEED
               if ((speed-5)>0)
                  speed -= 5;
                  break;
            case SDLK_l: //DECREASE SPEED
               if ((speed+5)<100)
                  speed += 5;
                  break;
            case SDLK_q:
               Quitter();
               break;
         }
         break;
      }//SWITCH
   } //WHILE
   
   return 0;
}

void MoveSnake()
{
   switch (direction){
      case Up:
      if ((Tabpos[0].y - NODESIZE) >= 10)
         Tabpos[0].y -= NODESIZE;
      else
         Lose();
         //Tabpos[0].y -= NODESIZE;
         break;
      case Down:
      if ((Tabpos[0].y + NODESIZE) < (screen->h - 10))
         Tabpos[0].y += NODESIZE;
      else
         Lose();
         //Tabpos[0].y += NODESIZE;
         break;
      case Right:
      if ((Tabpos[0].x + NODESIZE) < (screen->w - 10))
         Tabpos[0].x += NODESIZE;
      else
         Lose();
         //Tabpos[0].x += NODESIZE;
         break;
      case Left:
      if ((Tabpos[0].x - NODESIZE) >= 10)
         Tabpos[0].x -= NODESIZE;
      else
         Lose();
         //Tabpos[0].x -= NODESIZE;
         break;
   }

   /*if ((Tabpos[0].x == WINSIZEW ))
      Tabpos[0].x = 0;
   else if ((Tabpos[0].x == 0))
      Tabpos[0].x = WINSIZEW;
   else if ((Tabpos[0].y == WINSIZEH))
      Tabpos[0].y = 0;
   else if ((Tabpos[0].y == 0))
      Tabpos[0].y = WINSIZEH;*/

   if ((Tabpos[0].x == ppuce.x) && (Tabpos[0].y == ppuce.y))
      AddNode();

   if (snakeColl())
      Lose();
}

void SetPos(void)
{
   int i;

   for (i = (NodeCounter-1); i>0; i--)
   {
      Tabpos[i].x = Tabpos[i-1].x;
      Tabpos[i].y = Tabpos[i-1].y;
   }
}

void Show(void)
{
   int i;
   int y;
   SDL_Rect left, right, top, bot;


   for (i=0; i < NodeCounter; i++)
      SDL_BlitSurface(Table[i], NULL, screen, &Tabpos[i]);
      SDL_BlitSurface(puce, NULL, screen, &ppuce);

   

   left.x = 0;
   left.y = 0;
   left.w = 10;
   left.h = WINSIZEH;

   right.x = (WINSIZEW - 10);
   right.y = 0;
   right.w = 10;
   right.h = WINSIZEH;

   top.x = 10;
   top.y = 0;
   top.w = (WINSIZEW - 20);
   top.h = 10;

   bot.x = 10;
   bot.y = (WINSIZEH - 10);
   bot.w = (WINSIZEW - 20);
   bot.h = 10;
   
   SDL_FillRect(screen, &left, SDL_MapRGB(screen->format, 0, 0, 0));
   SDL_FillRect(screen, &right, SDL_MapRGB(screen->format, 0, 0, 0));
   SDL_FillRect(screen, &top, SDL_MapRGB(screen->format, 0, 0, 0));
   SDL_FillRect(screen, &bot, SDL_MapRGB(screen->format, 0, 0, 0));

   /*for (y=WINSIZEH; y > 0; y--)

      //Give offset to rectangle
      offset.x = 0;
      offset.y = y;
      SDL_BlitSurface(puce, NULL, screen, &offset);*/
}

void Quitter(void)
{
   freeNodes();
   SDL_FreeSurface(puce);
   SDL_FreeSurface(screen);
   SDL_Quit();
}

void PurgeScreen(void)
{
   SDL_Rect p;
   p.x = 0;
   p.y = 0;
   blank = SDL_CreateRGBSurface(SDL_HWSURFACE, screen->w, screen->h, 16, 0, 0, 0, 0);
   SDL_FillRect(blank, NULL, SDL_MapRGB(blank->format, 189, 220, 144));
   SDL_BlitSurface(blank, NULL, screen, &p);
   SDL_FreeSurface(blank);
}

void SetPuce()
{
   int genx, geny, flag = 1, cpt;

   while (flag)
   {
      flag = 0;
      genx = (rand() % ((WINSIZEW - 10)/10))*NODESIZE;
      for (cpt=0; cpt < NodeCounter; cpt++)
         if (genx == Tabpos[cpt].x)
         {
            flag = 1;
            break;
      }
   }
   flag = 1;

   while (flag)
   {
      flag = 0;
      geny = (rand() % ((WINSIZEH - 10)/10))*NODESIZE;
      for (cpt=0; cpt < NodeCounter; cpt ++)
         if (geny == Tabpos[cpt].y)
         {
            flag = 1;
            break;
      }
   }

   puce = SDL_CreateRGBSurface(SDL_HWSURFACE, NODESIZE, NODESIZE, 16, 0, 0, 0, 0);
   SDL_FillRect (puce, NULL, SDL_MapRGB (puce->format, 255, 0, 0));
   ppuce.x = genx;
   ppuce.y = geny;
   SDL_BlitSurface(puce, NULL, screen, &ppuce);
}

Uint32 Anime_it(Uint32 interval, void *param)
{
   Uint32 *t = (Uint32*)param;
   SDL_Delay (*t);
   MoveSnake();
   SetPos();
   PurgeScreen();
   Show();
   SDL_Flip(screen);
   return interval;
}

void Lose(void)
{
   SDL_RemoveTimer(timer);
   running = false;
   Quitter();
}

void freeNodes(void)
{
   int i;
   for (i = 0; i < NodeCounter; i++)
      SDL_FreeSurface(Table[i]);
}

void AddNode(void)
{
   NodeCounter++;

   Table[NodeCounter-1] = SDL_CreateRGBSurface(SDL_HWSURFACE, NODESIZE, NODESIZE, 16, 0, 0, 0, 0);
   SDL_FillRect (Table[NodeCounter-1], NULL, SDL_MapRGB (Table[NodeCounter-1]->format, 0, 0, 0));
   SetPuce();
}

int snakeColl(void)
{
   int i, cl = 0;
   for (i = 3; i < NodeCounter; i++)
      if ((Tabpos[0].x == Tabpos[i].x) && (Tabpos[0].y == Tabpos[i].y))
      {
         cl = 1;
         break;
   }

   return cl;
}


In case you want to compile it, use: g++ -o main main.cpp -lSDL -lSDL_image
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hcavolsdsadgadsg
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PostPosted: Sun Apr 11, 2010 3:32 pm    Post subject: Reply with quote
just step through in the debugger or comment out chunks until you cure it.
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