/* RBreakout.h
This is the actual game class
*/
#include <SDL/SDL.h>
class RBreakout
{
public:
RBreakout();
int GameLoop();
private:
SDL_Surface *screen;
};
// Constructor
RBreakout::RBreakout()
{
// Initiate SDL
if(SDL_Init(SDL_INIT_VIDEO) < 0)
{
printf("Unable to start SDL");
exit(1);
}
// Register EXIT so things get cleaned up correctly
atexit(SDL_Quit);
// Attempt to create a window
screen = SDL_SetVideoMode(640, 480, 32, SDL_SWSURFACE);
// Else fail
if(screen = NULL)
printf("Opps, you bwoke it. Cannot create the window");
}
int RBreakout::GameLoop()
{
while(1)
{
// Event Handeling
SDL_Event event;
while(SDL_PollEvent(&event))
{
// Handle Events
switch(event.type)
{
case SDL_KEYUP:
{
if(event.key.keysym.sym == SDLK_ESCAPE)
return 0;
}
case SDL_QUIT:
{
return 0;
}
}
}
}
return 0;
}
SDL Help
Author
Well, I decided to try out SDL because the way Irrlicht is designed it didn't work out to well for my game.
So I have SDL setup with Dev-Cpp, and everything compiles fine but when I run the program it doesn't stay open. Any ideas?
PS: I HATE it when you figure out the problem right after you post about it. It is late and I am tierd so this might be the case.
What does your main look like?
inside your main you have to be sure to create a new RBreakout object and call it's GameLoop function.
inside your main you have to be sure to create a new RBreakout object and call it's GameLoop function.
Author
Yep, it does that
#include <iostream>#include <cstdlib>#include "RBreakout.h"int main(int argc, char *argv[]){ RBreakout game; game.GameLoop(); return 0;}
I compiled the code you posted and it runs just fine. But there is one line containing an error which might lead to some headache in the future:
if(screen = NULL) // should be if(screen == NULL) printf("Opps, you bwoke it. Cannot create the window");
Author
Thanks. I fixed both of your suggestions and it still flashes on for a second them closes. :-\
You need breaks after your cases like so:
You don't need the braces either. It could be that a key up occurs, but is not escape, but because there is no break, it falls through to the quit case and exits.
case SDL_KEYUP: if(event.key.keysym.sym == SDLK_ESCAPE) return 0; break;case SDL_QUIT: return 0; break;You don't need the braces either. It could be that a key up occurs, but is not escape, but because there is no break, it falls through to the quit case and exits.
SDL_Delay(5000) // @param - milliseconds. So, 5 seconds it pauses
Also, get in the habit of adding break; to any of your case statements or you'll likely run into headaches. ;)
case foo:
blah;
break;
case bar:
blah;
break;
It may also be better practice to create a boolean, set it to false and make your gameloop do a while(!done) { }
So, get rid of your while inside of the gameloop, go back to your main and wrap it with
bool done = false;
while(!done) {
game.GameLoop();
}
and make sure inside your gameloop you set bool to true when your keypress is active.
-Dave
Also, get in the habit of adding break; to any of your case statements or you'll likely run into headaches. ;)
case foo:
blah;
break;
case bar:
blah;
break;
It may also be better practice to create a boolean, set it to false and make your gameloop do a while(!done) { }
So, get rid of your while inside of the gameloop, go back to your main and wrap it with
bool done = false;
while(!done) {
game.GameLoop();
}
and make sure inside your gameloop you set bool to true when your keypress is active.
-Dave
Quote:Original post by ildave1
bool done = false;
while(!done) {
game.GameLoop();
}
or another method would be to have GameLoop() return false when the user exits.
bool RBreakout::GameLoop(){ // Event Handeling SDL_Event event; while(SDL_PollEvent(&event)) { // Handle Events switch(event.type) { case SDL_KEYUP: if(event.key.keysym.sym == SDLK_ESCAPE) { return false; } break; case SDL_QUIT: return false; break; } } return true; }int main(int argc, char *argv[]){ RBreakout game; while( game.GameLoop() ) {} return 0;}This topic is closed to new replies.
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