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#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <string.h>
#include "SDL.h"
#include "sge.h"
int main(int argc, char** argv)
{
/* Init SDL */
if ( SDL_Init(SDL_INIT_TIMER|SDL_INIT_VIDEO) < 0 ) {
fprintf(stderr, "Couldn't load SDL: %s\n", SDL_GetError());
exit(1);
}
/* Clean up on exit */
atexit(SDL_Quit);
/* Set window title */
SDL_WM_SetCaption("Collision", "collision");
/* Initialize the display */
SDL_Surface *screen;
screen = SDL_SetVideoMode(640, 480, 16, SDL_SWSURFACE);
if ( screen == NULL ) {
fprintf(stderr, "Couldn't set video mode: %s\n", SDL_GetError());
exit(1);
}
sge_ClearSurface(screen,0);
//Allocate some buffers
SDL_Surface *img1,*buffer;
//The buffer for the ball
img1=SDL_AllocSurface(SDL_SWSURFACE|SDL_SRCCOLORKEY,30,30,16, 0,0,0,0);
sge_ClearSurface(img1,0);
sge_AAFilledCircle(img1,15,15, 14, 150,200,50);
SDL_SetColorKey(img1, SDL_SRCCOLORKEY|SDL_RLEACCEL, 0); //Set transparent color
//Draw a background (add more filled rectangles if you want)
sge_FilledRect(screen, 300,80, 340,400, 0,0,255);
sge_FilledRect(screen, 0,360, 200,400, 0,0,255);
sge_FilledRect(screen, 340,260, 550,300, 0,0,255);
sge_FilledRect(screen, 100,80, 140,360, 0,0,255);
sge_FilledRect(screen, 500,80, 550,130, 0,0,255);
buffer=SDL_DisplayFormat(screen); //The buffer for the background
//Make the collision maps
sge_cdata *cimg1, *cbg;
cimg1=sge_make_cmap(img1);
SDL_SetColorKey(buffer, SDL_SRCCOLORKEY, 0); //Must set transparent color on background
cbg=sge_make_cmap(buffer);
SDL_SetColorKey(buffer, 0, 0); //No transparency
// If the delay between two PollEvent is greater than 100 and all events are added to the
// event queue, the queue will grow *fast*. You're program will have no change to catch
// up. You *must* try to avoid adding events unnecessarily - mousemotions for example.
SDL_EventState(SDL_MOUSEMOTION,SDL_IGNORE);
Sint16 x=50,y=190;
Sint16 oldx=x,oldy=y;
bool right=true, down=false;
sge_Update_OFF();
// Sets start time
Uint32 tstart=SDL_GetTicks();
int loops=0;
// Main loop
SDL_Event event;
do{
SDL_Delay(10);
//Check borders
if( (x+img1->w)>=screen->w )
right=false;
else if(x<=0)
right=true;
if( (y+img1->h)>=screen->h )
down=false;
else if(y<=0)
down=true;
//Check for collision
if( sge_cmcheck(cbg,0,0, cimg1,x,y) ){
//SDL_Delay(200);
//Bounce the ball
if( abs(sge_get_cx()-(x+img1->w/2)) < abs(sge_get_cy()-(y+img1->h/2)) ){
if( sge_get_cy()-(y+img1->h/2) < 0 )
down=true;
else
down=false;
}
else{
if( sge_get_cx()-(x+img1->w/2) < 0 )
right=true;
else
right=false;
}
}
//Update pos
if(right)
x++;
else
x--;
if(down)
y++;
else
y--;
//Update last pos from buffer
sge_Blit(buffer,screen,oldx,oldy, oldx,oldy, img1->w,img1->h);
//Draw the circle
sge_Blit(img1,screen,0,0, x,y, img1->w,img1->h);
oldx=x;oldy=y;
//Update screen
sge_Update_ON();
sge_UpdateRect(screen,x-1,y-1,img1->w+2,img1->h+2);
sge_Update_OFF();
loops++;
// Check events
if(SDL_PollEvent(&event)==1){
if(event.type==SDL_KEYDOWN && event.key.keysym.sym==SDLK_ESCAPE){break;}
if(event.type==SDL_QUIT){break;}
}
}while(true);
/* Print FPS */
printf("%.2f FPS (target: 100).\n",((double)loops*1000)/(SDL_GetTicks()-tstart));
//Clean upp
SDL_FreeSurface(img1);
SDL_FreeSurface(buffer);
sge_destroy_cmap(cimg1);
sge_destroy_cmap(cbg);
return 0;
}
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