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#include <SDL/SDL.h>
#include <SDL/SDL_image.h>
#include <iostream>
using namespace std;
Uint32 getPixel(SDL_Surface *surface, int x, int y)
{
int bpp = surface->format->BytesPerPixel;
/* Ici p est l'adresse du pixel que l'on veut connaitre */
Uint8 *p = (Uint8 *)surface->pixels + y * surface->pitch + x * bpp;
switch(bpp) {
case 1:
return *p;
case 2:
return *(Uint16 *)p;
case 3:
if(SDL_BYTEORDER == SDL_BIG_ENDIAN)
return p[0] << 16 | p[1] << 8 | p[2];
else
return p[0] | p[1] << 8 | p[2] << 16;
case 4:
return *(Uint32 *)p;
default:
return 0; /* Ne devrait pas arriver, mais évite les erreurs */
}
}
int main(int argc, char *argv[])
{
SDL_Surface *ecran = NULL, *surf1 = NULL, *surf2=NULL;
SDL_Rect pos1, pos2;
SDL_Event event;
int continuer = 1, collisionx=0, collisiony, collision=0, aa1,aa2, bb1,bb2,gg1,gg2,rr1,rr2;
Uint32 pixel1, pixel2;
Uint8 r1,g1,b1,a1,r2,g2,b2,a2;
SDL_Init(SDL_INIT_VIDEO);
ecran = SDL_SetVideoMode(1200, 900, 32, SDL_HWSURFACE | SDL_DOUBLEBUF); /* Double Buffering */
SDL_WM_SetCaption("pixel perfect", NULL);
surf1 = IMG_Load("boule2.png");
surf2 = IMG_Load("boule.png");
pos1.x = ecran->w / 2 - surf1->w / 2;
pos1.y = ecran->h / 2 - surf1->h / 2;
pos2.x=300;
pos2.y=300;
SDL_EnableKeyRepeat(1, 1); /* Activation de la répétition des touches */
while (continuer)
{
SDL_WaitEvent(&event);
switch(event.type)
{
case SDL_QUIT:
continuer = 0;
break;
case SDL_KEYDOWN:
switch(event.key.keysym.sym)
{
case SDLK_UP:
pos1.y--;
break;
case SDLK_ESCAPE:
continuer=0;
break;
case SDLK_DOWN:
pos1.y++;
break;
case SDLK_RIGHT:
pos1.x++;
break;
case SDLK_LEFT:
pos1.x--;
break;
}
break;
}
//////////////////////calcul de la longueur en x /////////////////////
collisionx=0;
collisiony=0;
collision=0;
if((pos1.x - pos2.x) > 0)
{
if((pos1.x - pos2.x) < surf2->w)
{
collisionx = (surf2->w - (pos1.x - pos2.x));
}
}
else if((pos2.x - pos1.x) > 0)
{
if((pos2.x - pos1.x) < surf1->w)
{
collisionx = (surf1->w - (pos2.x - pos1.x));
}
}
else
{
collisionx= 1;
}
//////////////////////calcul de la longueur en y /////////////////////
if(collisionx !=0)
{
if((pos1.y - pos2.y) > 0)
{
if((pos1.y - pos2.y) < surf2->h)
{
collisiony = ( surf2->h -(pos1.y - pos2.y));
}
}
else if((pos2.y - pos1.y) > 0)
{
if((pos2.y - pos1.y) < surf1->h)
{
collisiony = ( surf1->h - (pos2.y - pos1.y));
}
}
else
{
collisiony= 1;
}
}
if(collisiony !=0)
{
for(int i=0; i<= collisionx ;i++)
{
for(int j=0; j <= collisiony ;j++)
{
if((pos1.x - pos2.x) > 0)
{
if((pos1.y - pos2.y) > 0)
{
pixel1 = getPixel(surf1,i,j);
pixel2 = getPixel(surf2,((surf2->w - collisionx)+i),((surf2->h- collisiony)+j));
SDL_GetRGBA(pixel1, surf1->format, &r1, &g1, &b1, &a1);
SDL_GetRGBA(pixel2, surf2->format, &r2, &g2, &b2, &a2);
aa1 = (int)a1;
aa2 = (int)a2;
rr1 = (int)r1;
rr2 = (int)r2;
gg2 = (int)g1;
gg1 = (int)g2;
bb1 = (int)b1;
bb2 = (int)b2;
if(aa1 !=0 && aa2 !=0)
{
cout << aa1 <<" : "<< aa2 << " "<< rr1 <<" : "<< rr2 << " " << gg1 <<" : "<< gg2 << " " << bb1 <<" : "<< bb2 <<endl;
collision=1;
}
}
else if((pos1.y - pos2.y) <0)
{
pixel1=getPixel(surf1,(i),((surf1->h - collisiony) + j));
pixel2=getPixel(surf2,((surf2->w - collisionx)+i),(j));
SDL_GetRGBA(pixel1, surf1->format, &r1, &g1, &b1, &a1);
SDL_GetRGBA(pixel2, surf2->format, &r2, &g2, &b2, &a2);
aa1 = (int)a1;
aa2 = (int)a2;
rr1 = (int)r1;
rr2 = (int)r2;
gg2 = (int)g1;
gg1 = (int)g2;
bb1 = (int)b1;
bb2 = (int)b2;
if(aa1 !=0 && aa2 !=0)
{
cout << aa1 <<" : "<< aa2 << " "<< rr1 <<" : "<< rr2 << " " << gg1 <<" : "<< gg2 << " " << bb1 <<" : "<< bb2 <<endl;
collision=1;
}
}
}
else if((pos1.x - pos2.x) < 0)
{
if((pos1.y - pos2.y) > 0)
{
pixel1 = getPixel(surf1,((surf1->w - collisionx) + i),j);
pixel2 = getPixel(surf2,i,((surf2->h-collisiony)+j));
SDL_GetRGBA(pixel1, surf1->format, &r1, &g1, &b1, &a1);
SDL_GetRGBA(pixel2, surf2->format, &r2, &g2, &b2, &a2);
aa1 = (int)a1;
aa2 = (int)a2;
rr1 = (int)r1;
rr2 = (int)r2;
gg2 = (int)g1;
gg1 = (int)g2;
bb1 = (int)b1;
bb2 = (int)b2;
if(aa1 !=0 && aa2 !=0)
{
cout << aa1 <<" : "<< aa2 << " "<< rr1 <<" : "<< rr2 << " " << gg1 <<" : "<< gg2 << " " << bb1 <<" : "<< bb2 <<endl;
collision=1;
}
}
else if((pos1.y - pos2.y) < 0)
{
pixel1=getPixel(surf1,((surf1->w - collisionx)+i),((surf1->h - collisiony)+j));
pixel2=getPixel(surf2,i,j);
SDL_GetRGBA(pixel1, surf1->format, &r1, &g1, &b1, &a1);
SDL_GetRGBA(pixel2, surf2->format, &r2, &g2, &b2, &a2);
aa1 = (int)a1;
aa2 = (int)a2;
rr1 = (int)r1;
rr2 = (int)r2;
gg2 = (int)g1;
gg1 = (int)g2;
bb1 = (int)b1;
bb2 = (int)b2;
if(aa1 !=0 && aa2 !=0)
{
collision=1;
cout << aa1 <<" : "<< aa2 << " "<< rr1 <<" : "<< rr2 << " " << gg1 <<" : "<< gg2 << " " << bb1 <<" : "<< bb2 <<endl;
}
}
}
}
}
}
//if(collision == 1) cout << "collision !!!" << endl;
SDL_FillRect(ecran, NULL, SDL_MapRGB(ecran->format, 255, 255, 255));
SDL_BlitSurface(surf1, NULL, ecran, &pos1);
SDL_BlitSurface(surf2, NULL, ecran, &pos2);
SDL_Flip(ecran);
}
SDL_FreeSurface(surf1);
SDL_Quit();
return EXIT_SUCCESS;
} |
probleme de fonction pixel perfect sdl
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