void runPhysics()//Yes, really
{
int newtime=SDL_GetTicks();
float deltaT=newtime-milliseconds;
milliseconds=newtime;
int i;
Sprite curopt;
int curfloor=optnum*80;
for(i=0;i<optnum;i++)
{
//Calculate gravity
curopt=options[i];
curopt.dy+=deltaT/10;
//calculate delta v
float dv=(curopt.dy*deltaT)/200;
//Collision detection
if(curopt.collides)
{
//Check for collision with other objects
if(dv>0&&i>0&&curopt.y+dv+80>options[i-1].y)
{
curopt=collisionResponse(curopt,options[i-1].y-80);
dv=(curopt.dy*deltaT)/200;
}
else if(i==0&&curopt.y+dv>curfloor)//Check for collision with floor
{
curopt=collisionResponse(curopt,curfloor);
dv=(curopt.dy*deltaT)/200;
}
//else if (dv<0&&i<optnum-1&&curopt.y+dv<options[i+1].y+80)
//{
//curopt=collisionResponse(curopt,options[i-1].y+80);
//}
}
//Apply velocity
if(curopt.y<640)
{
curopt.y+=dv;
}
options[i]=curopt;
}
}
void
PhysicsObject::collisionResponse(const PhysicsObject &object)
{
collisionResponse(&object);
}
