- j=0;
- while(rockptr->active && j<MAXROCKS) {
- if(++rockptr - rock >= MAXROCKS) rockptr = rock;
- j++;
- }
- if(!rockptr->active) {
- rockptr->type_number = random() % NROCKS;
- rockptr->image = surf_rock[rockptr->type_number];
- rockptr->shape = &rock_shapes[rockptr->type_number];
- switch(i) {
- case RIGHT:
- rockptr->x = XSIZE;
- rockptr->y = rnd()*(YSIZE + rockptr->image->h);
-
- rockptr->dx = -weighted_rnd_range(rmin[i], rmax[i]) + screendx;
- rockptr->dy = RDY*crnd();
- break;
- case LEFT:
- rockptr->x = -rockptr->image->w;
- rockptr->y = rnd()*(YSIZE + rockptr->image->h);
-
- rockptr->dx = weighted_rnd_range(rmin[i], rmax[i]) + screendx;
- rockptr->dy = RDY*crnd();
- break;
- case BOTTOM:
- rockptr->x = rnd()*(XSIZE + rockptr->image->w);
- rockptr->y = YSIZE;
-
- rockptr->dx = RDX*crnd();
- rockptr->dy = -weighted_rnd_range(rmin[i], rmax[i]) + screendy;
- break;
- case TOP:
- rockptr->x = rnd()*(XSIZE + rockptr->image->w);
- rockptr->y = -rockptr->image->h;
-
- rockptr->dx = RDX*crnd();
- rockptr->dy = weighted_rnd_range(rmin[i], rmax[i]) + screendy;
- break;
- }
-
- rockptr->active = 1;
+ if(!free_rocks) return; // sorry, we ran out of rocks!
+ r = (struct rock *) remove_sprite(&free_rocks);
+ type = urnd() % NROCKS;
+ *r = prototypes[type];
+ r->type = type;
+ switch(i) {
+ case RIGHT:
+ r->x = XSIZE;
+ r->y = frnd()*(YSIZE + r->image->h);
+
+ r->dx = -weighted_rnd_range(rmin[i], rmax[i]) + screendx;
+ r->dy = RDY*crnd();
+ break;
+ case LEFT:
+ r->x = -r->image->w;
+ r->y = frnd()*(YSIZE + r->image->h);
+
+ r->dx = weighted_rnd_range(rmin[i], rmax[i]) + screendx;
+ r->dy = RDY*crnd();
+ break;
+ case BOTTOM:
+ r->x = frnd()*(XSIZE + r->image->w);
+ r->y = YSIZE;
+
+ r->dx = RDX*crnd();
+ r->dy = -weighted_rnd_range(rmin[i], rmax[i]) + screendy;
+ break;
+ case TOP:
+ r->x = frnd()*(XSIZE + r->image->w);
+ r->y = -r->image->h;
+
+ r->dx = RDX*crnd();
+ r->dy = weighted_rnd_range(rmin[i], rmax[i]) + screendy;
+ break;