- if(!rockptr->active) {
- rockhtimer -= 1;
- rockptr->dx = -5.0*(1.0 + rnd());
- rockptr->dy = rnd()-0.5;
- rockptr->type_number = random() % NROCKS;
- rockptr->image = surf_rock[rockptr->type_number];
- rockptr->shape = &rock_shapes[rockptr->type_number];
- rockptr->x = (float)XSIZE;
- rockptr->y = rnd()*(YSIZE + rockptr->image->h);
- rockptr->active = 1;
+ }
+
+ rock_sides(ti, rmin, rmax);
+
+ // loop through the four sides of the screen
+ for(i=0; i<4; i++) {
+ // see if we generate a rock for this side this frame
+ rtimers[i] += ti[i]*t_frame;
+ while(rtimers[i] >= 1) {
+ rtimers[i] -= 1;
+ 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 = frnd()*(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 = frnd()*(YSIZE + rockptr->image->h);
+
+ rockptr->dx = weighted_rnd_range(rmin[i], rmax[i]) + screendx;
+ rockptr->dy = RDY*crnd();
+ break;
+ case BOTTOM:
+ rockptr->x = frnd()*(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 = frnd()*(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;
+ }