+ } else ti[LEFT] = (dx0+dx1)/2;
+ }
+ ti[LEFT] *= hfactor;
+ ti[RIGHT] *= hfactor;
+
+ if(dy0 != 0) {
+ if(dy0 < 0) {
+ if(dy1 < 0) ti[BOTTOM] = -(dy0+dy1)/2;
+ else {
+ ti[BOTTOM] = -dy0/2;
+ ti[TOP] = dy1/2;
+ }
+ } else ti[TOP] = (dy0+dy1)/2;
+ }
+ ti[TOP] *= vfactor;
+ ti[BOTTOM] *= vfactor;
+}
+
+void
+new_rocks(void)
+{
+ int i,j;
+ float ti[4];
+
+ rock_timer_increments(ti);
+
+ for(i=0; i<4; i++) {
+ rtimers[i] += ti[i]*gamerate/20;
+ if(rtimers[i] >= 1) {
+ j=0;
+ while(rockptr->active && j<MAXROCKS) {
+ if(++rockptr - rock >= MAXROCKS) rockptr = rock;
+ j++;
+ }
+ if(!rockptr->active) {
+ rtimers[i] -= 1;
+ 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);
+ break;
+ case LEFT:
+ rockptr->x = -rockptr->image->w;
+ rockptr->y = rnd()*(YSIZE + rockptr->image->h);
+ break;
+ case BOTTOM:
+ rockptr->x = rnd()*(XSIZE + rockptr->image->w);
+ rockptr->y = YSIZE;
+ break;
+ case TOP:
+ rockptr->x = rnd()*(XSIZE + rockptr->image->w);
+ rockptr->y = -rockptr->image->h;
+ break;
+ }
+
+ rockptr->dx = RDX*crnd();
+ rockptr->dy = RDY*crnd();
+
+ rockptr->active = 1;