void vtkRegionGrowing::Start()
{
mVolume->GetExtent(mExt);
createSlice();
int n=mSeeds.size();
for(int i=0; i<n; i++)mQueue.push(mSeeds[i]);
if(mOrientation==0)processX();
if(mOrientation==1)processY();
if(mOrientation==2)processZ();
copySlice();
mSlice->Delete();
}
Box* _listSlice(BoxedList* self, i64 start, i64 stop, i64 step, i64 length) {
// printf("%ld %ld %ld\n", start, stop, step);
assert(step != 0);
if (step > 0) {
assert(0 <= start);
assert(stop <= self->size);
} else {
assert(start < self->size);
assert(-1 <= stop);
}
BoxedList* rtn = new BoxedList();
if (length > 0) {
rtn->ensure(length);
copySlice(&rtn->elts->elts[0], &self->elts->elts[0], start, step, length);
rtn->size += length;
}
return rtn;
}