cpHandleInit(cpHandle *hand, object obj)
{
hand.obj = obj;
hand.retain = 0;
hand.stamp = 0;
return hand;
}
static int handleSetEql(object obj, cpHandle *hand){return (obj == hand.obj);}
cpHandleRelease(cpHandle *hand, cpArray *pooledHandles)
{
hand.retain--;
if(hand.retain == 0) cpArrayPush(pooledHandles, hand);
}
static void cpHandleRetain(cpHandle *hand){hand.retain++;}
rehash_helper(cpHandle *hand, cpSpaceHash *hash)
{
hashHandle(hash, hand, hash.spatialIndex.bbfunc(hand.obj));
}
hashHandle(cpSpaceHash *hash, cpHandle *hand, cpBB bb)
{
// Find the dimensions in cell coordinates.
double dim = hash.celldim;
int l = floor_int(bb.l/dim); // Fix by ShiftZ
int r = floor_int(bb.r/dim);
int b = floor_int(bb.b/dim);
int t = floor_int(bb.t/dim);
int n = hash.numcells;
for(int i=l; i<=r; i++){
for(int j=b; j<=t; j++){
cpHashValue idx = hash_func(i,j,n);
cpSpaceHashBin *bin = hash.table[idx];
// Don't add an object twice to the same cell.
if(containsHandle(bin, hand)) continue;
cpHandleRetain(hand);
// Insert a new bin for the handle in this cell.
cpSpaceHashBin *newBin = getEmptyBin(hash);
newBin.handle = hand;
newBin.next = bin;
hash.table[idx] = newBin;
}
}
}
containsHandle(cpSpaceHashBin *bin, cpHandle *hand)
{
while(bin){
if(bin.handle == hand) return true;
bin = bin.next;
}
return false;
}