Region *Region::splitDir(double pos, unsigned int dir, bool first)
{
Point& o1 = _bbox.a;
Point& o2 = _bbox.b;
Region *newR = NULL;
if (dir & R_VERT)
{
assert(pos > _bbox.a.x);
assert(pos < _bbox.b.x);
// Vertical recursion:
// Create new block.
Region *r = new Region(pos, o1.y, o2.x, o2.y);
printf("NEW %p\n", r);
r->copyAttributes(this);
Region *o_up = _up;
Region *o_down = _down;
// Resize old block.
o2.x = pos;
pairHor(r, _right);
pairHor(this, r);
if (dir & R_UP)
{
if (!first) pairVer(r, _down->_right);
if (o_up) o_up->splitDir(pos, R_UP);
}
else if (dir & R_DOWN)
{
if (!first) pairVer(_up->_right, r);
if (o_down) o_down->splitDir(pos, R_DOWN);
}
newR = r;
}
else if (dir & R_HORI)
{
// Vertical recursion:
// Create new block.
Region *b = new Region(o1.x, pos, o2.x, o2.y);
printf("NEW %p\n", b);
b->copyAttributes(this);
Region *o_left = _left;
Region *o_right = _right;
// Resize old block.
o2.y = pos;
pairVer(b, _down);
pairVer(this, b);
if (dir & R_LEFT)
{
if (!first) pairHor(b, _right->_down);
if (o_left) o_left->splitDir(pos, R_LEFT);
}
else if (dir & R_RIGHT)
{
if (!first) pairHor(_left->_down, b);
if (o_right) o_right->splitDir(pos, R_RIGHT);
}
newR = b;
}
return newR;
}
