BOOL8
C_OUTLINE::operator< ( //winding number
const C_OUTLINE & other //other outline
) const
{
inT16 count = 0; //winding count
ICOORD pos; //position of point
inT32 stepindex; //index to cstep
if (!box.overlap (other.box))
return FALSE; //can't be contained
if (stepcount == 0)
return other.box.contains(this->box);
pos = start;
for (stepindex = 0; stepindex < stepcount
&& (count = other.winding_number (pos)) == INTERSECTING; stepindex++)
pos += step (stepindex); //try all points
if (count == INTERSECTING) {
//all intersected
pos = other.start;
for (stepindex = 0; stepindex < other.stepcount
&& (count = winding_number (pos)) == INTERSECTING; stepindex++)
//try other way round
pos += other.step (stepindex);
return count == INTERSECTING || count == 0;
}
return count != 0;
}
