boolean FillPolygonObj::Intersects (BoxObj& ub) {
BoxObj b;
GetBox(b);
if (!b.Intersects(ub)) {
return false;
}
if (b.Within(ub)) {
return true;
}
LineObj bottom(ub._left, ub._bottom, ub._right, ub._bottom);
if (Intersects(bottom)) {
return true;
}
LineObj right(ub._right, ub._bottom, ub._right, ub._top);
if (Intersects(right)) {
return true;
}
LineObj top(ub._right, ub._top, ub._left, ub._top);
if (Intersects(top)) {
return true;
}
LineObj left(ub._left, ub._top, ub._left, ub._bottom);
return Intersects(left);
}
Graphic* Picture::LastGraphicWithin (BoxObj& userb) {
Iterator i;
BoxObj b;
for (Last(i); !Done(i); Prev(i)) {
Graphic* subgr = GetGraphic(i);
subgr->GetBox(b);
if (b.Within(userb)) {
return subgr;
}
}
return nil;
}
void Damage::Incur (BoxObj& newb) {
BoxObj* b;
Iterator i;
if (_areas->IsEmpty()) {
_areas->Prepend(new UList(new BoxObj(&newb)));
} else if (_areas->First() == _areas->Last()) {
FirstArea(i);
b = GetArea(i);
if (newb.Intersects(*b)) {
if (!newb.Within(*b)) {
*b = *b + newb;
}
} else {
_areas->Prepend(new UList(new BoxObj(&newb)));
}
} else {
Merge(newb);
}
}
boolean MultiLineObj::Within (BoxObj& userb) {
BoxObj b;
GetBox(b);
return b.Within(userb);
}