// gets bounding box of element
Rectf DXFBlockRef::GetBoundingBox(void) const
{
Rectf res;
// get dxf object
DXF const &dxf = GetDXF();
// get block data by name; if none, returns
if(!dxf.HasBlock(name))
return Rectf(1e99, -1e99, -1e99, 1e99);
DXFBlock const &blk = dxf.GetBlock(name);
// get the bounding box of included entities
Rectf bbe = blk.entities.GetBoundingBox();
// now we need to apply transformation to bbox points
TransMatrix M;
M.Translate(insertPoint).Rotate(angle).Scale(scale);
Pointf bl = M(bbe.BottomLeft());
Pointf tl = M(bbe.TopLeft());
Pointf br = M(bbe.BottomRight());
Pointf tr = M(bbe.TopRight());
// and now get the minimum and maximum coordinate values
res.left = min(min(bl.x, tl.x), min(br.x, tr.x));
res.right = max(max(bl.x, tl.x), max(br.x, tr.x));
res.bottom = min(min(bl.y, tl.y), min(br.y, tr.y));
res.top = max(max(bl.y, tl.y), max(br.y, tr.y));
return res;
}
void BoundsPainter::Finish(double width)
{
if(compute_svg_boundingbox && !IsNull(boundingbox)) {
Rectf h = boundingbox.Inflated(width / 2);
Pointf a = mtx.Top().Transform(h.TopLeft());
Pointf b = mtx.Top().Transform(h.BottomRight());
svg_boundingbox.Union(a);
svg_boundingbox.Union(b);
}
}
