func (p *Path) bounds() s2.Rect {
r := s2.EmptyRect()
for _, ll := range p.Positions {
r = r.AddPoint(ll)
}
return r
}
func (m *Context) determineBounds() s2.Rect {
r := s2.EmptyRect()
for _, marker := range m.markers {
r = r.Union(marker.bounds())
}
for _, path := range m.paths {
r = r.Union(path.bounds())
}
for _, area := range m.areas {
r = r.Union(area.bounds())
}
return r
}
func (m *Marker) bounds() s2.Rect {
r := s2.EmptyRect()
r = r.AddPoint(m.Position)
return r
}