3DLDF currently provides a set of basic plane and solid geometrical figures. However, some important ones are still missing. There are many useful geometrical data types and functions whose implementation would require no more than elementary geometry.
class Triangle, which can be used for
calculating triangle solutions.
Conic_Section and derive Ellipse
from it. This will be the first case of
multiple inheritance1
in 3DLDF, since Ellipse is already
derived from Path. See Ellipse Reference.
Add the classes Parabola and Hyperbola.
Ellipse and a Circle in a plane,
but I haven't had a chance to try implementing it yet.
If this works, I think it will make it possible to find the intersection of two coplanar ellipses algebraically, because it will be possible to transform them both such that one of them becomes circular.
Octahedron will complete the set of regular Platonic
polyhedra.
Ellipsoid and a derived class Sphere.
Solid and
Solid_Faced.
In particular, it would help to store the vertices of
Polyhedra as individual Points, rather
than using Reg_Polygons. I'd also
like to find a better way of generating Solids, without using
rotations, if possible.