Pretty simple if you've already got functions to convert 2D coords to 3D coords.
For example,
Edit: Slightly better picture
That's just two sprites and a triangle fan (the lit up squares are just a change in vertex color). There's absolutely nothing complex about it, but it works marvelously.
For example,
Edit: Slightly better picture
That's just two sprites and a triangle fan (the lit up squares are just a change in vertex color). There's absolutely nothing complex about it, but it works marvelously.