Is there a good tool for programmatically creating diagrams?

Question

I would like a tool to create diagram in a programming language, maybe something like lua.

Is there any tool designed for that?

Answer 1

Yes, you can generate .dot files for Graphviz. Since these are text files, you can do it from any language. I wrote a post a while ago about auto-generating binary-tree diagrams from C code using Graphviz.