Blocks in, blocks out: A language for 3D models

Madeup is a programming language for making things up-literally. Programmers write sequences of commands to move and turn through space, tracing out shapes with algorithms and mathematical operations. The language is designed to teach computation from a tangible, first-person perspective and help students integrate computation back into the physical world. We describe the language in general and reflect specifically on our recent implementation of its block interface.