stevengj
commented
7 months ago You will have to build it out of other geometric objects (or use a material-function). e.g. you could divide the pyramid into blocks in various ways (e.g. starting with a solid block and "chopping off" pieces with blocks of air at various angles).
Meep doesn't currently have a "generic polyhedron" object. (In principle we could implement support for e.g. any closed surface described by a triangular mesh, e.g. generated with gmsh.)
I did not find such geometry on the site. The closest thing is a prism and a cone