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//! Data structures for intrinsic, integer-based geometry.
//!
//! Tiles, patches, snakes, rats, glue mechanics, the glue catalog over a
//! tileset ([`matchfinder`] / [`matchtypes`]), and the angle / edge
//! primitives they're built on. Higher-level enumeration / classification
//! over these shapes lives in [`crate::combinatorics`].