geomanpy 0.4.0

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geomanpy

Python bindings for glam and wreck — fast geometric/linear-algebra primitives and collision detection, backed by Rust.

geomanpy exposes glam's vectors, quaternions, matrices and affine transforms, plus wreck's collision shapes and broad/narrow-phase queries, as native Python classes. Every type integrates with NumPy and behaves like a dataclass for serialization frameworks.

Features

• Linear algebra — Vec2, Vec3, Vec4, Quat, Mat3, Mat4, Affine3 with the full glam method surface (normalization, projection, interpolation, Euler conversions, projection/view matrices, …).
• Collision shapes — Sphere, Capsule, Cuboid, Cylinder, ConvexPolytope, ConvexPolygon, Line, Ray, LineSegment, Plane, Pointcloud, plus SphereCollection and Collider aggregates.
• Transform & query protocols — shared Scalable, Transformable, Bounded, Stretchable, and Collides interfaces across shapes (scaled, translated, rotated_quat, transformed, broadphase, obb, aabb, collides).
• NumPy interop — from_numpy/to_numpy and the __array__ protocol on every primitive.
• Serialization — instances expose __dataclass_fields__ so orjson, msgspec, and pydantic treat them as dataclasses; pickling is supported via __getnewargs_ex__.
• Fully typed — ships a py.typed marker and complete .pyi stubs.

Installation

pip install geomanpy

Usage

import numpy as np
from geomanpy import Vec3, Quat, Sphere, Cuboid, Collider

# Linear algebra
a = Vec3(1.0, 2.0, 3.0)
b = Vec3.from_numpy(np.array([4.0, 5.0, 6.0]))
print(a.dot(b), a.cross(b).to_numpy())

# Rotations
q = Quat.from_rotation_z(np.pi / 2)
print((q * Vec3.X).to_numpy())

# Collision detection
ball = Sphere(Vec3.ZERO, radius=1.0)
box = Cuboid.from_aabb(Vec3(0.5, 0.5, 0.5), Vec3(2.0, 2.0, 2.0))
print(ball.collides(box))

# Aggregate many shapes behind a single broad/narrow-phase query
scene = Collider()
scene.add(box)
print(scene.collides(ball))

Convenience aliases are provided for common names: Quaternion (Quat), Rotation3d (Mat3), Translation3d (Vec3), Transform3d (Affine3), Box3d (Cuboid), Sphere3d (Sphere), Cylinder3d (Cylinder), ObstacleUnion (Collider), and PointCloud (Pointcloud).

Backends

geomanpy can target two Python runtimes, selected at build time by Cargo feature:

• pyo3-backend (default) — builds a CPython extension module via PyO3.
• rustpython-backend — registers a geomanpy module inside an embedded RustPython VM, reusing the same wrapper types.

Exactly one backend must be active. The optional safe-locks feature switches mutable wrappers to RustPython's PyRwLock.

Building from source

The CPython wheel is built with maturin:

maturin develop   # build and install into the active virtualenv
maturin build --release

License

Licensed under the Apache License, Version 2.0.