trimesh.permutate¶

permutate.py¶

Randomly deform meshes in different ways.

Classes:

Permutator(mesh)

Functions:

`noise`(mesh[, magnitude])	Add gaussian noise to every vertex of a mesh, making no effort to maintain topology or sanity.
`tessellation`(mesh)	Subdivide each face of a mesh into three faces with the new vertex randomly placed inside the old face.
`transform`(mesh[, translation_scale])	Return a permutated variant of a mesh by randomly reording faces and rotatating + translating a mesh by a random matrix.

class trimesh.permutate.Permutator(mesh)¶

Bases: object

Methods:

`noise`([magnitude])	Add gaussian noise to every vertex of a mesh, making no effort to maintain topology or sanity.
`tessellation`()	Subdivide each face of a mesh into three faces with the new vertex randomly placed inside the old face.
`transform`([translation_scale])	Return a permutated variant of a mesh by randomly reording faces and rotatating + translating a mesh by a random matrix.

noise(magnitude=None)¶

Add gaussian noise to every vertex of a mesh, making no effort to maintain topology or sanity.

Parameters

mesh (trimesh.Trimesh) – Input geometry, will not be altered
magnitude (float) – What is the maximum distance per axis we can displace a vertex. If None, value defaults to (mesh.scale / 100.0)

Returns

permutated – Input mesh with noise applied

Return type

trimesh.Trimesh

tessellation()¶

Subdivide each face of a mesh into three faces with the new vertex randomly placed inside the old face.

This produces a mesh with exactly the same surface area and volume but with different tessellation.

transform(translation_scale=1000)¶

Return a permutated variant of a mesh by randomly reording faces and rotatating + translating a mesh by a random matrix.

Parameters: mesh (trimesh.Trimesh) – Mesh, will not be altered by this function
Returns: permutated – Mesh with same faces as input mesh but reordered and rigidly transformed in space.
Return type: trimesh.Trimesh

trimesh.permutate.noise(mesh, magnitude=None)¶