API reference · 05

Connectivity

A connectivity maps each instance of one primitive to instances of another primitive.

The examples create connectivity objects with primitive.addConnectivity. This connectivity describes the relationship between each tetrahedra to the vertices.

tetrahedra_to_vertices = tetrahedra.addConnectivity("to_vertices", to=vertices, data=tet_indices, dimension=4)

updateConnectivity

updateConnectivity(value)

Update the connectivity value with an array.

Parameter	Type	Description
`value`	`numpy.ndarray`, `list[list[int]]`, or `pycuda.gpuarray.GPUArray`	New target indices. Values are stored as flattened unsigned 32-bit integers on the GPU.

Example

point_point_collision_pairs.updateConnectivity(collision_pairs.reshape((-1, 2)))

Returns: None.

Properties

Property	Type	Description
`name`	`str`	Connectivity identifier supplied to `primitive.addConnectivity`.
`fullName`	`str`	Identifier containing the source primitive, target primitive, and connectivity name.
`fromPrimitive`	primitive	Source primitive whose instances own the mapping rows.
`toPrimitive`	primitive	Target primitive indexed by the mapping values.
`value`	`pycuda.gpuarray.GPUArray`	Flattened target indices stored as `uint32` on the GPU.
`dimension`	`int`	Number of target indices per source instance; `0` denotes variable width.
`mesh`	mesh	Mesh shared by the source and target primitives.
`scene`	scene	Scene reached through the shared mesh.
`type`	`str`	Always `"connectivity"`.