warp.fem.Trimesh2D#

class warp.fem.Trimesh2D( tri_vertex_indices, positions, build_bvh=False, temporary_store=None, )[source]#

2D Triangular mesh geometry

Parameters:

tri_vertex_indices (array)
positions (array)
build_bvh (bool)
temporary_store (TemporaryStore | None)

__init__( tri_vertex_indices, positions, build_bvh=False, temporary_store=None, )[source]#

Construct a D-dimensional triangular mesh.

Parameters:

tri_vertex_indices (array) – warp array of shape (num_tris, 3) containing vertex indices for each tri
positions (array) – warp array of shape (num_vertices, D) containing the position of each vertex
temporary_store (TemporaryStore | None) – shared pool from which to allocate temporary arrays
build_bvh (bool) – Whether to also build the triangle BVH, which is necessary for the global fem.lookup operator to function without initial guess

Methods

`__init__`(tri_vertex_indices, positions[, ...])	Construct a D-dimensional triangular mesh.
`boundary_side_count`()	Number of boundary sides in the mesh.
`build_bvh`([device])	Rebuild the geometry's Bounding Volume Hierarchy (BVH) for `device` from scratch.
`bvh_id`(device)	Return the BVH identifier for the given device, or `0` if unavailable.
`cell_arg_value`(device)
`cell_count`()	Number of cells in the mesh.
`cell_inverse_deformation_gradient`(args, s)	Device function returning the matrix right-transforming a gradient w.r.t.
`cell_measure`(args, s)	Device function returning the measure determinant (e.g. volume, area) at a given point.
`cell_normal`(args, s)	Device function returning the element normal at a sample point.
`fill_cell_arg`(args, device)	Fill the arguments to be passed to cell-related device functions.
`fill_side_arg`(args, device)	Fill the arguments to be passed to side-related device functions.
`fill_side_index_arg`(args, device)	Fill the arguments to be passed to side-index device functions.
`make_filtered_cell_lookup`([filter_func])	Create a filtered cell lookup function.
`reference_cell`()	Reference element for mesh cells.
`reference_side`()	Reference element for mesh sides.
`side_arg_value`(device)
`side_count`()	Number of sides in the mesh.
`side_index_arg_value`(device)
`side_inner_inverse_deformation_gradient`(...)	Device function returning the matrix right-transforming a gradient w.r.t.
`side_measure`(args, s)	Device function returning the measure determinant (e.g. volume, area) at a given point.
`side_measure_ratio`(args, s)	Device function returning the ratio of the measure of a side to that of its neighbour cells
`side_normal`(args, s)	Device function returning the element normal at a sample point
`side_outer_inverse_deformation_gradient`(...)	Device function returning the matrix right-transforming a gradient w.r.t.
`side_to_cell_arg`(side_arg)	Device function converting a side-related argument value to a cell-related argument value, for promoting trace samples to the full space
`supports_cell_lookup`(device)	Return whether cell lookups are supported on the given device.
`update_bvh`([device])	Refit the geometry's BVH if it exists on `device`, or build it from scratch otherwise.
`vertex_count`()	Number of vertices in the mesh.

Attributes

`SideIndexArg`	Structure containing arguments to be passed to device functions for indexing sides.
`base`	Return the base geometry from which this geometry derives its topology.
`boundary_side_index`
`cell_bounds`
`cell_bvh_id`
`cell_closest_point`
`cell_deformation_gradient`
`cell_dimension`	Manifold dimension of the geometry cells
`cell_lookup`	Device function for looking up the closest cell to a position.
`cell_measure_ratio`
`cell_position`
`coords_type`	Warp vector type for element coordinates matching this geometry's scalar precision.
`dimension`	Dimension of the embedding space.
`edge_tri_indices`	Triangle indices for each edge.
`edge_vertex_indices`	Vertex indices for each edge.
`name`	Name of the geometry, including scalar type suffix for non-default precision.
`sample_type`	Warp struct type for samples matching this geometry's scalar precision.
`scalar_type`
`side_closest_point`
`side_deformation_gradient`
`side_from_cell_coords`
`side_inner_cell_coords`
`side_inner_cell_index`
`side_outer_cell_coords`
`side_outer_cell_index`
`side_position`
`CellArg`	Structure containing arguments to be passed to device functions evaluating cell-related quantities.
`SideArg`	Structure containing arguments to be passed to device functions evaluating side-related quantities.