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warp.fem.Nanogrid#

class warp.fem.Nanogrid(grid, temporary_store=None, scalar_type=warp.float32)[source]#

Sparse grid geometry.

Parameters:
__init__(
grid,
temporary_store=None,
scalar_type=warp.float32,
)[source]#

Construct a sparse grid geometry from an in-memory NanoVDB volume.

Parameters:

  • grid (Volume) – The NanoVDB volume. Any type is accepted, but for indexing efficiency an index grid is recommended. If grid is an "on" index grid, cells will be created for active voxels only, otherwise cells will be created for all leaf voxels.

  • temporary_store (TemporaryStore | None) – shared pool from which to allocate temporary arrays

  • scalar_type (type) – Scalar type for grid coordinates (warp.float32 or warp.float64)

Methods

__init__(grid[, temporary_store, scalar_type])

Construct a sparse grid geometry from an in-memory NanoVDB volume.

boundary_side_count()

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()

edge_count()

fill_cell_arg(arg, device)

fill_side_arg(arg, device)

fill_side_index_arg(arg, device)

make_filtered_cell_lookup([filter_func])

reference_cell()

reference_side()

side_arg_value(device)

side_count()

side_deformation_gradient(args, s)

Device function returning the gradient of world position with respect to reference side

side_index_arg_value(device)

side_normal(args, s)

Device function returning the element normal at a sample point

supports_cell_lookup(device)

update_bvh([device])

Refit the geometry's BVH if it exists on device, or build it from scratch otherwise.

vertex_count()

Attributes

FACE_AXIS_MASK

FACE_INNER_OFFSET_BIT

FACE_OUTER_OFFSET_BIT

GRID_AXIS_FLAG

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_closest_point

cell_coordinates

cell_deformation_gradient

cell_dimension

Manifold dimension of the geometry cells

cell_grid

cell_inverse_deformation_gradient

cell_lookup

Device function for looking up the closest cell to a position.

cell_measure

cell_measure_ratio

cell_normal

cell_position

coords_type

Warp vector type for element coordinates matching this geometry's scalar precision.

dimension

Dimension of the embedding space.

edge_grid

face_grid

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_coordinates

side_from_cell_coords

side_inner_cell_coords

side_inner_cell_index

side_inner_inverse_deformation_gradient

side_measure

side_measure_ratio

side_outer_cell_coords

side_outer_cell_index

side_outer_inverse_deformation_gradient

side_position

side_to_cell_arg

transform

Transform matrix mapping index to world space.

vertex_grid

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.
property edge_grid: Volume[source]#
edge_count()[source]#
fill_cell_arg(arg, device)[source]#
fill_side_arg(arg, device)[source]#
supports_cell_lookup(device)[source]#
cell_position = <Function Nanogrid__cell_position(args: Any, s: Any)>#
Parameters:
cell_deformation_gradient = <Function Nanogrid__cell_deformation_gradient(args: Any, s: Any)>#
Parameters:
cell_inverse_deformation_gradient = <Function Nanogrid__cell_inverse_deformation_gradient(args: Any, s: Any)>#
Parameters:
cell_measure = <Function Nanogrid__cell_measure(args: Any, s: Any)>#
Parameters:
cell_normal = <Function Nanogrid__cell_normal(args: Any, s: Any)>#
Parameters:
cell_coordinates = <Function Nanogrid__cell_coordinates(args: Any, cell_index: int, pos: Any)>#
Parameters:
cell_closest_point = <Function Nanogrid__cell_closest_point(args: Any, cell_index: int, pos: Any)>#
Parameters:
side_position = <Function Nanogrid__side_position(args: Any, s: Any)>#
Parameters:
side_inner_inverse_deformation_gradient = <Function Nanogrid__side_inner_inverse_deformation_gradient(args: Any, s: Any)>#
Parameters:
side_outer_inverse_deformation_gradient = <Function Nanogrid__side_outer_inverse_deformation_gradient(args: Any, s: Any)>#
Parameters:
side_measure = <Function Nanogrid__side_measure(args: Any, s: Any)>#
Parameters:
side_measure_ratio = <Function Nanogrid__side_measure_ratio(args: Any, s: Any)>#
Parameters:
side_inner_cell_index = <Function Nanogrid__side_inner_cell_index(args: Any, side_index: int)>#
Parameters:
side_outer_cell_index = <Function Nanogrid__side_outer_cell_index(args: Any, side_index: int)>#
Parameters:
side_inner_cell_coords = <Function Nanogrid__side_inner_cell_coords(args: Any, side_index: int, side_coords: Any)>#
Parameters:

  • args (Any)

  • side_index (int)

  • side_coords (Any)

side_outer_cell_coords = <Function Nanogrid__side_outer_cell_coords(args: Any, side_index: int, side_coords: Any)>#
Parameters:

  • args (Any)

  • side_index (int)

  • side_coords (Any)

side_from_cell_coords = <Function Nanogrid__side_from_cell_coords(args: Any, side_index: int, element_index: int, element_coords: Any)>#
Parameters:

  • args (Any)

  • side_index (int)

  • element_index (int)

  • element_coords (Any)

side_to_cell_arg = <Function Nanogrid__side_to_cell_arg(side_arg: Any)>#
Parameters:

side_arg (Any)

side_coordinates = <Function Nanogrid__side_coordinates(args: Any, side_index: int, pos: Any)>#
Parameters:
side_closest_point = <Function Nanogrid__side_closest_point(args: Any, side_index: int, pos: Any)>#
Parameters: