tyssue.collisions package

Subpackages

• tyssue.collisions.cpp package
  • Module contents

Submodules

tyssue.collisions.intersection module

tyssue.collisions.intersection.self_intersections(sheet)

Checks for self collisions for the sheet

Parameters

sheet (a Sheet object) – This object must have a triangular_mesh method returning a valid triangular mesh.

Returns

edge_pairs – Array of shape (n_intersections, 2) with the indices of the pairs of intersecting edges

Return type

np.ndarray of indices

tyssue.collisions.solvers module

class tyssue.collisions.solvers.CollidingBoxes(sheet, position_buffer, intersecting_edges)

Bases: object

Utility class to manage collisions

get_limits(shyness=1e-10)

Iterator over the position boundaries avoiding the collisions.

Parameters

shyness (float) – the extra distance between two colliding vertices, on each side of the collision plane.

Yields

lower, upper (two pd.Series) – those Series are indexed by the vertices of the colliding faces giving the lower and upper bounds for the vertices

solve_collisions(shyness=1e-10)

Solves the collisions by finding the collision plane.

Modifies the sheet vertex positions inplace such that they rest at a distance shyness apart on each side of the collision plane.

Parameters

• shyness (float, default 1e-10) – the extra distance between two colliding vertices, on each side of the collision plane.

• Liu (Based on) –

• J.-D. –

• Ko –

• M.-T. –

• Chang (&) –

• (1998) (R.-C.) –

:param : :param *A simple self-collision avoidance for cloth animation*.: :param Computers & Graphics: :param 22(1): :param 117–128.: :param DOI <https: :type `DOI

tyssue.collisions.solvers.auto_collisions(fun)

Decorator to solve collisions detections after the execution of the decorated function.

It is assumed that the two first arguments of the decorated function are a Sheet object and a geometry class

Note

The function is re-executed with the updated geometry

tyssue.collisions.solvers.revert_positions(sheet, position_buffer, intersecting_edges)

tyssue.collisions.solvers.solve_bulk_collisions(eptm, position_buffer)

Corrects the auto-collisions for the outer surface(s) of a 3D epithelium.

Parameters

• eptm (a Epithelium object) –

• position_buffer (np.array of shape (eptm.Nv, eptm.dim):) – positions of the vertices prior to the collisions

Returns

changed – True if the positions of some vertices were changed

Return type

bool

tyssue.collisions.solvers.solve_sheet_collisions(sheet, position_buffer)

Corrects the auto-collisions for the outer surface(s) of a 2.5D sheet.

Parameters

• sheet (a Sheet object) –

• position_buffer (np.array of shape (sheet.Nv, sheet.dim):) – positions of the vertices prior to the collisions

Returns

changed – True if the positions of some vertices were changed

Return type

bool

Module contents