PBD3DEntity（PBD 3D 实体）#

class genesis.engine.entities.pbd_entity.PBD3DEntity(scene, solver, material, morph, surface, particle_size, idx, particle_start, edge_start, elem_start, vvert_start, vface_start, name: str | None = None)[source]#

Bases: PBDTetEntity

PBD entity represented by a 3D mesh.

Parameters:

  • scene (Scene) – The simulation scene this entity is part of.

  • solver (Solver) – The PBD solver instance managing this entity.

  • material (Material) – Material model defining physical properties such as density and compliance.

  • morph (Morph) – Morph object specifying shape and initial transform (position and rotation).

  • surface (Surface) – Surface or texture representation.

  • particle_size (float) – Target size for particle spacing.

  • idx (int) – Unique index of this entity within the scene.

  • particle_start (int) – Starting index of this entity’s particles in the global particle buffer.

  • edge_start (int) – Starting index of this entity’s edges in the global edge buffer.

  • elem_start (int) – Starting index of this entity’s element in the global buffer.

  • vvert_start (int) – Starting index of this entity’s visual vertices.

  • vface_start (int) – Starting index of this entity’s visual faces.

sample()[source]#

Sample and preprocess the mesh for the PBD tetrahedral entity.

Applies transformation from the morph, stores mesh vertices and faces, and performs remeshing based on the particle size.

property n_elems#

The number of tetrahedral elements in the mesh.

property elem_start#

The starting index of the elements in the global solver.

property elem_end#

The ending index of the elements in the global solver.