gs.materials.PBD.Elastic#

class genesis.engine.materials.PBD.elastic.Elastic(rho=1000.0, static_friction=0.15, kinetic_friction=0.15, stretch_compliance=0.0, bending_compliance=0.0, volume_compliance=0.0, stretch_relaxation=0.1, bending_relaxation=0.1, volume_relaxation=0.1)[source]#

Bases: Base

The 3D elastic volumentric material class for PBD.

Parameters:

  • rho (float, optional) – The density of the elastic material (kg/m^3). Default is 1000.0.

  • static_friction (float, optional) – Static friction coefficient. Represents the resistance to the start of sliding motion between two contacting particles. In collision resolution, it determines how much tangential force can be applied before sliding begins. Default is 0.15.

  • kinetic_friction (float, optional) – Kinetic (Dynamic) Friction Coefficient. Represents the resistance during sliding motion between two contacting particles. Applied when particles are already sliding; limits the tangential force to simulate energy loss due to friction. Default is 0.0.

  • stretch_compliance (float, optional) – The stretch compliance (m/N). Controls the softness of the stretch constraint between particles. Low values correspond to very stiff; enforces near-constant distance. High values correspond to softer response; more stretch allowed. Default is 0.0.

  • bending_compliance (float, optional) – The bending compliance (rad/N). Controls how easily the material bends (e.g., at the fold of a cloth or edge of a soft body). Appears in inner edge constraints, determining how strongly the shape resists changes in angle. Default is 0.0.

  • volume_compliance (float, optional) – The volume compliance (m^3/N). Determines how compressible a tetrahedral element is. Used in volume preservation constraints in 3D elastic or soft materials. Default is 0.0.

  • stretch_relaxation (float, optional) – The stretch relaxation. Smaller value weakens the stretch constraint. Default is 0.1.

  • bending_relaxation (float, optional) – The bending relaxation. Smaller value weakens the bending constraint. Default is 0.1.

  • volume_relaxation (float, optional) – The volume relaxation. Smaller value weakens the bending constraint. Default is 0.1.

property rho#

The density of the elastic material (kg/m^3).

property static_friction#

Static friction coefficient.

property kinetic_friction#

Kinetic friction coefficient.

property stretch_compliance#

The stretch compliance.

property bending_compliance#

The bending compliance.

property volume_compliance#

The volume compliance.

property stretch_relaxation#

The stretch relaxation.

property bending_relaxation#

The bending relaxation.

property volume_relaxation#

The volume relaxation.