Implements the constant density constraint to simulate fluids. This constraint is global and applied to all vertices passed in during projection. More...
#include <imstkPbdConstantDensityConstraint.h>
Inheritance diagram for imstk::PbdConstantDensityConstraint:
Collaboration diagram for imstk::PbdConstantDensityConstraint:
Public Member Functions | |
| void | initConstraint (const int numParticles, const int bodyHandle, const double particleRadius, const double density) |
| Constant Density Constraint Initialization. More... | |
| void | projectConstraint (PbdState &bodies, const double dt, const SolverType &type) override |
| Solves the constant density constraint. | |
| bool | computeValueAndGradient (PbdState &imstkNotUsed(bodies), double &imstkNotUsed(c), std::vector< Vec3d > &imstkNotUsed(dcdx)) override |
| void | setDensity (const double density) |
| Set/Get rest density. | |
| double | getDensity () const |
 Public Member Functions inherited from imstk::PbdConstraint | |
| virtual const std::string | getTypeName () const =0 |
| virtual bool | computeValueAndGradient (PbdState &bodies, double &c, std::vector< Vec3d > &dcdx)=0 |
| Compute value and gradient of the constraint. More... | |
| std::vector< PbdParticleId > & | getParticles () |
| Get the vertex indices of the constraint. | |
| bool | getCorrectVelocity () const |
| Get/Set whether velocity should be corrected for this constraint. | |
| void | setCorrectVelocity (const bool correctVelocity) |
| const Vec3d & | getGradient (const int i) const |
| Get gradient given the particle index in constraint. | |
| double | getForce (const double dt) const |
| Get the force magnitude, valid after solving lambda Only valid with xpbd. | |
| double | getConstraintC () const |
| Get constraint value C (how much the constraint is violated) | |
| double | getLambda () const |
| Get constraint value C (how much the constraint is violated) | |
| void | zeroOutLambda () |
| Zero's out the lagrange multplier before integration only used for xpbd, must be called before solving. | |
| virtual void | correctVelocity (PbdState &bodies, const double dt) |
| Correct velocities according to friction and restitution Corrects according to the gradient direction. | |
| double | computeGeneralizedInvMass (const PbdState &bodies, const size_t particleIndex) const |
| Compute generalized inverse mass of the particle. Note perf sensitive function. It has been intentionally inlined. More... | |
| double | computeGeneralizedInvMass (const PbdState &bodies, const size_t particleIndex, const Vec3d &r) const |
| Compute generalized inverse mass of the particle. More... | |
| double | getRestitution () const |
| Get/Set restitution. | |
| void | setRestitution (const double restitution) |
| double | getFriction () const |
| Get/Set friction. | |
| void | setFriction (const double friction) |
| double | getStiffness () const |
| Get/Set the stiffness. | |
| void | setStiffness (const double stiffness) |
| double | getCompliance () const |
| Get/Set the compliance This function is also provided in case users need 0 compliance. | |
| void | setCompliance (const double compliance) |
Additional Inherited Members | |
| Public Types inherited from imstk::PbdConstraint | |
| enum | SolverType { xPBD = 0, PBD } |
| Type of solvers. | |
| Protected Member Functions inherited from imstk::PbdConstraint | |
| PbdConstraint (const size_t numParticles) | |
| Protected Attributes inherited from imstk::PbdConstraint | |
| std::vector< PbdParticleId > | m_particles |
| body, particle index | |
| std::vector< Vec3d > | m_dcdx |
| Normalized constraint gradients (per particle) | |
| double | m_stiffness = 1.0 |
| used in PBD, [0, 1] | |
| double | m_compliance = 1e-7 |
| used in xPBD, inverse of Stiffness | |
| double | m_lambda = 0.0 |
| Lagrange multiplier. | |
| double | m_C = 0.0 |
| Constraint Value. | |
| double | m_friction = 0.0 |
| double | m_restitution = 0.0 |
| bool | m_correctVelocity = false |
Detailed Description
Implements the constant density constraint to simulate fluids. This constraint is global and applied to all vertices passed in during projection.
Definition at line 21 of file imstkPbdConstantDensityConstraint.h.
Member Function Documentation
◆ initConstraint()
| void imstk::PbdConstantDensityConstraint::initConstraint | ( | const int | numParticles, |
| const int | bodyHandle, | ||
| const double | particleRadius, | ||
| const double | density | ||
| ) |
Constant Density Constraint Initialization.
- Parameters
-
Bodies containing all the particles the body index to simulate as a fluid stiffness
Definition at line 20 of file imstkPbdConstantDensityConstraint.cpp.
The documentation for this class was generated from the following files:
- Source/Constraint/PbdConstraints/imstkPbdConstantDensityConstraint.h
- Source/Constraint/PbdConstraints/imstkPbdConstantDensityConstraint.cpp
