iMSTK
Interactive Medical Simulation Toolkit
Public Member Functions | Public Attributes | List of all members
imstk::PbdInflatableDistanceConstraint Class Reference
Inheritance diagram for imstk::PbdInflatableDistanceConstraint:
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Collaboration diagram for imstk::PbdInflatableDistanceConstraint:
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Public Member Functions

void initConstraint (const Vec3d &p0, const Vec3d &p1, const PbdParticleId &pIdx0, const PbdParticleId &pIdx1, const double k=1e5)
 Initializes the inflatable distance constraint.
 
void projectConstraint (PbdState &bodies, const double dt, const SolverType &type) override
 Apply diffusion and update positions.
 
void setRestLength (const double restLength)
 
const double getRestLength () const
 
void setInitRestLength (const double initRestLength)
 
const double getInitRestLength () const
 
void resetRestLength ()
 Reset constraint rest measurement.
 
void resetStiffness ()
 
bool isInflated () const
 
void setInflated ()
 
- Public Member Functions inherited from imstk::PbdDistanceConstraint
void initConstraint (const Vec3d &p0, const Vec3d &p1, const PbdParticleId &pIdx0, const PbdParticleId &pIdx1, const double k=1e5)
 Initialize the constraint with resting length as the length between the two points.
 
void initConstraint (const double restLength, const PbdParticleId &pIdx0, const PbdParticleId &pIdx1, const double k=1e5)
 Initialize the constraint with provided resting length.
 
bool computeValueAndGradient (PbdState &bodies, double &c, std::vector< Vec3d > &dcdx) override
 Compute value and gradient of the constraint. More...
 
double getRestValue () const
 Return the rest configuration for the constraint.
 
- Public Member Functions inherited from imstk::PbdConstraint
virtual const std::string getTypeName () const =0
 
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)
 

Public Attributes

double m_initialRestLength = 0.0
 
double m_initialStiffness = 1.0
 
double m_diffusionRate = 0.00001
 
bool m_inflated = false
 
- Public Attributes inherited from imstk::PbdDistanceConstraint
double m_restLength = 0.0
 Rest length between the nodes.
 

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< PbdParticleIdm_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

Definition at line 17 of file imstkPbdInflatableDistanceConstraint.h.


The documentation for this class was generated from the following file: