Description
Specialized class for representing a 3-DOF item for a system, that is a 3D point node, with mass matrix and associate variables (a 3 element vector, ex.speed)
#include <ChVariablesNode.h>
Public Member Functions | |
| ChVariablesNode & | operator= (const ChVariablesNode &other) |
| Assignment operator: copy from other object. | |
| double | GetNodeMass () const |
| Get the mass associated with translation of node. | |
| void | SetNodeMass (const double mmass) |
| Set the mass associated with translation of node. | |
| virtual int | Get_ndof () const override |
| The number of scalar variables in the vector qb (dof=degrees of freedom) | |
| void * | GetUserData () |
| void | SetUserData (void *mdata) |
| virtual void | Compute_invMb_v (ChVectorRef result, ChVectorConstRef vect) const override |
| Computes the product of the inverse mass matrix by a vector, and set in result: result = [invMb]*vect. | |
| virtual void | Compute_inc_invMb_v (ChVectorRef result, ChVectorConstRef vect) const override |
| Computes the product of the inverse mass matrix by a vector, and increment result: result += [invMb]*vect. | |
| virtual void | Compute_inc_Mb_v (ChVectorRef result, ChVectorConstRef vect) const override |
| Computes the product of the mass matrix by a vector, and set in result: result = [Mb]*vect. | |
| virtual void | MultiplyAndAdd (ChVectorRef result, ChVectorConstRef vect, const double c_a) const override |
| Computes the product of the corresponding block in the system matrix (ie. More... | |
| virtual void | DiagonalAdd (ChVectorRef result, const double c_a) const override |
| Add the diagonal of the mass matrix scaled by c_a, to 'result'. More... | |
| virtual void | Build_M (ChSparseMatrix &storage, int insrow, int inscol, const double c_a) override |
| Build the mass matrix (for these variables) scaled by c_a, storing it in 'storage' sparse matrix, at given column/row offset. More... | |
| virtual void | ArchiveOUT (ChArchiveOut &marchive) override |
| Method to allow serialization of transient data to archives. | |
| virtual void | ArchiveIN (ChArchiveIn &marchive) override |
| Method to allow de-serialization of transient data from archives. | |
 Public Member Functions inherited from chrono::ChVariables | |
| ChVariables (int m_ndof) | |
| ChVariables & | operator= (const ChVariables &other) |
| Assignment operator: copy from other object. | |
| void | SetDisabled (bool mdis) |
| Deactivates/freezes the variable (these variables won't be modified by the system solver). | |
| bool | IsDisabled () const |
| Check if the variables have been deactivated (these variables won't be modified by the system solver). | |
| bool | IsActive () const |
| Check if these variables are currently active. More... | |
| ChVectorRef | Get_qb () |
| Returns reference to qb, body-relative part of degrees of freedom q in system: More... | |
| virtual void | Compute_fb () |
| Compute fb, body-relative part of known vector f in system. More... | |
| ChVectorRef | Get_fb () |
| Returns reference to fb, body-relative part of known vector f in system. More... | |
| void | SetOffset (int moff) |
| Set offset in global q vector (set automatically by ChSystemDescriptor) | |
| int | GetOffset () const |
| Get offset in global q vector. | |
Additional Inherited Members | |
| Protected Attributes inherited from chrono::ChVariables | |
| int | offset |
| offset in global q state vector (needed by some solvers) | |
Member Function Documentation
◆ Build_M()
|
overridevirtual |
Build the mass matrix (for these variables) scaled by c_a, storing it in 'storage' sparse matrix, at given column/row offset.
Note, most iterative solvers don't need to know mass matrix explicitly. Optimized: doesn't fill unneeded elements except mass.
Implements chrono::ChVariables.
◆ DiagonalAdd()
|
overridevirtual |
Add the diagonal of the mass matrix scaled by c_a, to 'result'.
NOTE: the 'result' vector must already have the size of system unknowns, ie the size of the total variables & constraints in the system; the procedure will use the ChVariable offset (that must be already updated) as index.
Implements chrono::ChVariables.
◆ MultiplyAndAdd()
|
overridevirtual |
Computes the product of the corresponding block in the system matrix (ie.
the mass matrix) by 'vect', scale by c_a, and add to 'result'. NOTE: the 'vect' and 'result' vectors must already have the size of the total variables&constraints in the system; the procedure will use the ChVariable offsets (that must be already updated) to know the indexes in result and vect.
Implements chrono::ChVariables.
The documentation for this class was generated from the following files:
- /builds/uwsbel/chrono/src/chrono/solver/ChVariablesNode.h
- /builds/uwsbel/chrono/src/chrono/solver/ChVariablesNode.cpp
