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Force_MobilityLinearDamper.h
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1 #ifndef SimTK_SIMBODY_FORCE_MOBILITY_LINEAR_DAMPER_H_
2 #define SimTK_SIMBODY_FORCE_MOBILITY_LINEAR_DAMPER_H_
3 
4 /* -------------------------------------------------------------------------- *
5  * Simbody(tm) *
6  * -------------------------------------------------------------------------- *
7  * This is part of the SimTK biosimulation toolkit originating from *
8  * Simbios, the NIH National Center for Physics-Based Simulation of *
9  * Biological Structures at Stanford, funded under the NIH Roadmap for *
10  * Medical Research, grant U54 GM072970. See https://simtk.org/home/simbody. *
11  * *
12  * Portions copyright (c) 2008-13 Stanford University and the Authors. *
13  * Authors: Peter Eastman, Michael Sherman *
14  * Contributors: *
15  * *
16  * Licensed under the Apache License, Version 2.0 (the "License"); you may *
17  * not use this file except in compliance with the License. You may obtain a *
18  * copy of the License at http://www.apache.org/licenses/LICENSE-2.0. *
19  * *
20  * Unless required by applicable law or agreed to in writing, software *
21  * distributed under the License is distributed on an "AS IS" BASIS, *
22  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
23  * See the License for the specific language governing permissions and *
24  * limitations under the License. *
25  * -------------------------------------------------------------------------- */
26 
27 #include "SimTKcommon.h"
28 #include "simbody/internal/Force.h"
29 
35 namespace SimTK {
36 
47 public:
62  const MobilizedBody& mobod,
63  MobilizerUIndex whichU,
64  Real defaultDamping);
65 
69 
82  MobilityLinearDamper& setDefaultDamping(Real defaultDamping);
83 
87  Real getDefaultDamping() const;
88 
102  const MobilityLinearDamper& setDamping(State& state,
103  Real damping) const;
104 
110  Real getDamping(const State& state) const;
111 
120  const MobilizedBody& mobod,
121  int whichU,
122  Real defaultDamping)
123  { // Invoke the other constructor.
124  new(this) MobilityLinearDamper(forces, mobod, MobilizerUIndex(whichU),
125  defaultDamping);
126  }
131  MobilityLinearDamperImpl, Force);
133 };
134 
135 } // namespace SimTK
136 
137 #endif // SimTK_SIMBODY_FORCE_MOBILITY_LINEAR_DAMPER_H_
This is the base class from which all Force element handle classes derive.
Definition: Force.h:50
This is the top-level SimTK namespace into which all SimTK names are placed to avoid collision with o...
Definition: Assembler.h:37
MobilityLinearDamper()
Default constructor creates an empty handle that can be assigned to refer to any MobilityLinearDamper...
Definition: Force_MobilityLinearDamper.h:68
SimTK_Real Real
This is the default compiled-in floating point type for SimTK, either float or double.
Definition: SimTKcommon/include/SimTKcommon/internal/common.h:577
This object is intended to contain all state information for a SimTK::System, except topological info...
Definition: State.h:276
Includes internal headers providing declarations for the basic SimTK Core classes, including Simmatrix.
#define SimTK_INSERT_DERIVED_HANDLE_DECLARATIONS(DERIVED, DERIVED_IMPL, PARENT)
Definition: PrivateImplementation.h:343
MobilityLinearDamper(GeneralForceSubsystem &forces, const MobilizedBody &mobod, int whichU, Real defaultDamping)
Deprecated: Alternate signature for backwards compatibilty – for safety you should prefer using the ...
Definition: Force_MobilityLinearDamper.h:119
This is a concrete subsystem which can apply arbitrary forces to a MultibodySystem.
Definition: GeneralForceSubsystem.h:47
#define SimTK_SIMBODY_EXPORT
Definition: Simbody/include/simbody/internal/common.h:72
A linear damper that acts along or around a mobility coordinate to apply a generalized force there...
Definition: Force_MobilityLinearDamper.h:46
A MobilizedBody is Simbody's fundamental body-and-joint object used to parameterize a system's motion...
Definition: MobilizedBody.h:167
The Mobilizer associated with each MobilizedBody, once modeled, has a specific number of generalized ...