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SingleStateAccessor.h
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SingleStateAccessor.h
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/******************************************************************************
* SOFA, Simulation Open-Framework Architecture *
* (c) 2006 INRIA, USTL, UJF, CNRS, MGH *
* *
* This program is free software; you can redistribute it and/or modify it *
* under the terms of the GNU Lesser General Public License as published by *
* the Free Software Foundation; either version 2.1 of the License, or (at *
* your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, but WITHOUT *
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or *
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License *
* for more details. *
* *
* You should have received a copy of the GNU Lesser General Public License *
* along with this program. If not, see <http://www.gnu.org/licenses/>. *
*******************************************************************************
* Authors: The SOFA Team and external contributors (see Authors.txt) *
* *
* Contact information: contact@sofa-framework.org *
******************************************************************************/
#pragma once
#include <sofa/core/behavior/StateAccessor.h>
#include <sofa/core/behavior/MechanicalState.h>
namespace sofa::core::behavior
{
/**
* Base class for components having access to one mechanical state with a specific template parameter, in order to read
* and/or write state variables.
*/
template<class DataTypes>
class SingleStateAccessor : public virtual StateAccessor
{
public:
SOFA_ABSTRACT_CLASS(SOFA_TEMPLATE(SingleStateAccessor, DataTypes), StateAccessor);
void init() override
{
Inherit1::init();
d_componentState.setValue(sofa::core::objectmodel::ComponentState::Valid);
if (!mstate.get())
{
mstate.set(dynamic_cast< MechanicalState<DataTypes>* >(getContext()->getMechanicalState()));
msg_error_when(!mstate) << "No compatible MechanicalState found in the current context. "
"This may be because there is no MechanicalState in the local context, "
"or because the type is not compatible.";
d_componentState.setValue(sofa::core::objectmodel::ComponentState::Invalid);
}
l_mechanicalStates.clear();
l_mechanicalStates.add(mstate);
}
MechanicalState<DataTypes>* getMState() { return mstate.get(); }
const MechanicalState<DataTypes>* getMState() const { return mstate.get(); }
protected:
explicit SingleStateAccessor(MechanicalState<DataTypes> *mm = nullptr)
: Inherit1()
, mstate(initLink("mstate", "MechanicalState used by this component"), mm)
{}
~SingleStateAccessor() override = default;
SingleLink<SingleStateAccessor<DataTypes>, MechanicalState<DataTypes>, BaseLink::FLAG_STRONGLINK> mstate;
};
}