step/stepcore

coulombforce.h

00001 /* This file is part of StepCore library.
00002    Copyright (C) 2007 Vladimir Kuznetsov <ks.vladimir@gmail.com>
00003 
00004    StepCore library is free software; you can redistribute it and/or modify
00005    it under the terms of the GNU General Public License as published by
00006    the Free Software Foundation; either version 2 of the License, or
00007    (at your option) any later version.
00008 
00009    StepCore library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012    GNU General Public License for more details.
00013 
00014    You should have received a copy of the GNU General Public License
00015    along with StepCore; if not, write to the Free Software
00016    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
00017 */
00018 
00023 #ifndef STEPCORE_COULOMBFORCE_H
00024 #define STEPCORE_COULOMBFORCE_H
00025 
00026 #include "world.h"
00027 #include "object.h"
00028 #include "constants.h"
00029 
00030 namespace StepCore
00031 {
00032 
00033 class CoulombForce;
00034 
00038 class CoulombForceErrors: public ObjectErrors
00039 {
00040     STEPCORE_OBJECT(CoulombForceErrors)
00041 
00042 public:
00044     CoulombForceErrors(Item* owner = NULL)
00045         : ObjectErrors(owner), _coulombConstVariance(0) {}
00046 
00048     CoulombForce* coulombForce() const;
00049 
00051     double coulombConstVariance() const { return _coulombConstVariance; }
00053     void   setCoulombConstVariance(double coulombConstVariance) {
00054         _coulombConstVariance = coulombConstVariance; }
00055 
00056 protected:
00057     double _coulombConstVariance;
00058     friend class CoulombForce;
00059 };
00060 
00061 
00082 class CoulombForce: public Item, public Force
00083 {
00084     STEPCORE_OBJECT(CoulombForce)
00085 
00086 public:
00088     CoulombForce(double coulombConst = Constants::Coulomb);
00089 
00090     void calcForce(bool calcVariances);
00091 
00093     double coulombConst() const { return _coulombConst; }
00095     void   setCoulombConst(double coulombConst) { _coulombConst = coulombConst; }
00096 
00098     CoulombForceErrors* coulombForceErrors() {
00099         return static_cast<CoulombForceErrors*>(objectErrors()); }
00100 
00101 protected:
00102     ObjectErrors* createObjectErrors() { return new CoulombForceErrors(this); }
00103 
00104     double _coulombConst;
00105 };
00106 
00107 } // namespace StepCore
00108 
00109 #endif
00110
step/stepcore

coulombforce.h

step/stepcore

kdeedu
