1 |
/* |
2 |
* Copyright (C) 2000-2004 Object Oriented Parallel Simulation Engine (OOPSE) project |
3 |
* |
4 |
* Contact: oopse@oopse.org |
5 |
* |
6 |
* This program is free software; you can redistribute it and/or |
7 |
* modify it under the terms of the GNU Lesser General Public License |
8 |
* as published by the Free Software Foundation; either version 2.1 |
9 |
* of the License, or (at your option) any later version. |
10 |
* All we ask is that proper credit is given for our work, which includes |
11 |
* - but is not limited to - adding the above copyright notice to the beginning |
12 |
* of your source code files, and to any copyright notice that you may distribute |
13 |
* with programs based on this work. |
14 |
* |
15 |
* This program is distributed in the hope that it will be useful, |
16 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
17 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
18 |
* GNU Lesser General Public License for more details. |
19 |
* |
20 |
* You should have received a copy of the GNU Lesser General Public License |
21 |
* along with this program; if not, write to the Free Software |
22 |
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
23 |
* |
24 |
*/ |
25 |
|
26 |
/** |
27 |
* @file QuadraticBendType.hpp |
28 |
* @author tlin |
29 |
* @date 11/01/2004 |
30 |
* @version 1.0 |
31 |
*/ |
32 |
|
33 |
#ifndef TYPES_QUARTICBENDTYPE_HPP |
34 |
#define TYPES_QUARTICBENDTYPE_HPP |
35 |
|
36 |
#include "types/BendType.hpp" |
37 |
|
38 |
namespace oopse { |
39 |
/** |
40 |
* @class QuarticBendType |
41 |
* @todo document |
42 |
*/ |
43 |
class QuarticBendType : public BendType { |
44 |
|
45 |
public: |
46 |
|
47 |
QuarticBendType(double r0, double k4, double k3, double k2, double k1, double k0) |
48 |
: BendType(r0), k4_(k4), k3_(k3), k2_(k2), k1_(k1), k0_(k0){ |
49 |
} |
50 |
|
51 |
void setForceConstant(double k4, double k3, double k2, double k1, double k0) { |
52 |
k4_ = k4; |
53 |
k3_ = k3; |
54 |
k2_ = k2; |
55 |
k1_ = k1; |
56 |
k0_ = k0; |
57 |
|
58 |
} |
59 |
|
60 |
void getForceConstant(double& k4, double& k3, double& k2, double& k1, double& k0) { |
61 |
k4 = k4_; |
62 |
k3 = k3_; |
63 |
k2 = k2_; |
64 |
k1 = k1_; |
65 |
k0 = k0_; |
66 |
} |
67 |
|
68 |
virtual void calcForce(double theta, double& V, double& dVdTheta) { |
69 |
double delta = theta- theta0_; |
70 |
double delta2 = delta * delta; |
71 |
double delta3 = delta2 * delta; |
72 |
double delta4 = delta3 * delta; |
73 |
|
74 |
V =k0_ + k1_ * delta + k2_*delta2 + k3_*delta3 + k4_*delta4; |
75 |
dVdTheta = k1_ + 2.0*k2_ * delta + 3.0 * k3_*delta2 + 4.0*k4_*delta3; |
76 |
} |
77 |
|
78 |
private: |
79 |
|
80 |
double k4_; |
81 |
double k3_; |
82 |
double k2_; |
83 |
double k1_; |
84 |
double k0_; |
85 |
|
86 |
}; |
87 |
|
88 |
}//end namespace oopse |
89 |
#endif //TYPES_QUARTICBENDTYPE_HPP |