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1/*************************************************************************
2 * *
3 * Open Dynamics Engine, Copyright (C) 2001,2002 Russell L. Smith. *
4 * All rights reserved. Email: russ@q12.org Web: www.q12.org *
5 * *
6 * This library is free software; you can redistribute it and/or *
7 * modify it under the terms of EITHER: *
8 * (1) The GNU Lesser General Public License as published by the Free *
9 * Software Foundation; either version 2.1 of the License, or (at *
10 * your option) any later version. The text of the GNU Lesser *
11 * General Public License is included with this library in the *
12 * file LICENSE.TXT. *
13 * (2) The BSD-style license that is included with this library in *
14 * the file LICENSE-BSD.TXT. *
15 * *
16 * This library is distributed in the hope that it will be useful, *
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the files *
19 * LICENSE.TXT and LICENSE-BSD.TXT for more details. *
20 * *
21 *************************************************************************/
22
23#ifndef _ODE_MASS_H_
24#define _ODE_MASS_H_
25
26#include <ode/common.h>
27
28#ifdef __cplusplus
29extern "C" {
30#endif
31
32struct dMass;
33typedef struct dMass dMass;
34
35/**
36 * Check if a mass structure has valid value.
37 * The function check if the mass and innertia matrix are positive definits
38 *
39 * @param m A mass structure to check
40 *
41 * @return 1 if both codition are met
42 */
43ODE_API int dMassCheck(const dMass *m);
44
45ODE_API void dMassSetZero (dMass *);
46
47ODE_API void dMassSetParameters (dMass *, dReal themass,
48 dReal cgx, dReal cgy, dReal cgz,
49 dReal I11, dReal I22, dReal I33,
50 dReal I12, dReal I13, dReal I23);
51
52ODE_API void dMassSetSphere (dMass *, dReal density, dReal radius);
53ODE_API void dMassSetSphereTotal (dMass *, dReal total_mass, dReal radius);
54
55ODE_API void dMassSetCapsule (dMass *, dReal density, int direction,
56 dReal radius, dReal length);
57ODE_API void dMassSetCapsuleTotal (dMass *, dReal total_mass, int direction,
58 dReal radius, dReal length);
59
60ODE_API void dMassSetCylinder (dMass *, dReal density, int direction,
61 dReal radius, dReal length);
62ODE_API void dMassSetCylinderTotal (dMass *, dReal total_mass, int direction,
63 dReal radius, dReal length);
64
65ODE_API void dMassSetBox (dMass *, dReal density,
66 dReal lx, dReal ly, dReal lz);
67ODE_API void dMassSetBoxTotal (dMass *, dReal total_mass,
68 dReal lx, dReal ly, dReal lz);
69
70ODE_API void dMassSetTrimesh (dMass *, dReal density, dGeomID g);
71
72ODE_API void dMassSetTrimeshTotal (dMass *m, dReal total_mass, dGeomID g);
73
74ODE_API void dMassAdjust (dMass *, dReal newmass);
75
76ODE_API void dMassTranslate (dMass *, dReal x, dReal y, dReal z);
77
78ODE_API void dMassRotate (dMass *, const dMatrix3 R);
79
80ODE_API void dMassAdd (dMass *a, const dMass *b);
81
82// Backwards compatible API
83#define dMassSetCappedCylinder dMassSetCapsule
84#define dMassSetCappedCylinderTotal dMassSetCapsuleTotal
85
86
87struct dMass {
88 dReal mass;
89 dVector4 c;
90 dMatrix3 I;
91
92#ifdef __cplusplus
93 dMass()
94 { dMassSetZero (this); }
95 void setZero()
96 { dMassSetZero (this); }
97 void setParameters (dReal themass, dReal cgx, dReal cgy, dReal cgz,
98 dReal I11, dReal I22, dReal I33,
99 dReal I12, dReal I13, dReal I23)
100 { dMassSetParameters (this,themass,cgx,cgy,cgz,I11,I22,I33,I12,I13,I23); }
101 void setSphere (dReal density, dReal radius)
102 { dMassSetSphere (this,density,radius); }
103 void setCapsule (dReal density, int direction, dReal a, dReal b)
104 { dMassSetCappedCylinder (this,density,direction,a,b); }
105 void setCappedCylinder (dReal density, int direction, dReal a, dReal b)
106 { setCapsule(density, direction, a, b); }
107 void setBox (dReal density, dReal lx, dReal ly, dReal lz)
108 { dMassSetBox (this,density,lx,ly,lz); }
109 void adjust (dReal newmass)
110 { dMassAdjust (this,newmass); }
111 void translate (dReal x, dReal y, dReal z)
112 { dMassTranslate (this,x,y,z); }
113 void rotate (const dMatrix3 R)
114 { dMassRotate (this,R); }
115 void add (const dMass *b)
116 { dMassAdd (this,b); }
117#endif
118};
119
120
121#ifdef __cplusplus
122}
123#endif
124
125#endif