diff options
Diffstat (limited to 'libraries/ode-0.9/contrib/BreakableJoints/test_buggy.cpp')
-rw-r--r-- | libraries/ode-0.9/contrib/BreakableJoints/test_buggy.cpp | 327 |
1 files changed, 327 insertions, 0 deletions
diff --git a/libraries/ode-0.9/contrib/BreakableJoints/test_buggy.cpp b/libraries/ode-0.9/contrib/BreakableJoints/test_buggy.cpp new file mode 100644 index 0000000..1dc0ab3 --- /dev/null +++ b/libraries/ode-0.9/contrib/BreakableJoints/test_buggy.cpp | |||
@@ -0,0 +1,327 @@ | |||
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 | /* | ||
24 | |||
25 | buggy with suspension. | ||
26 | this also shows you how to use geom groups. | ||
27 | |||
28 | */ | ||
29 | |||
30 | |||
31 | #include <ode/ode.h> | ||
32 | #include <drawstuff/drawstuff.h> | ||
33 | |||
34 | #ifdef _MSC_VER | ||
35 | #pragma warning(disable:4244 4305) // for VC++, no precision loss complaints | ||
36 | #endif | ||
37 | |||
38 | // select correct drawing functions | ||
39 | |||
40 | #ifdef dDOUBLE | ||
41 | #define dsDrawBox dsDrawBoxD | ||
42 | #define dsDrawSphere dsDrawSphereD | ||
43 | #define dsDrawCylinder dsDrawCylinderD | ||
44 | #define dsDrawCappedCylinder dsDrawCappedCylinderD | ||
45 | #endif | ||
46 | |||
47 | |||
48 | // some constants | ||
49 | |||
50 | #define LENGTH 0.7 // chassis length | ||
51 | #define WIDTH 0.5 // chassis width | ||
52 | #define HEIGHT 0.2 // chassis height | ||
53 | #define RADIUS 0.18 // wheel radius | ||
54 | #define STARTZ 0.5 // starting height of chassis | ||
55 | #define CMASS 1 // chassis mass | ||
56 | #define WMASS 0.2 // wheel mass | ||
57 | |||
58 | |||
59 | // dynamics and collision objects (chassis, 3 wheels, environment) | ||
60 | |||
61 | static dWorldID world; | ||
62 | static dSpaceID space; | ||
63 | static dBodyID body[4]; | ||
64 | static dJointID joint[3]; // joint[0] is the front wheel | ||
65 | static dJointGroupID contactgroup; | ||
66 | static dGeomID ground; | ||
67 | static dSpaceID car_space; | ||
68 | static dGeomID box[1]; | ||
69 | static dGeomID sphere[3]; | ||
70 | static dGeomID ground_box; | ||
71 | |||
72 | |||
73 | // things that the user controls | ||
74 | |||
75 | static dReal speed=0,steer=0; // user commands | ||
76 | |||
77 | |||
78 | |||
79 | // this is called by dSpaceCollide when two objects in space are | ||
80 | // potentially colliding. | ||
81 | |||
82 | static void nearCallback (void *data, dGeomID o1, dGeomID o2) | ||
83 | { | ||
84 | int i,n; | ||
85 | |||
86 | // only collide things with the ground | ||
87 | int g1 = (o1 == ground || o1 == ground_box); | ||
88 | int g2 = (o2 == ground || o2 == ground_box); | ||
89 | if (!(g1 ^ g2)) return; | ||
90 | |||
91 | const int N = 10; | ||
92 | dContact contact[N]; | ||
93 | n = dCollide (o1,o2,N,&contact[0].geom,sizeof(dContact)); | ||
94 | if (n > 0) { | ||
95 | for (i=0; i<n; i++) { | ||
96 | contact[i].surface.mode = dContactSlip1 | dContactSlip2 | | ||
97 | dContactSoftERP | dContactSoftCFM | dContactApprox1; | ||
98 | contact[i].surface.mu = dInfinity; | ||
99 | contact[i].surface.slip1 = 0.1; | ||
100 | contact[i].surface.slip2 = 0.1; | ||
101 | contact[i].surface.soft_erp = 0.5; | ||
102 | contact[i].surface.soft_cfm = 0.3; | ||
103 | dJointID c = dJointCreateContact (world,contactgroup,&contact[i]); | ||
104 | dJointAttach (c, | ||
105 | dGeomGetBody(contact[i].geom.g1), | ||
106 | dGeomGetBody(contact[i].geom.g2)); | ||
107 | } | ||
108 | } | ||
109 | } | ||
110 | |||
111 | |||
112 | // start simulation - set viewpoint | ||
113 | |||
114 | static void start() | ||
115 | { | ||
116 | static float xyz[3] = {0.8317f,-0.9817f,0.8000f}; | ||
117 | static float hpr[3] = {121.0000f,-27.5000f,0.0000f}; | ||
118 | dsSetViewpoint (xyz,hpr); | ||
119 | printf ("Press:\t'a' to increase speed.\n" | ||
120 | "\t'z' to decrease speed.\n" | ||
121 | "\t',' to steer left.\n" | ||
122 | "\t'.' to steer right.\n" | ||
123 | "\t' ' to reset speed and steering.\n"); | ||
124 | } | ||
125 | |||
126 | |||
127 | // called when a key pressed | ||
128 | |||
129 | static void command (int cmd) | ||
130 | { | ||
131 | switch (cmd) { | ||
132 | case 'a': case 'A': | ||
133 | speed += 0.3; | ||
134 | break; | ||
135 | case 'z': case 'Z': | ||
136 | speed -= 0.3; | ||
137 | break; | ||
138 | case ',': | ||
139 | steer -= 0.5; | ||
140 | break; | ||
141 | case '.': | ||
142 | steer += 0.5; | ||
143 | break; | ||
144 | case ' ': | ||
145 | speed = 0; | ||
146 | steer = 0; | ||
147 | break; | ||
148 | } | ||
149 | } | ||
150 | |||
151 | |||
152 | // simulation loop | ||
153 | |||
154 | static void simLoop (int pause) | ||
155 | { | ||
156 | int i; | ||
157 | if (!pause) { | ||
158 | // motor | ||
159 | dJointSetHinge2Param (joint[0],dParamVel2,-speed); | ||
160 | dJointSetHinge2Param (joint[0],dParamFMax2,0.1); | ||
161 | |||
162 | // steering | ||
163 | dReal v = steer - dJointGetHinge2Angle1 (joint[0]); | ||
164 | if (v > 0.1) v = 0.1; | ||
165 | if (v < -0.1) v = -0.1; | ||
166 | v *= 10.0; | ||
167 | dJointSetHinge2Param (joint[0],dParamVel,v); | ||
168 | dJointSetHinge2Param (joint[0],dParamFMax,0.2); | ||
169 | dJointSetHinge2Param (joint[0],dParamLoStop,-0.75); | ||
170 | dJointSetHinge2Param (joint[0],dParamHiStop,0.75); | ||
171 | dJointSetHinge2Param (joint[0],dParamFudgeFactor,0.1); | ||
172 | |||
173 | dSpaceCollide (space,0,&nearCallback); | ||
174 | dWorldStep (world,0.05); | ||
175 | |||
176 | // remove all contact joints | ||
177 | dJointGroupEmpty (contactgroup); | ||
178 | } | ||
179 | |||
180 | dsSetColor (0,1,1); | ||
181 | dsSetTexture (DS_WOOD); | ||
182 | dReal sides[3] = {LENGTH,WIDTH,HEIGHT}; | ||
183 | dsDrawBox (dBodyGetPosition(body[0]),dBodyGetRotation(body[0]),sides); | ||
184 | dsSetColor (1,1,1); | ||
185 | for (i=1; i<=3; i++) dsDrawCylinder (dBodyGetPosition(body[i]), | ||
186 | dBodyGetRotation(body[i]),0.02f,RADIUS); | ||
187 | |||
188 | dVector3 ss; | ||
189 | dGeomBoxGetLengths (ground_box,ss); | ||
190 | dsDrawBox (dGeomGetPosition(ground_box),dGeomGetRotation(ground_box),ss); | ||
191 | |||
192 | /* | ||
193 | printf ("%.10f %.10f %.10f %.10f\n", | ||
194 | dJointGetHingeAngle (joint[1]), | ||
195 | dJointGetHingeAngle (joint[2]), | ||
196 | dJointGetHingeAngleRate (joint[1]), | ||
197 | dJointGetHingeAngleRate (joint[2])); | ||
198 | */ | ||
199 | } | ||
200 | |||
201 | |||
202 | int main (int argc, char **argv) | ||
203 | { | ||
204 | int i; | ||
205 | dMass m; | ||
206 | |||
207 | // setup pointers to drawstuff callback functions | ||
208 | dsFunctions fn; | ||
209 | fn.version = DS_VERSION; | ||
210 | fn.start = &start; | ||
211 | fn.step = &simLoop; | ||
212 | fn.command = &command; | ||
213 | fn.stop = 0; | ||
214 | fn.path_to_textures = "../../drawstuff/textures"; | ||
215 | if(argc==2) | ||
216 | { | ||
217 | fn.path_to_textures = argv[1]; | ||
218 | } | ||
219 | |||
220 | // create world | ||
221 | |||
222 | world = dWorldCreate(); | ||
223 | space = dHashSpaceCreate (0); | ||
224 | contactgroup = dJointGroupCreate (0); | ||
225 | dWorldSetGravity (world,0,0,-0.5); | ||
226 | ground = dCreatePlane (space,0,0,1,0); | ||
227 | |||
228 | // chassis body | ||
229 | body[0] = dBodyCreate (world); | ||
230 | dBodySetPosition (body[0],0,0,STARTZ); | ||
231 | dMassSetBox (&m,1,LENGTH,WIDTH,HEIGHT); | ||
232 | dMassAdjust (&m,CMASS); | ||
233 | dBodySetMass (body[0],&m); | ||
234 | box[0] = dCreateBox (0,LENGTH,WIDTH,HEIGHT); | ||
235 | dGeomSetBody (box[0],body[0]); | ||
236 | |||
237 | // wheel bodies | ||
238 | for (i=1; i<=3; i++) { | ||
239 | body[i] = dBodyCreate (world); | ||
240 | dQuaternion q; | ||
241 | dQFromAxisAndAngle (q,1,0,0,M_PI*0.5); | ||
242 | dBodySetQuaternion (body[i],q); | ||
243 | dMassSetSphere (&m,1,RADIUS); | ||
244 | dMassAdjust (&m,WMASS); | ||
245 | dBodySetMass (body[i],&m); | ||
246 | sphere[i-1] = dCreateSphere (0,RADIUS); | ||
247 | dGeomSetBody (sphere[i-1],body[i]); | ||
248 | } | ||
249 | dBodySetPosition (body[1],0.5*LENGTH,0,STARTZ-HEIGHT*0.5); | ||
250 | dBodySetPosition (body[2],-0.5*LENGTH, WIDTH*0.5,STARTZ-HEIGHT*0.5); | ||
251 | dBodySetPosition (body[3],-0.5*LENGTH,-WIDTH*0.5,STARTZ-HEIGHT*0.5); | ||
252 | |||
253 | // front wheel hinge | ||
254 | /* | ||
255 | joint[0] = dJointCreateHinge2 (world,0); | ||
256 | dJointAttach (joint[0],body[0],body[1]); | ||
257 | const dReal *a = dBodyGetPosition (body[1]); | ||
258 | dJointSetHinge2Anchor (joint[0],a[0],a[1],a[2]); | ||
259 | dJointSetHinge2Axis1 (joint[0],0,0,1); | ||
260 | dJointSetHinge2Axis2 (joint[0],0,1,0); | ||
261 | */ | ||
262 | |||
263 | // front and back wheel hinges | ||
264 | for (i=0; i<3; i++) { | ||
265 | joint[i] = dJointCreateHinge2 (world,0); | ||
266 | dJointAttach (joint[i],body[0],body[i+1]); | ||
267 | const dReal *a = dBodyGetPosition (body[i+1]); | ||
268 | dJointSetHinge2Anchor (joint[i],a[0],a[1],a[2]); | ||
269 | dJointSetHinge2Axis1 (joint[i],0,0,1); | ||
270 | dJointSetHinge2Axis2 (joint[i],0,1,0); | ||
271 | |||
272 | // breakable joints contribution | ||
273 | // the wheels can break | ||
274 | dJointSetBreakable (joint[i], 1); | ||
275 | // the wheels wil break at a specific force | ||
276 | dJointSetBreakMode (joint[i], dJOINT_BREAK_AT_B1_FORCE|dJOINT_BREAK_AT_B2_FORCE); | ||
277 | // specify the force for the first body connected to the joint ... | ||
278 | dJointSetBreakForce (joint[i], 0, 1.5, 1.5, 1.5); | ||
279 | // and for the second body | ||
280 | dJointSetBreakForce (joint[i], 1, 1.5, 1.5, 1.5); | ||
281 | } | ||
282 | |||
283 | // set joint suspension | ||
284 | for (i=0; i<3; i++) { | ||
285 | dJointSetHinge2Param (joint[i],dParamSuspensionERP,0.4); | ||
286 | dJointSetHinge2Param (joint[i],dParamSuspensionCFM,0.8); | ||
287 | } | ||
288 | |||
289 | // lock back wheels along the steering axis | ||
290 | for (i=1; i<3; i++) { | ||
291 | // set stops to make sure wheels always stay in alignment | ||
292 | dJointSetHinge2Param (joint[i],dParamLoStop,0); | ||
293 | dJointSetHinge2Param (joint[i],dParamHiStop,0); | ||
294 | // the following alternative method is no good as the wheels may get out | ||
295 | // of alignment: | ||
296 | // dJointSetHinge2Param (joint[i],dParamVel,0); | ||
297 | // dJointSetHinge2Param (joint[i],dParamFMax,dInfinity); | ||
298 | } | ||
299 | |||
300 | // create car space and add it to the top level space | ||
301 | car_space = dSimpleSpaceCreate (space); | ||
302 | dSpaceSetCleanup (car_space,0); | ||
303 | dSpaceAdd (car_space,box[0]); | ||
304 | dSpaceAdd (car_space,sphere[0]); | ||
305 | dSpaceAdd (car_space,sphere[1]); | ||
306 | dSpaceAdd (car_space,sphere[2]); | ||
307 | |||
308 | // environment | ||
309 | ground_box = dCreateBox (space,2,1.5,1); | ||
310 | dMatrix3 R; | ||
311 | dRFromAxisAndAngle (R,0,1,0,-0.15); | ||
312 | dGeomSetPosition (ground_box,2,0,-0.34); | ||
313 | dGeomSetRotation (ground_box,R); | ||
314 | |||
315 | // run simulation | ||
316 | dsSimulationLoop (argc,argv,352,288,&fn); | ||
317 | |||
318 | dJointGroupDestroy (contactgroup); | ||
319 | dSpaceDestroy (space); | ||
320 | dWorldDestroy (world); | ||
321 | dGeomDestroy (box[0]); | ||
322 | dGeomDestroy (sphere[0]); | ||
323 | dGeomDestroy (sphere[1]); | ||
324 | dGeomDestroy (sphere[2]); | ||
325 | |||
326 | return 0; | ||
327 | } | ||