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Diffstat (limited to 'libraries/ode-0.9/ode/src/lcp.h')
-rw-r--r-- | libraries/ode-0.9/ode/src/lcp.h | 58 |
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diff --git a/libraries/ode-0.9/ode/src/lcp.h b/libraries/ode-0.9/ode/src/lcp.h deleted file mode 100644 index 484902c..0000000 --- a/libraries/ode-0.9/ode/src/lcp.h +++ /dev/null | |||
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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 | /* | ||
24 | |||
25 | given (A,b,lo,hi), solve the LCP problem: A*x = b+w, where each x(i),w(i) | ||
26 | satisfies one of | ||
27 | (1) x = lo, w >= 0 | ||
28 | (2) x = hi, w <= 0 | ||
29 | (3) lo < x < hi, w = 0 | ||
30 | A is a matrix of dimension n*n, everything else is a vector of size n*1. | ||
31 | lo and hi can be +/- dInfinity as needed. the first `nub' variables are | ||
32 | unbounded, i.e. hi and lo are assumed to be +/- dInfinity. | ||
33 | |||
34 | we restrict lo(i) <= 0 and hi(i) >= 0. | ||
35 | |||
36 | the original data (A,b) may be modified by this function. | ||
37 | |||
38 | if the `findex' (friction index) parameter is nonzero, it points to an array | ||
39 | of index values. in this case constraints that have findex[i] >= 0 are | ||
40 | special. all non-special constraints are solved for, then the lo and hi values | ||
41 | for the special constraints are set: | ||
42 | hi[i] = abs( hi[i] * x[findex[i]] ) | ||
43 | lo[i] = -hi[i] | ||
44 | and the solution continues. this mechanism allows a friction approximation | ||
45 | to be implemented. the first `nub' variables are assumed to have findex < 0. | ||
46 | |||
47 | */ | ||
48 | |||
49 | |||
50 | #ifndef _ODE_LCP_H_ | ||
51 | #define _ODE_LCP_H_ | ||
52 | |||
53 | |||
54 | void dSolveLCP (int n, dReal *A, dReal *x, dReal *b, dReal *w, | ||
55 | int nub, dReal *lo, dReal *hi, int *findex); | ||
56 | |||
57 | |||
58 | #endif | ||