from the start... checking in ode-0.9

1 files changed, 316 insertions, 0 deletions

diff --git a/libraries/ode-0.9/ode/src/rotation.cpp b/libraries/ode-0.9/ode/src/rotation.cpp
new file mode 100644
index 0000000..adb933b
--- /dev/null
+++ b/libraries/ode-0.9/ode/src/rotation.cpp
@@ -0,0 +1,316 @@
+/*************************************************************************
+ *                                                                       *
+ * Open Dynamics Engine, Copyright (C) 2001,2002 Russell L. Smith.       *
+ * All rights reserved.  Email: russ@q12.org   Web: www.q12.org          *
+ *                                                                       *
+ * This library is free software; you can redistribute it and/or         *
+ * modify it under the terms of EITHER:                                  *
+ *   (1) The GNU Lesser General Public License as published by the Free  *
+ *       Software Foundation; either version 2.1 of the License, or (at  *
+ *       your option) any later version. The text of the GNU Lesser      *
+ *       General Public License is included with this library in the     *
+ *       file LICENSE.TXT.                                               *
+ *   (2) The BSD-style license that is included with this library in     *
+ *       the file LICENSE-BSD.TXT.                                       *
+ *                                                                       *
+ * This library is distributed in the hope that it will be useful,       *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the files    *
+ * LICENSE.TXT and LICENSE-BSD.TXT for more details.                     *
+ *                                                                       *
+ *************************************************************************/
+
+/*
+
+quaternions have the format: (s,vx,vy,vz) where (vx,vy,vz) is the
+"rotation axis" and s is the "rotation angle".
+
+*/
+
+#include <ode/rotation.h>
+#include <ode/odemath.h>
+
+
+#define _R(i,j) R[(i)*4+(j)]
+
+#define SET_3x3_IDENTITY \
+  _R(0,0) = REAL(1.0); \
+  _R(0,1) = REAL(0.0); \
+  _R(0,2) = REAL(0.0); \
+  _R(0,3) = REAL(0.0); \
+  _R(1,0) = REAL(0.0); \
+  _R(1,1) = REAL(1.0); \
+  _R(1,2) = REAL(0.0); \
+  _R(1,3) = REAL(0.0); \
+  _R(2,0) = REAL(0.0); \
+  _R(2,1) = REAL(0.0); \
+  _R(2,2) = REAL(1.0); \
+  _R(2,3) = REAL(0.0);
+
+
+void dRSetIdentity (dMatrix3 R)
+{
+  dAASSERT (R);
+  SET_3x3_IDENTITY;
+}
+
+
+void dRFromAxisAndAngle (dMatrix3 R, dReal ax, dReal ay, dReal az,
+                         dReal angle)
+{
+  dAASSERT (R);
+  dQuaternion q;
+  dQFromAxisAndAngle (q,ax,ay,az,angle);
+  dQtoR (q,R);
+}
+
+
+void dRFromEulerAngles (dMatrix3 R, dReal phi, dReal theta, dReal psi)
+{
+  dReal sphi,cphi,stheta,ctheta,spsi,cpsi;
+  dAASSERT (R);
+  sphi = dSin(phi);
+  cphi = dCos(phi);
+  stheta = dSin(theta);
+  ctheta = dCos(theta);
+  spsi = dSin(psi);
+  cpsi = dCos(psi);
+  _R(0,0) = cpsi*ctheta;
+  _R(0,1) = spsi*ctheta;
+  _R(0,2) =-stheta;
+  _R(0,3) = REAL(0.0);
+  _R(1,0) = cpsi*stheta*sphi - spsi*cphi;
+  _R(1,1) = spsi*stheta*sphi + cpsi*cphi;
+  _R(1,2) = ctheta*sphi;
+  _R(1,3) = REAL(0.0);
+  _R(2,0) = cpsi*stheta*cphi + spsi*sphi;
+  _R(2,1) = spsi*stheta*cphi - cpsi*sphi;
+  _R(2,2) = ctheta*cphi;
+  _R(2,3) = REAL(0.0);
+}
+
+
+void dRFrom2Axes (dMatrix3 R, dReal ax, dReal ay, dReal az,
+                  dReal bx, dReal by, dReal bz)
+{
+  dReal l,k;
+  dAASSERT (R);
+  l = dSqrt (ax*ax + ay*ay + az*az);
+  if (l <= REAL(0.0)) {
+    dDEBUGMSG ("zero length vector");
+    return;
+  }
+  l = dRecip(l);
+  ax *= l;
+  ay *= l;
+  az *= l;
+  k = ax*bx + ay*by + az*bz;
+  bx -= k*ax;
+  by -= k*ay;
+  bz -= k*az;
+  l = dSqrt (bx*bx + by*by + bz*bz);
+  if (l <= REAL(0.0)) {
+    dDEBUGMSG ("zero length vector");
+    return;
+  }
+  l = dRecip(l);
+  bx *= l;
+  by *= l;
+  bz *= l;
+  _R(0,0) = ax;
+  _R(1,0) = ay;
+  _R(2,0) = az;
+  _R(0,1) = bx;
+  _R(1,1) = by;
+  _R(2,1) = bz;
+  _R(0,2) = - by*az + ay*bz;
+  _R(1,2) = - bz*ax + az*bx;
+  _R(2,2) = - bx*ay + ax*by;
+  _R(0,3) = REAL(0.0);
+  _R(1,3) = REAL(0.0);
+  _R(2,3) = REAL(0.0);
+}
+
+
+void dRFromZAxis (dMatrix3 R, dReal ax, dReal ay, dReal az)
+{
+  dVector3 n,p,q;
+  n[0] = ax;
+  n[1] = ay;
+  n[2] = az;
+  dNormalize3 (n);
+  dPlaneSpace (n,p,q);
+  _R(0,0) = p[0];
+  _R(1,0) = p[1];
+  _R(2,0) = p[2];
+  _R(0,1) = q[0];
+  _R(1,1) = q[1];
+  _R(2,1) = q[2];
+  _R(0,2) = n[0];
+  _R(1,2) = n[1];
+  _R(2,2) = n[2];
+  _R(0,3) = REAL(0.0);
+  _R(1,3) = REAL(0.0);
+  _R(2,3) = REAL(0.0);
+}
+
+
+void dQSetIdentity (dQuaternion q)
+{
+  dAASSERT (q);
+  q[0] = 1;
+  q[1] = 0;
+  q[2] = 0;
+  q[3] = 0;
+}
+
+
+void dQFromAxisAndAngle (dQuaternion q, dReal ax, dReal ay, dReal az,
+                         dReal angle)
+{
+  dAASSERT (q);
+  dReal l = ax*ax + ay*ay + az*az;
+  if (l > REAL(0.0)) {
+    angle *= REAL(0.5);
+    q[0] = dCos (angle);
+    l = dSin(angle) * dRecipSqrt(l);
+    q[1] = ax*l;
+    q[2] = ay*l;
+    q[3] = az*l;
+  }
+  else {
+    q[0] = 1;
+    q[1] = 0;
+    q[2] = 0;
+    q[3] = 0;
+  }
+}
+
+
+void dQMultiply0 (dQuaternion qa, const dQuaternion qb, const dQuaternion qc)
+{
+  dAASSERT (qa && qb && qc);
+  qa[0] = qb[0]*qc[0] - qb[1]*qc[1] - qb[2]*qc[2] - qb[3]*qc[3];
+  qa[1] = qb[0]*qc[1] + qb[1]*qc[0] + qb[2]*qc[3] - qb[3]*qc[2];
+  qa[2] = qb[0]*qc[2] + qb[2]*qc[0] + qb[3]*qc[1] - qb[1]*qc[3];
+  qa[3] = qb[0]*qc[3] + qb[3]*qc[0] + qb[1]*qc[2] - qb[2]*qc[1];
+}
+
+
+void dQMultiply1 (dQuaternion qa, const dQuaternion qb, const dQuaternion qc)
+{
+  dAASSERT (qa && qb && qc);
+  qa[0] = qb[0]*qc[0] + qb[1]*qc[1] + qb[2]*qc[2] + qb[3]*qc[3];
+  qa[1] = qb[0]*qc[1] - qb[1]*qc[0] - qb[2]*qc[3] + qb[3]*qc[2];
+  qa[2] = qb[0]*qc[2] - qb[2]*qc[0] - qb[3]*qc[1] + qb[1]*qc[3];
+  qa[3] = qb[0]*qc[3] - qb[3]*qc[0] - qb[1]*qc[2] + qb[2]*qc[1];
+}
+
+
+void dQMultiply2 (dQuaternion qa, const dQuaternion qb, const dQuaternion qc)
+{
+  dAASSERT (qa && qb && qc);
+  qa[0] =  qb[0]*qc[0] + qb[1]*qc[1] + qb[2]*qc[2] + qb[3]*qc[3];
+  qa[1] = -qb[0]*qc[1] + qb[1]*qc[0] - qb[2]*qc[3] + qb[3]*qc[2];
+  qa[2] = -qb[0]*qc[2] + qb[2]*qc[0] - qb[3]*qc[1] + qb[1]*qc[3];
+  qa[3] = -qb[0]*qc[3] + qb[3]*qc[0] - qb[1]*qc[2] + qb[2]*qc[1];
+}
+
+
+void dQMultiply3 (dQuaternion qa, const dQuaternion qb, const dQuaternion qc)
+{
+  dAASSERT (qa && qb && qc);
+  qa[0] =  qb[0]*qc[0] - qb[1]*qc[1] - qb[2]*qc[2] - qb[3]*qc[3];
+  qa[1] = -qb[0]*qc[1] - qb[1]*qc[0] + qb[2]*qc[3] - qb[3]*qc[2];
+  qa[2] = -qb[0]*qc[2] - qb[2]*qc[0] + qb[3]*qc[1] - qb[1]*qc[3];
+  qa[3] = -qb[0]*qc[3] - qb[3]*qc[0] + qb[1]*qc[2] - qb[2]*qc[1];
+}
+
+
+// dRfromQ(), dQfromR() and dDQfromW() are derived from equations in "An Introduction
+// to Physically Based Modeling: Rigid Body Simulation - 1: Unconstrained
+// Rigid Body Dynamics" by David Baraff, Robotics Institute, Carnegie Mellon
+// University, 1997.
+
+void dRfromQ (dMatrix3 R, const dQuaternion q)
+{
+  dAASSERT (q && R);
+  // q = (s,vx,vy,vz)
+  dReal qq1 = 2*q[1]*q[1];
+  dReal qq2 = 2*q[2]*q[2];
+  dReal qq3 = 2*q[3]*q[3];
+  _R(0,0) = 1 - qq2 - qq3;
+  _R(0,1) = 2*(q[1]*q[2] - q[0]*q[3]);
+  _R(0,2) = 2*(q[1]*q[3] + q[0]*q[2]);
+  _R(0,3) = REAL(0.0);
+  _R(1,0) = 2*(q[1]*q[2] + q[0]*q[3]);
+  _R(1,1) = 1 - qq1 - qq3;
+  _R(1,2) = 2*(q[2]*q[3] - q[0]*q[1]);
+  _R(1,3) = REAL(0.0);
+  _R(2,0) = 2*(q[1]*q[3] - q[0]*q[2]);
+  _R(2,1) = 2*(q[2]*q[3] + q[0]*q[1]);
+  _R(2,2) = 1 - qq1 - qq2;
+  _R(2,3) = REAL(0.0);
+}
+
+
+void dQfromR (dQuaternion q, const dMatrix3 R)
+{
+  dAASSERT (q && R);
+  dReal tr,s;
+  tr = _R(0,0) + _R(1,1) + _R(2,2);
+  if (tr >= 0) {
+    s = dSqrt (tr + 1);
+    q[0] = REAL(0.5) * s;
+    s = REAL(0.5) * dRecip(s);
+    q[1] = (_R(2,1) - _R(1,2)) * s;
+    q[2] = (_R(0,2) - _R(2,0)) * s;
+    q[3] = (_R(1,0) - _R(0,1)) * s;
+  }
+  else {
+    // find the largest diagonal element and jump to the appropriate case
+    if (_R(1,1) > _R(0,0)) {
+      if (_R(2,2) > _R(1,1)) goto case_2;
+      goto case_1;
+    }
+    if (_R(2,2) > _R(0,0)) goto case_2;
+    goto case_0;
+
+    case_0:
+    s = dSqrt((_R(0,0) - (_R(1,1) + _R(2,2))) + 1);
+    q[1] = REAL(0.5) * s;
+    s = REAL(0.5) * dRecip(s);
+    q[2] = (_R(0,1) + _R(1,0)) * s;
+    q[3] = (_R(2,0) + _R(0,2)) * s;
+    q[0] = (_R(2,1) - _R(1,2)) * s;
+    return;
+
+    case_1:
+    s = dSqrt((_R(1,1) - (_R(2,2) + _R(0,0))) + 1);
+    q[2] = REAL(0.5) * s;
+    s = REAL(0.5) * dRecip(s);
+    q[3] = (_R(1,2) + _R(2,1)) * s;
+    q[1] = (_R(0,1) + _R(1,0)) * s;
+    q[0] = (_R(0,2) - _R(2,0)) * s;
+    return;
+
+    case_2:
+    s = dSqrt((_R(2,2) - (_R(0,0) + _R(1,1))) + 1);
+    q[3] = REAL(0.5) * s;
+    s = REAL(0.5) * dRecip(s);
+    q[1] = (_R(2,0) + _R(0,2)) * s;
+    q[2] = (_R(1,2) + _R(2,1)) * s;
+    q[0] = (_R(1,0) - _R(0,1)) * s;
+    return;
+  }
+}
+
+
+void dDQfromW (dReal dq[4], const dVector3 w, const dQuaternion q)
+{
+  dAASSERT (w && q && dq);
+  dq[0] = REAL(0.5)*(- w[0]*q[1] - w[1]*q[2] - w[2]*q[3]);
+  dq[1] = REAL(0.5)*(  w[0]*q[0] + w[1]*q[3] - w[2]*q[2]);
+  dq[2] = REAL(0.5)*(- w[0]*q[3] + w[1]*q[0] + w[2]*q[1]);
+  dq[3] = REAL(0.5)*(  w[0]*q[2] - w[1]*q[1] + w[2]*q[0]);
+}