C4X4Matrix C7Vector::getMatrix() const
{
return(C4X4Matrix(Q.getMatrix(),X));
}
C4X4Matrix C4X4Matrix::operator* (const CMatrix& m) const
{
C4X4Matrix retM((*this)*C4X4Matrix(m));
return(retM);
}
CIKChain::CIKChain(CIKDummy* tip,float interpolFact,int jointNbToExclude)
{
tooltip=tip;
chainIsValid=true;
// interpolFact is the interpolation factor we use to compute the target pose:
// interpolPose=tooltipPose*(1-interpolFact)+targetPose*interpolFact
// We get the jacobian and the rowJointIDs:
C4X4Matrix oldMatr;
int theConstraints=tip->constraints;
tip->baseReorient.setIdentity();
CMatrix* Ja=NULL;
if (tip->loopClosureDummy)
{
// The purpose of the following code is to have tip and target dummies reoriented
// and the appropriate constraints calculated automatically (only for loop closure dummies!)
tip->constraints=0;
int posDimensions=0;
int orDimensions=0;
C3Vector firstJointZAxis(0.0f,0.0f,1.0f);
C4X4Matrix firstJointCumul;
// here we reorient tip and targetCumulativeMatrix
// 1. We find the first revolute joint:
CIKObject* iterat=tip->parent;
while (iterat!=NULL)
{
if ( (iterat->objectType==IK_JOINT_TYPE)&&((CIKJoint*)iterat)->revolute&&((CIKJoint*)iterat)->active )
break;
iterat=iterat->parent;
}
if (iterat!=NULL)
{ // We have the first revolute joint from tip
orDimensions=1;
CIKObject* firstJoint=iterat;
firstJointCumul=C4X4Matrix(firstJoint->getCumulativeTransformationPart1(true).getMatrix());
firstJointZAxis=firstJointCumul.M.axis[2];
C3Vector normalVect;
// We search for a second revolute joint which is not aligned with the first one:
iterat=iterat->parent;
while (iterat!=NULL)
{
if ( (iterat->objectType==IK_JOINT_TYPE)&&((CIKJoint*)iterat)->revolute&&((CIKJoint*)iterat)->active )
{
C4X4Matrix secondJointCumul(iterat->getCumulativeTransformationPart1(true).getMatrix());
C3Vector secondJointZAxis(secondJointCumul.M.axis[2]);
if (fabs(firstJointZAxis*secondJointZAxis)<0.999999f) // Approx. 0.08 degrees
{
normalVect=(firstJointZAxis^secondJointZAxis).getNormalized();
if (firstJointZAxis*secondJointZAxis<0.0f)
secondJointZAxis=secondJointZAxis*-1.0f;
firstJointZAxis=((firstJointZAxis+secondJointZAxis)/2.0f).getNormalized();
break;
}
}
iterat=iterat->parent;
}
if (iterat!=NULL)
{
orDimensions=2;
// We search for a third revolute joint which is not orthogonal with normalVect:
iterat=iterat->parent;
while (iterat!=NULL)
{
if ( (iterat->objectType==IK_JOINT_TYPE)&&((CIKJoint*)iterat)->revolute&&((CIKJoint*)iterat)->active )
{
C4X4Matrix thirdJointCumul(iterat->getCumulativeTransformationPart1(true).getMatrix());
C3Vector thirdJointZAxis(thirdJointCumul.M.axis[2]);
if (fabs(normalVect*thirdJointZAxis)>0.0001f) // Approx. 0.005 degrees
{
orDimensions=3;
break;
}
}
iterat=iterat->parent;
}
}
}
if ( (orDimensions==1)||(orDimensions==2) )
{
// We align the tip dummy's z axis with the joint axis
// (and do the same transformation to targetCumulativeMatrix)
C4Vector rot(C4X4Matrix(firstJointZAxis).M.getQuaternion());
C4Vector tipParentInverse(tip->getParentCumulativeTransformation(true).Q.getInverse());
C4Vector tipNewLocal(tipParentInverse*rot);
C4Vector postTr(tip->getLocalTransformation(true).Q.getInverse()*tipNewLocal);
tip->transformation.Q=tipNewLocal;
C7Vector postTr2;
postTr2.setIdentity();
postTr2.Q=postTr;
tip->targetCumulativeTransformation=tip->targetCumulativeTransformation*postTr2;
}
Ja=getJacobian(tip,oldMatr,rowJoints,jointNbToExclude);
C3Vector posV;
for (int i=0;i<Ja->cols;i++)
{
// 1. Position space:
C3Vector vc((*Ja)(0,i),(*Ja)(1,i),(*Ja)(2,i));
float l=vc.getLength();
if (l>0.0001f) // 0.1 mm
{
vc=vc/l;
if (posDimensions==0)
{
posV=vc;
posDimensions++;
}
else if (posDimensions==1)
{
if (fabs(posV*vc)<0.999999f) // Approx. 0.08 degrees
{
posV=(posV^vc).getNormalized();
posDimensions++;
}
}
else if (posDimensions==2)
{
if (fabs(posV*vc)>0.0001f) // Approx. 0.005 degrees
posDimensions++;
}
}
}
if (posDimensions!=3)
{
if (posDimensions!=0)
{
C4X4Matrix aligned(posV);
tip->baseReorient=aligned.getInverse().getTransformation();
for (int i=0;i<Ja->cols;i++)
{
posV(0)=(*Ja)(0,i);
posV(1)=(*Ja)(1,i);
posV(2)=(*Ja)(2,i);
posV=tip->baseReorient.Q*posV; // baseReorient.X is 0 anyway...
(*Ja)(0,i)=posV(0);
(*Ja)(1,i)=posV(1);
(*Ja)(2,i)=posV(2);
}
oldMatr=tip->baseReorient.getMatrix()*oldMatr;
if (posDimensions==1)
tip->constraints+=IK_Z_CONSTRAINT;
else
tip->constraints+=(IK_X_CONSTRAINT+IK_Y_CONSTRAINT);
}
}
else
tip->constraints+=(IK_X_CONSTRAINT+IK_Y_CONSTRAINT+IK_Z_CONSTRAINT);
int doF=Ja->cols;
if (orDimensions==1)
{
if (doF-posDimensions>=1)
tip->constraints+=IK_GAMMA_CONSTRAINT;
}
else if (orDimensions==2)
{
if (doF-posDimensions>=1) // Is this correct?
tip->constraints+=IK_GAMMA_CONSTRAINT;
}
else if (orDimensions==3)
{
if (doF-posDimensions>=3)
tip->constraints+=(IK_ALPHA_BETA_CONSTRAINT|IK_GAMMA_CONSTRAINT);
}
theConstraints=tip->constraints;
}
else
Ja=getJacobian(tip,oldMatr,rowJoints,jointNbToExclude);
if (Ja==NULL)
{ // Error or not enough joints (effJoint=joints-jointNbToExclude) to get a Jacobian
delete Ja;
// We create dummy objects (so that we don't get an error when destroyed)
matrix=new CMatrix(0,0);
errorVector=new CMatrix(0,1);
chainIsValid=false;
return;
}
// oldMatr now contains the cumulative transf. matr. of tooltip relative to base
C4X4Matrix oldMatrInv(oldMatr.getInverse());
int doF=Ja->cols;
int equationNumber=0;
C4X4Matrix m;
C4X4Matrix targetCumulativeMatrix((tip->baseReorient*tip->targetCumulativeTransformation).getMatrix());
m.buildInterpolation(oldMatr,targetCumulativeMatrix,interpolFact);
// We prepare matrix and errorVector and their respective sizes:
if (theConstraints&IK_X_CONSTRAINT)
equationNumber++;
if (theConstraints&IK_Y_CONSTRAINT)
equationNumber++;
if (theConstraints&IK_Z_CONSTRAINT)
equationNumber++;
if (theConstraints&IK_ALPHA_BETA_CONSTRAINT)
equationNumber=equationNumber+2;
if (theConstraints&IK_GAMMA_CONSTRAINT)
equationNumber++;
matrix=new CMatrix(equationNumber,doF);
errorVector=new CMatrix(equationNumber,1);
// We set up the position/orientation errorVector and the matrix:
float positionWeight=1.0f;
float orientationWeight=1.0f;
int pos=0;
if (theConstraints&IK_X_CONSTRAINT)
{
for (int i=0;i<doF;i++)
(*matrix)(pos,i)=(*Ja)(0,i);
(*errorVector)(pos,0)=(m.X(0)-oldMatr.X(0))*positionWeight;
pos++;
}
if (theConstraints&IK_Y_CONSTRAINT)
{
for (int i=0;i<doF;i++)
(*matrix)(pos,i)=(*Ja)(1,i);
(*errorVector)(pos,0)=(m.X(1)-oldMatr.X(1))*positionWeight;
pos++;
}
if (theConstraints&IK_Z_CONSTRAINT)
{
for (int i=0;i<doF;i++)
(*matrix)(pos,i)=(*Ja)(2,i);
(*errorVector)(pos,0)=(m.X(2)-oldMatr.X(2))*positionWeight;
pos++;
}
if (theConstraints&IK_ALPHA_BETA_CONSTRAINT)
{
for (int i=0;i<doF;i++)
{
(*matrix)(pos,i)=(*Ja)(3,i);
(*matrix)(pos+1,i)=(*Ja)(4,i);
}
C4X4Matrix diff(oldMatrInv*m);
C3Vector euler(diff.M.getEulerAngles());
(*errorVector)(pos,0)=euler(0)*orientationWeight/IK_DIVISION_FACTOR;
(*errorVector)(pos+1,0)=euler(1)*orientationWeight/IK_DIVISION_FACTOR;
pos=pos+2;
}
if (theConstraints&IK_GAMMA_CONSTRAINT)
{
for (int i=0;i<doF;i++)
(*matrix)(pos,i)=(*Ja)(5,i);
C4X4Matrix diff(oldMatrInv*m);
C3Vector euler(diff.M.getEulerAngles());
(*errorVector)(pos,0)=euler(2)*orientationWeight/IK_DIVISION_FACTOR;
pos++;
}
delete Ja; // We delete the jacobian!
}
