bool InvTransBarrier2D::evaluate( const MsqMatrix<2,2>& A,
const MsqMatrix<2,2>& W,
double& result, MsqError& err )
{
double da = det(A);
double dw = det(W);
if (invalid_determinant(da) || invalid_determinant(dw))
return false;
MsqMatrix<2,2> Ap = transpose_adj(A);
Ap *= 1.0/da;
MsqMatrix<2,2> Wp = transpose_adj(W);
Wp *= 1.0/dw;
bool rval = metricPtr->evaluate( Ap, Wp, result, err );
return !MSQ_CHKERR(err) && rval;
}
bool TShapeSizeB1::evaluate_with_grad( const MsqMatrix<3,3>& T,
double& result,
MsqMatrix<3,3>& deriv_wrt_T,
MsqError& )
{
const double tau = det(T);
if (invalid_determinant(tau)) { // barrier
result = 0.0;
return false;
}
const MsqMatrix<3,3> adjt = transpose_adj(T);
const double nT = sqr_Frobenius(T);
const double nadj = sqr_Frobenius(adjt);
const double f = 1/(tau*tau);
result = nT + f*nadj - 6;
deriv_wrt_T = T;
deriv_wrt_T *= (1+f*nT);
deriv_wrt_T -= f * T * transpose(T) * T;
deriv_wrt_T -= f/tau * nadj * adjt;
deriv_wrt_T *= 2;
return true;
}
bool Target2DShapeOrientBarrier::evaluate_with_grad( const MsqMatrix<2,2>& A,
const MsqMatrix<2,2>& W,
double& result,
MsqMatrix<2,2>& deriv,
MsqError& err )
{
const MsqMatrix<2,2> Winv = inverse(W);
const MsqMatrix<2,2> T = A * Winv;
const double norm = Frobenius(T);
const double invroot = 1.0/MSQ_SQRT_TWO;
const double tau = det(T);
if (invalid_determinant(tau)) { // barrier
result = 0.0;
return false;
}
const double inv_tau = 1.0/tau;
const double invnorm = 1.0/norm;
result = 0.5*inv_tau*(norm - invroot * trace(T));
deriv = invnorm * T;
deriv(0,0) -= invroot;
deriv(1,1) -= invroot;
deriv *= 0.5;
deriv -= result * transpose_adj(T);
deriv *= inv_tau;
deriv = deriv * transpose(Winv);
return true;
}
bool TShapeSizeB1::evaluate_with_hess( const MsqMatrix<2,2>& T,
double& result,
MsqMatrix<2,2>& deriv_wrt_T,
MsqMatrix<2,2> second_wrt_T[3],
MsqError& err )
{
const double tau = det(T);
if (invalid_determinant(tau)) { // barrier
result = 0.0;
return false;
}
const MsqMatrix<2,2> adjt = transpose_adj(T);
const double nT = sqr_Frobenius(T);
const double f = 1/(tau*tau);
result = (1 + f) * nT - 4;
deriv_wrt_T = T;
deriv_wrt_T *= 2 + 2*f;
deriv_wrt_T -= 2 * f/tau * nT * adjt;
set_scaled_sum_outer_product( second_wrt_T, -4*f/tau, T, adjt );
pluseq_scaled_I( second_wrt_T, 2 + 2*f );
pluseq_scaled_outer_product( second_wrt_T, 6*nT*f*f, adjt );
pluseq_scaled_2nd_deriv_of_det( second_wrt_T, -2*nT*f/tau );
return true;
}
/** \f$ \frac{\partial^2 \mu}{\partial T^2}
= \frac{1}{\tau} I_4
- \frac{1}{\tau^2} \left( T \otimes \frac{\partial \tau}{\partial T}
+ \frac{\partial \tau}{\partial T} \otimes T \right)
+ \frac{|T|^2}{\tau^3} \left( \frac{\partial \tau}{\partial T} \otimes
\frac{\partial \tau}{\partial T} \right)
- \frac{|T|^2}{2 \tau^3} \frac{\partial^2 \tau}{\partial T^2} \f$
*/
bool TShapeB1::evaluate_with_hess( const MsqMatrix<2,2>& T,
double& result,
MsqMatrix<2,2>& deriv_wrt_T,
MsqMatrix<2,2> second_wrt_T[3],
MsqError& err )
{
const double d = det(T);
if (invalid_determinant(d)) { // barrier
MSQ_SETERR(err)( barrier_violated_msg, MsqError::BARRIER_VIOLATED );
return false;
}
double inv_d = 1.0/d;
double f1 = sqr_Frobenius(T) * inv_d;
result = 0.5 * f1;
const MsqMatrix<2,2> adjt = transpose_adj(T);
deriv_wrt_T = T;
deriv_wrt_T -= result * adjt;
deriv_wrt_T *= inv_d;
set_scaled_outer_product( second_wrt_T, f1 * inv_d * inv_d, adjt );
pluseq_scaled_sum_outer_product( second_wrt_T, -inv_d*inv_d, T, adjt );
pluseq_scaled_I( second_wrt_T, inv_d );
pluseq_scaled_2nd_deriv_of_det( second_wrt_T, -result * inv_d );
result -= 1.0;
return true;
}
bool TShapeB1::evaluate_with_hess( const MsqMatrix<3,3>& T,
double& result,
MsqMatrix<3,3>& deriv_wrt_T,
MsqMatrix<3,3> second_wrt_T[6],
MsqError& err )
{
double d = det(T);
if (invalid_determinant(d)) {
MSQ_SETERR(err)( barrier_violated_msg, MsqError::BARRIER_VIOLATED );
return false;
}
double id = 1.0/d;
double norm = Frobenius(T);
double den = 1.0/(3 * MSQ_SQRT_THREE * d);
double norm_cube = norm*norm*norm;
result = norm_cube * den - 1.0;
MsqMatrix<3,3> adjt = transpose_adj(T);
deriv_wrt_T = T;
deriv_wrt_T *= 3 * norm * den;
deriv_wrt_T -= norm_cube * den * id * transpose_adj(T);
set_scaled_outer_product( second_wrt_T, 3 * den / norm, T );
pluseq_scaled_I( second_wrt_T, 3 * norm * den );
pluseq_scaled_2nd_deriv_of_det( second_wrt_T, -den * norm_cube * id, T );
pluseq_scaled_outer_product( second_wrt_T, 2 * den * norm_cube * id * id , adjt );
pluseq_scaled_sum_outer_product( second_wrt_T, -3 * norm * den * id, T, adjt );
return true;
}
bool InverseMeanRatio2D::evaluate_with_grad( const MsqMatrix<2,2>& A,
const MsqMatrix<2,2>& W,
double& result,
MsqMatrix<2,2>& deriv_wrt_A,
MsqError& err )
{
const MsqMatrix<2,2> Winv = inverse(W);
const MsqMatrix<2,2> T = A * Winv;
const double d = det( T );
if (invalid_determinant(d)) {
result = 0.0;
deriv_wrt_A = MsqMatrix<2,2>(0.0);
return false;
}
else {
result = sqr_Frobenius(T) / (2 * d);
deriv_wrt_A = transpose_adj(T);
deriv_wrt_A *= -result;
deriv_wrt_A += T;
deriv_wrt_A *= 1.0/d;
deriv_wrt_A = deriv_wrt_A * transpose(Winv);
result -= 1.0;
return true;
}
}
/** \f$ \frac{\partial^2 \mu}{\partial T^2}
= \frac{1}{\tau} I_4
- \frac{1}{\tau^2} \left( T \otimes \frac{\partial \tau}{\partial T}
+ \frac{\partial \tau}{\partial T} \otimes T \right)
+ \frac{|T|^2}{\tau^3} \left( \frac{\partial \tau}{\partial T} \otimes
\frac{\partial \tau}{\partial T} \right)
- \frac{|T|^2}{2 \tau^3} \frac{\partial^2 \tau}{\partial T^2} \f$
*/
bool Target2DShapeBarrier::evaluate_with_hess( const MsqMatrix<2,2>& A,
const MsqMatrix<2,2>& W,
double& result,
MsqMatrix<2,2>& deriv_wrt_A,
MsqMatrix<2,2> second_wrt_A[3],
MsqError& err )
{
const MsqMatrix<2,2> Winv = inverse(W);
const MsqMatrix<2,2> T = A * Winv;
const double d = det(T);
if (invalid_determinant(d)) { // barrier
result = 0.0;
return false;
}
double inv_d = 1.0/d;
double f1 = sqr_Frobenius(T) * inv_d;
result = 0.5 * f1;
const MsqMatrix<2,2> adjt = transpose_adj(T);
deriv_wrt_A = T;
deriv_wrt_A -= result * adjt;
deriv_wrt_A *= inv_d;
deriv_wrt_A = deriv_wrt_A * transpose(Winv);
set_scaled_outer_product( second_wrt_A, f1 * inv_d * inv_d, adjt );
pluseq_scaled_sum_outer_product( second_wrt_A, -inv_d*inv_d, T, adjt );
pluseq_scaled_I( second_wrt_A, inv_d );
pluseq_scaled_2nd_deriv_of_det( second_wrt_A, -result * inv_d );
second_deriv_wrt_product_factor( second_wrt_A, Winv );
result -= 1.0;
return true;
}
bool TShape3DB2::evaluate_with_hess( const MsqMatrix<3,3>& T,
double& result,
MsqMatrix<3,3>& wrt_T,
MsqMatrix<3,3> second[6],
MsqError& err )
{
double f = sqr_Frobenius(T);
double g = sqr_Frobenius(adj(T));
double d = det(T);
if (invalid_determinant(d)) {
MSQ_SETERR(err)( barrier_violated_msg, MsqError::BARRIER_VIOLATED );
return false;
}
const double den = 1.0/(9*d*d);
result = f*g*den- 1;
MsqMatrix<3,3> dg = 2 * (f * T - T * transpose(T) * T);
MsqMatrix<3,3> df = 2 * T;
MsqMatrix<3,3> dtau = transpose_adj(T);
wrt_T = g*df + f*dg - 2*f*g/d * transpose_adj(T);
wrt_T *= den;
set_scaled_2nd_deriv_norm_sqr_adj( second, den*f, T );
pluseq_scaled_I( second, 2*den*g );
pluseq_scaled_sum_outer_product( second, den, dg, df );
pluseq_scaled_sum_outer_product( second, -2*den*g/d, df, dtau );
pluseq_scaled_sum_outer_product( second, -2*den*f/d, dg, dtau );
pluseq_scaled_outer_product( second, 6*den*f*g/(d*d), dtau );
pluseq_scaled_2nd_deriv_of_det( second, -2*den*f*g/d, T );
return true;
}
bool TShapeSize3DB2::evaluate_with_grad( const MsqMatrix<3,3>& T,
double& result,
MsqMatrix<3,3>& deriv_wrt_T,
MsqError& err )
{
const double tau = det(T);
if (invalid_determinant(tau)) { // barrier
result = 0.0;
return false;
}
const double f = sqr_Frobenius(T);
const double g = sqr_Frobenius(adj(T));
result = (f + g)/(6 * tau);
deriv_wrt_T = -transpose(T) * T;
deriv_wrt_T(0,0) += 1+f;
deriv_wrt_T(1,1) += 1+f;
deriv_wrt_T(2,2) += 1+f;
deriv_wrt_T = T * deriv_wrt_T;
deriv_wrt_T -= 3*result * transpose_adj(T);
deriv_wrt_T *= 1.0/(3*tau);
result -= 1.0;
return true;
}
bool TShapeSizeB3::evaluate_with_hess( const MsqMatrix<2,2>& T,
double& result,
MsqMatrix<2,2>& deriv_wrt_T,
MsqMatrix<2,2> second_wrt_T[3],
MsqError& err )
{
const double tau = det(T);
if (invalid_determinant(tau)) { // barrier
MSQ_SETERR(err)( barrier_violated_msg, MsqError::BARRIER_VIOLATED );
return false;
}
result = sqr_Frobenius(T) - 2.0 * std::log(tau) - 2;
const MsqMatrix<2,2> adjt = transpose_adj(T);
const double it = 1/tau;
deriv_wrt_T = T;
deriv_wrt_T -= it * adjt;
deriv_wrt_T *= 2;
set_scaled_outer_product( second_wrt_T, 2*it*it, adjt );
pluseq_scaled_2nd_deriv_of_det( second_wrt_T, -2*it );
pluseq_scaled_I( second_wrt_T, 2.0 );
return true;
}
bool Target3DShapeSizeBarrierAlt1::evaluate_with_grad( const MsqMatrix<3,3>& A,
const MsqMatrix<3,3>& W,
double& result,
MsqMatrix<3,3>& deriv_wrt_A,
MsqError& err )
{
const MsqMatrix<3,3> Winv = inverse(W);
const MsqMatrix<3,3> T = A * Winv;
const double tau = det(T);
if (invalid_determinant(tau)) { // barrier
result = 0.0;
return false;
}
const double f = sqr_Frobenius(T);
const double g = sqr_Frobenius(adj(T));
result = (f + g)/(6 * tau);
deriv_wrt_A = -transpose(T) * T;
deriv_wrt_A(0,0) += 1+f;
deriv_wrt_A(1,1) += 1+f;
deriv_wrt_A(2,2) += 1+f;
deriv_wrt_A = T * deriv_wrt_A;
deriv_wrt_A -= 3*result * transpose_adj(T);
deriv_wrt_A *= 1.0/(3*tau);
deriv_wrt_A = deriv_wrt_A * transpose(Winv);
result -= 1.0;
return true;
}
bool TShapeSizeB1::evaluate_with_hess( const MsqMatrix<3,3>& T,
double& result,
MsqMatrix<3,3>& deriv_wrt_T,
MsqMatrix<3,3> second_wrt_T[6],
MsqError& err )
{
const double tau = det(T);
if (invalid_determinant(tau)) { // barrier
result = 0.0;
return false;
}
const MsqMatrix<3,3> adjt = transpose_adj(T);
const double nT = sqr_Frobenius(T);
const double nadj = sqr_Frobenius(adjt);
const double f = 1/(tau*tau);
result = nT + f*nadj - 6;
//! \f$ \frac{\partial}{\partial T} |adj T|^2 \f$
const MsqMatrix<3,3> dNadj_dT = 2 * (nT * T - T * transpose(T) * T);
deriv_wrt_T = T;
deriv_wrt_T -= f/tau * nadj * adjt;
deriv_wrt_T *= 2;
deriv_wrt_T += f * dNadj_dT;
// calculate negative of 2nd wrt T of (|adj T|^2 / tau^2) (sec 3.2.2)
set_scaled_2nd_deriv_norm_sqr_adj( second_wrt_T, f, T );
pluseq_scaled_2nd_deriv_of_det( second_wrt_T, -2*f*f*nadj*tau, T );
pluseq_scaled_outer_product( second_wrt_T, 6*f*f*nadj, adjt );
pluseq_scaled_sum_outer_product( second_wrt_T, -2*f*f *tau, adjt, dNadj_dT );
// calculate 2nd wrt T of this metric
pluseq_scaled_I( second_wrt_T, 2.0 );
return true;
}
bool Target3DShapeOrientBarrierAlt1::evaluate_with_grad( const MsqMatrix<3,3>& A,
const MsqMatrix<3,3>& W,
double& result,
MsqMatrix<3,3>& deriv_wrt_A,
MsqError& err )
{
MsqMatrix<3,3> Winv = inverse(W);
MsqMatrix<3,3> T = A * Winv;
double tau = det(T);
if (invalid_determinant(tau)) {
result = 0.0;
return false;
}
const double b = 0.5/tau;
const double tr = trace(T);
const double f = MSQ_ONE_THIRD * fabs(tr);
result = sqr_Frobenius( T ) - f * tr;
deriv_wrt_A = T;
deriv_wrt_A(0,0) -= f;
deriv_wrt_A(1,1) -= f;
deriv_wrt_A(2,2) -= f;
deriv_wrt_A *= 2*tau;
deriv_wrt_A -= result * transpose_adj(T);
result *= b;
deriv_wrt_A *= b/tau;
deriv_wrt_A = deriv_wrt_A * transpose(Winv);
return true;
}
bool TShapeSize2DB2::evaluate_with_hess( const MsqMatrix<2,2>& T,
double& result,
MsqMatrix<2,2>& deriv_wrt_T,
MsqMatrix<2,2> second[3],
MsqError& err )
{
const double d = det(T);
if (invalid_determinant(d)) { // barrier
MSQ_SETERR(err)( barrier_violated_msg, MsqError::BARRIER_VIOLATED );
return false;
}
const double frob_sqr = sqr_Frobenius(T);
const double psi = sqrt( frob_sqr + 2.0*det(T) );
const double v = frob_sqr - 2.0 * psi + 2.0;
result = v / (2*d);
// deriv of V wrt T
MsqMatrix<2,2> adjt = transpose_adj(T);
MsqMatrix<2,2> v_wrt_T(T);
if (psi > 1e-50)
{
v_wrt_T *= (1.0 - 1.0/psi);
v_wrt_T -= 1.0/psi * adjt;
v_wrt_T *= 2;
}
else
{
std::cout << "Warning: Division by zero avoided in TShapeSize2DB2::evaluate_with_hess()" << std::endl;
}
// deriv of mu wrt T
deriv_wrt_T = v_wrt_T;
deriv_wrt_T *= 0.5/d;
deriv_wrt_T -= v / (2*d*d) * adjt;
// second of V wrt T
const double s = T(0,1) - T(1,0);
const double tr = trace(T);
const double f = -2.0/(psi*psi*psi);
second[0](0,0) = second[1](0,1) = second[2](1,1) = f*s*s;
second[0](0,1) = second[0](1,0) = second[1](1,1) = -f*s*tr;
second[1](0,0) = second[2](0,1) = second[2](1,0) = f*s*tr;
second[0](1,1) = second[2](0,0) = -(second[1](1,0) = -f*tr*tr);
pluseq_scaled_I( second, 2 );
// second of mu wrt T
const double x = 1.0/(2*d);
second[0] *= x;
second[1] *= x;
second[2] *= x;
pluseq_scaled_2nd_deriv_of_det( second, v/(-2*d*d) );
pluseq_scaled_outer_product( second, v/(d*d*d), adjt );
pluseq_scaled_sum_outer_product( second, -1/(2*d*d), v_wrt_T, adjt );
return true;
}
bool InvTransBarrier::evaluate( const MsqMatrix<2,2>& T,
double& result, MsqError& err )
{
double tau = det(T);
if (invalid_determinant(tau))
return false;
MsqMatrix<2,2> Tp = transpose_adj(T);
Tp *= 1.0/tau;
bool rval = metricPtr->evaluate( Tp, result, err );
return !MSQ_CHKERR(err) && rval;
}
bool InverseMeanRatio2D::evaluate_with_hess( const MsqMatrix<2,2>& A,
const MsqMatrix<2,2>& W,
double& result,
MsqMatrix<2,2>& dA,
MsqMatrix<2,2> d2A[3],
MsqError& err )
{
const MsqMatrix<2,2> Winv = inverse(W);
const MsqMatrix<2,2> T = A * Winv;
const double d = det( T );
if (invalid_determinant(d)) {
result = 0.0;
dA = d2A[0] = d2A[1] = d2A[2] = MsqMatrix<2,2>(0.0);
return false;
}
else {
const double inv_det = 1.0/d;
result = sqr_Frobenius(T) * 0.5 * inv_det;
const MsqMatrix<2,2> AT = transpose_adj(T);
dA = AT;
dA *= -result;
dA += T;
dA *= inv_det;
dA = dA * transpose(Winv);
const double p3 = -result * inv_det;
const double p1 = -2.0 * p3 * inv_det;
const double p2 = -inv_det * inv_det;
const MsqMatrix<2,2> AT_T_op_00 = outer( AT.row(0), T.row(0));
const MsqMatrix<2,2> AT_T_op_11 = outer( AT.row(1), T.row(1));
d2A[0] = p1 * outer( AT.row(0), AT.row(0))
+ p2 * (AT_T_op_00 + transpose(AT_T_op_00));
d2A[1] = p1 * outer( AT.row(0), AT.row(1))
+ p2 * (outer( AT.row(0), T.row(1))
+ outer( T.row(0), AT.row(1) ));
d2A[2] = p1 * outer( AT.row(1), AT.row(1))
+ p2 * (AT_T_op_11 + transpose(AT_T_op_11));
d2A[0](0,0) += inv_det;
d2A[0](1,1) += inv_det;
d2A[1](0,1) += p3;
d2A[1](1,0) -= p3;
d2A[2](0,0) += inv_det;
d2A[2](1,1) += inv_det;
d2A[0] = Winv * d2A[0] * transpose(Winv);
d2A[1] = Winv * d2A[1] * transpose(Winv);
d2A[2] = Winv * d2A[2] * transpose(Winv);
result -= 1.0;
return true;
}
}
bool TShapeSizeB3::evaluate( const MsqMatrix<2,2>& T,
double& result,
MsqError& err )
{
const double tau = det(T);
if (invalid_determinant(tau)) { // barrier
MSQ_SETERR(err)( barrier_violated_msg, MsqError::BARRIER_VIOLATED );
return false;
}
result = sqr_Frobenius(T) - 2.0 * std::log(tau) - 2;
return true;
}
bool TShapeB1::evaluate( const MsqMatrix<2,2>& T,
double& result,
MsqError& err)
{
const double d = det(T);
if (invalid_determinant(d)) { // barrier
MSQ_SETERR(err)( barrier_violated_msg, MsqError::BARRIER_VIOLATED );
return false;
}
result = 0.5 * sqr_Frobenius(T) / d - 1;
return true;
}
bool Target2DShapeOrientBarrier::evaluate( const MsqMatrix<2,2>& A,
const MsqMatrix<2,2>& W,
double& result,
MsqError& )
{
MsqMatrix<2,2> T = A * inverse(W);
const double tau = det(T);
if (invalid_determinant(tau)) { // barrier
result = 0.0;
return false;
}
result = 0.5/tau * (Frobenius( T ) - trace(T)/MSQ_SQRT_TWO);
return true;
}
// \mu_3(T) = \frac{ |T|^2 |adj(T)|^2 } {9 \tau^2} - 1
bool TShape3DB2::evaluate( const MsqMatrix<3,3>& T,
double& result,
MsqError& err )
{
double f = sqr_Frobenius(T);
double g = sqr_Frobenius(adj(T));
double d = det(T);
if (invalid_determinant(d)) {
MSQ_SETERR(err)( barrier_violated_msg, MsqError::BARRIER_VIOLATED );
return false;
}
result = (f*g) / (9*d*d) - 1;
return true;
}
bool Target3DShapeOrientBarrierAlt1::evaluate_with_Hess( const MsqMatrix<3,3>& A,
const MsqMatrix<3,3>& W,
double& result,
MsqMatrix<3,3>& deriv_wrt_A,
MsqMatrix<3,3> second_wrt_A[6],
MsqError& err )
{
MsqMatrix<3,3> Winv = inverse(W);
MsqMatrix<3,3> T = A * Winv;
double tau = det(T);
if (invalid_determinant(tau)) {
result = 0.0;
return false;
}
const double b = 0.5/tau;
// calculate non-barrier value (ShapeOrientAlt1)
const double tr = trace(T);
const double f = MSQ_ONE_THIRD * fabs(tr);
result = sqr_Frobenius( T ) - f * tr;
// calculate non-barrier first derivatives
deriv_wrt_A = T;
deriv_wrt_A(0,0) -= f;
deriv_wrt_A(1,1) -= f;
deriv_wrt_A(2,2) -= f;
deriv_wrt_A *= 2;
// calculate barrier second derivs
const MsqMatrix<3,3> adjt = transpose_adj(T);
set_scaled_sum_outer_product( second_wrt_A, -b/tau, deriv_wrt_A, adjt );
pluseq_scaled_outer_product( second_wrt_A, result/(tau*tau*tau), adjt );
pluseq_scaled_2nd_deriv_of_det( second_wrt_A, -result * b / tau, T );
// calculate non-barrier barrier portion of second derivs
pluseq_scaled_I( second_wrt_A, 1/tau );
pluseq_scaled_outer_product_I_I( second_wrt_A, MSQ_ONE_THIRD/tau * (tr < 0 ? 1 : -1) );
// calculate barrier derivs from non-barrier
deriv_wrt_A *= tau;
deriv_wrt_A -= result * adjt;
deriv_wrt_A *= b/tau;
// barrier value from non-barrier
result *= b;
// convert from derivs wrt T to derivs wrt A
deriv_wrt_A = deriv_wrt_A * transpose(Winv);
second_deriv_wrt_product_factor( second_wrt_A, Winv );
return true;
}
bool TShapeSizeB3::evaluate( const MsqMatrix<3,3>& T,
double& result,
MsqError& err )
{
const double tau = det(T);
if (invalid_determinant(tau)) { // barrier
MSQ_SETERR(err)( barrier_violated_msg, MsqError::BARRIER_VIOLATED );
return false;
}
double n = Frobenius(T);
result = n*n*n - 3*MSQ_SQRT_THREE*( log(tau) + 1 );
return true;
}
bool TShapeSize2DB2::evaluate( const MsqMatrix<2,2>& T,
double& result,
MsqError& err )
{
const double two_det = 2.0 * det(T);
if (invalid_determinant(two_det)) { // barrier
MSQ_SETERR(err)( barrier_violated_msg, MsqError::BARRIER_VIOLATED );
return false;
}
const double frob_sqr = sqr_Frobenius(T);
result = (frob_sqr - 2.0 * sqrt( frob_sqr + two_det ) + 2.0)/two_det;
return true;
}
bool TShapeSize3DB4::evaluate( const MsqMatrix<3,3>& T,
double& result,
MsqError& err )
{
const double tau = det(T);
if (invalid_determinant(tau)) { // barrier
MSQ_SETERR(err)( barrier_violated_msg, MsqError::BARRIER_VIOLATED );
return false;
}
const double norm = Frobenius(T);
result = norm*norm*norm / (3*MSQ_SQRT_THREE*tau) - 1
+ mGamma * (tau + 1/tau - 2);
return true;
}
bool TShapeSizeB1::evaluate( const MsqMatrix<2,2>& T,
double& result,
MsqError& )
{
const double tau = det(T);
if (invalid_determinant(tau)) { // barrier
result = 0.0;
return false;
}
const double nT = sqr_Frobenius(T);
const double f = 1/(tau*tau);
result = (1 + f) * nT - 4;
return true;
}
bool Target2DShapeBarrier::evaluate( const MsqMatrix<2,2>& A,
const MsqMatrix<2,2>& W,
double& result,
MsqError& )
{
const MsqMatrix<2,2> T = A * inverse(W);
const double d = det(T);
if (invalid_determinant(d)) { // barrier
result = 0.0;
return false;
}
result = 0.5 * sqr_Frobenius(T) / d - 1;
return true;
}
bool TShapeSize3DB2::evaluate( const MsqMatrix<3,3>& T,
double& result,
MsqError& )
{
const double tau = det(T);
if (invalid_determinant(tau)) { // barrier
result = 0.0;
return false;
}
const double f = sqr_Frobenius(T);
const double g = sqr_Frobenius(adj(T));
result = (f + g)/(6 * tau) - 1;
return true;
}
bool TShapeB1::evaluate( const MsqMatrix<3,3>& T,
double& result,
MsqError& err)
{
double f = Frobenius(T);
double d = det(T);
double den = 3 * MSQ_SQRT_THREE * d;
if (invalid_determinant(d)) {
MSQ_SETERR(err)( barrier_violated_msg, MsqError::BARRIER_VIOLATED );
return false;
}
result = (f*f*f)/den - 1.0;
return true;
}
bool Target3DShapeOrientBarrierAlt1::evaluate( const MsqMatrix<3,3>& A,
const MsqMatrix<3,3>& W,
double& result,
MsqError& )
{
const MsqMatrix<3,3> T = A * inverse(W);
double tau = det(T);
if (invalid_determinant(tau)) {
result = 0.0;
return false;
}
const double tr = trace(T);
result = (0.5/tau) * (sqr_Frobenius( T ) - MSQ_ONE_THIRD * tr * fabs(tr));
return true;
}
