From d18526907a179b4216c717bea1f37db067cf6c3d Mon Sep 17 00:00:00 2001
From: Oliver Sander <sander@igpm.rwth-aachen.de>
Date: Tue, 21 Apr 2009 10:06:39 +0000
Subject: [PATCH] temporary: use the fd approximation of the gradient, and add
some debugging code
[[Imported from SVN: r4069]]
---
src/harmonicenergystiffness.hh | 23 +++++++++++++++++++++--
1 file changed, 21 insertions(+), 2 deletions(-)
diff --git a/src/harmonicenergystiffness.hh b/src/harmonicenergystiffness.hh
index 42ea57fd..c0306a84 100644
--- a/src/harmonicenergystiffness.hh
+++ b/src/harmonicenergystiffness.hh
@@ -69,7 +69,7 @@ energy(const Entity& element,
double weight = quad[pt].weight() * integrationElement;
// The derivative of the local function defined on the reference element
- Dune::FieldMatrix<double, TargetSpace::EmbeddedTangentVector::size, gridDim> referenceDerivative = localGeodesicFEFunction.evaluateDerivative(quadPos);
+ Dune::FieldMatrix<double, TargetSpace::EmbeddedTangentVector::size, gridDim> referenceDerivative = localGeodesicFEFunction.evaluateDerivativeFD(quadPos);
// The derivative of the function defined on the actual element
Dune::FieldMatrix<double, TargetSpace::EmbeddedTangentVector::size, gridDim> derivative(0);
@@ -77,6 +77,25 @@ energy(const Entity& element,
for (int comp=0; comp<4; comp++)
jacobianInverseTransposed.umv(referenceDerivative[comp], derivative[comp]);
+ TargetSpace value = localGeodesicFEFunction.evaluate(quadPos);
+
+ for (int i=0; i<gridDim; i++) {
+ double dotproduct = 0;
+ for (int j=0; j<4; j++)
+ dotproduct += value[j]*derivative[j][i];
+ assert(std::fabs(dotproduct) < 1e-6);
+ }
+
+#if 0
+ double derivativenorm0 = 0;
+ double derivativenorm1 = 0;
+ for (int i=0; i<4; i++) {
+ derivativenorm0 += derivative[i][0]*derivative[i][0];
+ derivativenorm1 += derivative[i][1]*derivative[i][1];
+ }
+ std::cout << "Derivative norm: " << derivativenorm0 << ", " << derivativenorm1 << std::endl;
+#endif
+
for (int comp=0; comp<4; comp++) {
for (int dir=0; dir<gridDim; dir++)
@@ -85,7 +104,7 @@ energy(const Entity& element,
}
}
-
+
return energy;
}
--
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