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ENH: use face::area() method for surfaceMeshInfo

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This commit is contained in:
Mark Olesen
2011-04-07 09:29:05 +02:00
parent cfc1f315d8
commit 9153534a9d
1 changed files with 1 additions and 54 deletions
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55
applications/utilities/surface/surfaceMeshInfo/surfaceMeshInfo.C
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@ -64,59 +64,6 @@ Note
using namespace Foam;
//
// duplicates code from primitiveMeshFaceCentresAndAreas.C
// should be refactored
//
Foam::vector faceArea(const face& fs, const pointField& p)
{
const labelList& f = fs;
label nPoints = f.size();
point fCentre;
vector fArea;
// If the face is a triangle, do a direct calculation for efficiency
// and to avoid round-off error-related problems
if (nPoints == 3)
{
fCentre = (1.0/3.0)*(p[f[0]] + p[f[1]] + p[f[2]]);
fArea = 0.5*((p[f[1]] - p[f[0]])^(p[f[2]] - p[f[0]]));
}
else
{
fCentre = p[f[0]];
for (label pi = 1; pi < nPoints; ++pi)
{
fCentre += p[f[pi]];
}
fCentre /= nPoints;
vector sumN = vector::zero;
scalar sumA = 0.0;
vector sumAc = vector::zero;
for (label pi = 0; pi < nPoints; ++pi)
{
const point& nextPoint = p[f[(pi + 1) % nPoints]];
const vector c = p[f[pi]] + nextPoint + fCentre;
const vector n = (nextPoint - p[f[pi]])^(fCentre - p[f[pi]]);
const scalar a = mag(n);
sumN += n;
sumA += a;
sumAc += a*c;
}
fArea = 0.5*sumN;
}
return fArea;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
// Main program:
@ -200,7 +147,7 @@ int main(int argc, char *argv[])
forAll(surf, faceI)
{
scalar fArea = mag(faceArea(surf[faceI], surf.points()));
const scalar fArea(Foam::mag(surf[faceI].area(surf.points())));
areaTotal += fArea;
if (writeAreas)