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Using all of the surface alignment directions to perform near surface alignment.

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This commit is contained in:
Graham 2009-02-03 19:54:40 +00:00
parent 888a341e2b
commit 3b8c849b09
1 changed files with 177 additions and 39 deletions
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156
applications/utilities/mesh/generation/CV3DMesher/CV3D.C
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@ -194,6 +194,11 @@ void Foam::CV3D::setVertexAlignmentDirections()
// Tertiary alignment
vector nt = ns ^ np;
// this normalisation is not necessary if np and ns are
// perpendicular unit vectors.
nt /= mag(nt);
alignmentDirections.setSize(3);
alignmentDirections[0] = np;
@ -676,7 +681,115 @@ void Foam::CV3D::relaxPoints(const scalar relaxation)
|| vB->alignmentDirections().size() > 0
)
{
vector alignmentDir;
Field<vector> alignmentDirs;
if
(
vA->alignmentDirections().size() == 3
|| vB->alignmentDirections().size() == 3
)
{
alignmentDirs.setSize(3);
if (vB->alignmentDirections().size() == 0)
{
alignmentDirs = vA->alignmentDirections();
}
else if (vA->alignmentDirections().size() == 0)
{
alignmentDirs = vB->alignmentDirections();
}
else if
(
vA->alignmentDirections().size() == 3
&& vB->alignmentDirections().size() == 3
)
{
forAll(vA->alignmentDirections(), aA)
{
const vector& a(vA->alignmentDirections()[aA]);
scalar maxDotProduct = 0.0;
forAll(vB->alignmentDirections(), aB)
{
const vector& b(vB->alignmentDirections()[aB]);
if (mag(a & b) > maxDotProduct)
{
maxDotProduct = mag(a & b);
alignmentDirs[aA] = a + sign(a & b)*b;
alignmentDirs[aA] /= mag(alignmentDirs[aA]);
}
}
}
}
else
{
// One of the vertices has 3 alignments and the other
// has 1
vector otherAlignment;
if (vA->alignmentDirections().size() == 3)
{
alignmentDirs = vA->alignmentDirections();
otherAlignment = vB->alignmentDirections()[0];
}
else
{
alignmentDirs = vB->alignmentDirections();
otherAlignment = vA->alignmentDirections()[0];
}
label matchingDirection = -1;
scalar maxDotProduct = 0.0;
forAll(alignmentDirs, aD)
{
const vector& a(alignmentDirs[aD]);
if (mag(a & otherAlignment) > maxDotProduct)
{
maxDotProduct = mag(a & otherAlignment);
matchingDirection = aD;
}
}
vector& matchingAlignment =
alignmentDirs[matchingDirection];
matchingAlignment = matchingAlignment
+ sign(matchingAlignment & otherAlignment)
*otherAlignment;
matchingAlignment /= mag(matchingAlignment);
}
// vector midpoint = 0.5*(dVA + dVB);
// Info<< "midpoint " << midpoint
// << nl << alignmentDirs
// << nl << "v " << midpoint + alignmentDirs[0]
// << nl << "v " << midpoint + alignmentDirs[1]
// << nl << "v " << midpoint + alignmentDirs[2]
// << nl << "v " << midpoint
// << nl << "f 4 1"
// << nl << "f 4 2"
// << nl << "f 4 3"
// << nl << endl;
}
else
{
alignmentDirs.setSize(1);
vector& alignmentDir = alignmentDirs[0];
if
(
@ -698,29 +811,53 @@ void Foam::CV3D::relaxPoints(const scalar relaxation)
{
// Both vertices have an alignment
alignmentDir = vA->alignmentDirections()[0]
- vB->alignmentDirections()[0];
const vector& a(vA->alignmentDirections()[0]);
if (mag(alignmentDir) < SMALL)
const vector& b(vB->alignmentDirections()[0]);
Info<< mag(a & b) << endl;
if (mag(a & b) < 1 - SMALL)
{
alignmentDir = vA->alignmentDirections()[0];
alignmentDirs.setSize(3);
alignmentDirs[0] = a + b;
alignmentDirs[1] = a - b;
alignmentDirs[2] =
alignmentDirs[0] ^ alignmentDirs[1];
alignmentDirs /= mag(alignmentDirs);
}
else
{
alignmentDir = a + sign(a & b)*b;
alignmentDir /= mag(alignmentDir);
}
}
}
// alignmentDirs found, now apply them
vector rAB = dVA - dVB;
scalar rABMag = mag(rAB);
forAll(alignmentDirs, aD)
{
vector& alignmentDir = alignmentDirs[aD];
if ((rAB & alignmentDir) < 0)
{
// swap the direction of the alignment so that has the same
// sense as rAB
// swap the direction of the alignment so that has the
// same sense as rAB
alignmentDir *= -1;
}
scalar cosAcceptanceAngle = 0.743;
// scalar cosAcceptanceAngle = 0.743;
scalar cosAcceptanceAngle = 0.67;
if (((rAB/rABMag) & alignmentDir) > cosAcceptanceAngle)
{
@ -744,6 +881,7 @@ void Foam::CV3D::relaxPoints(const scalar relaxation)
}
}
}
}
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@ -751,7 +889,7 @@ void Foam::CV3D::relaxPoints(const scalar relaxation)
scalar totalDist = sum(mag(displacementAccumulator));
Info<< "Total displacement = " << totalDisp
<< " total distance = " << totalDist << endl;
<< nl << "Total distance = " << totalDist << endl;
displacementAccumulator *= relaxation;