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PAL9163. Fix GetFaceNormal() for badly shaped quadrangles

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eap 2005-06-14 10:09:53 +00:00
parent 030274bd88
commit 55a05c00fe
1 changed files with 11 additions and 1 deletions
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12
src/SMDS/SMDS_VolumeTool.cxx
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@ -471,6 +471,15 @@ bool SMDS_VolumeTool::GetFaceNormal (int faceIndex, double & X, double & Y, doub
XYZ aVec13( p3 - p1 );
XYZ cross = aVec12.Crossed( aVec13 );
if ( myFaceNbNodes[ faceIndex ] == 4 ) {
XYZ p4 ( myFaceNodes[3] );
XYZ aVec14( p4 - p1 );
XYZ cross2 = aVec13.Crossed( aVec14 );
cross.x += cross2.x;
cross.y += cross2.y;
cross.z += cross2.z;
}
double size = cross.Magnitude();
if ( size <= DBL_MIN )
return false;
@ -802,8 +811,9 @@ bool SMDS_VolumeTool::setFace( int faceIndex )
// set face nodes
int iNode, nbNode = myFaceNbNodes[ faceIndex ];
for ( iNode = 0; iNode <= nbNode; iNode++ )
for ( iNode = 0; iNode < nbNode; iNode++ )
myFaceNodes[ iNode ] = myVolumeNodes[ myFaceNodeIndices[ iNode ]];
myFaceNodes[ iNode ] = myFaceNodes[ 0 ];
myCurFace = faceIndex;