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0025378: Building of triangulation for distored surfaces can take very long using BRepMesh_IncrementalMesh

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New parameter MinSize has been introduced to BRepMesh and GCPnts_TangentialDeflection;

Check length of remaining part of curve for min size parameter instead of distance between two points to avoid large gaps in case highly distorted BSpline surfaces;

Produce fine mesh for sphere and fix other surface;

Test cases for issue CR25378

Correction of test cases for issue CR25378
This commit is contained in:
oan
2014-12-11 17:15:42 +03:00
committed by bugmaster
parent 949df2b64b
commit 74da0216d7
31 changed files with 788 additions and 243 deletions
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22
src/MeshTest/MeshTest.cxx
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@@ -127,9 +127,13 @@ static Standard_Integer incrementalmesh(Draw_Interpretor& di, Standard_Integer n
Builds triangular mesh for the shape\n\
usage: incmesh Shape LinearDeflection [options]\n\
options:\n\
-a val angular deflection in deg (default ~28.64 deg = 0.5 rad)\n\
-a val angular deflection in deg\n\
(default ~28.64 deg = 0.5 rad)\n\n\
-min minimum size parameter limiting size of triangle's\n\
edges to prevent sinking into amplification in case\n\
of distorted curves and surfaces\n\n\
-relative notifies that relative deflection is used\n\
(switched off by default)\n\
(switched off by default)\n\n\
-int_vert_off disables insertion of internal vertices into mesh\n\
(enabled by default)\n\
-parallel enables parallel execution (switched off by default)\n";
@@ -145,6 +149,7 @@ options:\n\
Standard_Real aLinDeflection = Max(Draw::Atof(argv[2]), Precision::Confusion());
Standard_Real aAngDeflection = 0.5;
Standard_Real aMinSize = Precision::Confusion();
Standard_Boolean isRelative = Standard_False;
Standard_Boolean isInParallel = Standard_False;
Standard_Boolean isIntVertices = Standard_True;
@@ -170,6 +175,8 @@ options:\n\
Standard_Real aVal = Draw::Atof(argv[i++]);
if (aOpt == "-a")
aAngDeflection = aVal * M_PI / 180.;
else if (aOpt == "-min")
aMinSize = aVal;
else
--i;
}
@@ -180,11 +187,12 @@ options:\n\
<< (isInParallel ? "ON" : "OFF") << "\n";
BRepMesh_IncrementalMesh aMesher;
aMesher.SetShape (aShape);
aMesher.SetDeflection (aLinDeflection);
aMesher.SetRelative (isRelative);
aMesher.SetAngle (aAngDeflection);
aMesher.SetParallel (isInParallel);
aMesher.SetShape (aShape);
aMesher.SetDeflection(aLinDeflection);
aMesher.SetRelative (isRelative);
aMesher.SetAngle (aAngDeflection);
aMesher.SetParallel (isInParallel);
aMesher.SetMinSize (aMinSize);
aMesher.SetInternalVerticesMode(isIntVertices);
aMesher.Perform();