-change the Z of the inputs to the mesher to be 0.0. Bug 15246 expose…

…s a bug that is caused by variable z values. These are not needed by the mesher.

xmsmesher/meshing/MePolyMesher.cpp

@@ -153,7 +153,17 @@ class MePolyMesherImpl : public MePolyMesher
 };         // class MePolyMesherImpl
 
 //----- Internal functions -----------------------------------------------------
+namespace {
+//------------------------------------------------------------------------------
+/// \brief Sets the Z to 0.0 in a vector of Pt3d
+//------------------------------------------------------------------------------
+static void iSetPt3dZtoZero(VecPt3d& a_vec)
+{
+  for (auto& pt : a_vec)
+    pt.z = 0.0;
+} // i_Set_Pt3d_Z_to_Zero
 
+}
 //----- Class / Function definitions -------------------------------------------
 
 //------------------------------------------------------------------------------
@@ -249,16 +259,25 @@ bool MePolyMesherImpl::MeshIt(const MeMultiPolyMesherIo& a_input,
 
   m_polyId = polyInput.m_polyId;
   m_outPoly = polyInput.m_outPoly;
+  iSetPt3dZtoZero(m_outPoly);
   m_seedPts = polyInput.m_seedPoints;
+  iSetPt3dZtoZero(m_seedPts);
   m_relaxSeedPoints = polyInput.m_relaxSeedPoints;
   ComputeTolerance();
 
   // holes inside the outer polygons
   m_inPolys = polyInput.m_insidePolys;
+  for (auto& pts : m_inPolys)
+  {
+    iSetPt3dZtoZero(pts);
+  }
   // bias term
   m_bias = polyInput.m_bias;
   // refine pts
-  m_refineToPolys->SetRefinePoints(a_input.m_refPts, m_xyTol);
+  std::vector<MeRefinePoint> refPts = a_input.m_refPts;
+  for (auto& rp : refPts)
+    rp.m_pt.z = 0.0;
+  m_refineToPolys->SetRefinePoints(refPts, m_xyTol);
   m_refineToPolys->RefPtsAsPolys(polyInput.m_polyId, m_outPoly, m_inPolys, m_refPtPolys,
                                  m_refMeshPts, m_refPtsTooClose);
   // size function
@@ -312,9 +331,12 @@ bool MePolyMesherImpl::MeshIt(const VecPt3d& a_outPoly,
                               VecInt& a_triangles)
 {
   m_outPoly = a_outPoly;
+  iSetPt3dZtoZero(m_outPoly);
   ComputeTolerance();
   SortPoly(m_outPoly);
   m_inPolys = a_inPolys;
+  for (auto& pts : m_inPolys)
+    iSetPt3dZtoZero(pts);
   m_bias = a_bias;
   VecInt cells;
   return MeshFromInputs(a_points, a_triangles, cells);