From fd025ce2a6d4467f79baecac8c7a17f996613d6a Mon Sep 17 00:00:00 2001 From: eap Date: Thu, 21 Oct 2010 08:57:14 +0000 Subject: [PATCH] 0020834]: EDF 1362 SMESH : Add a 2D quadrangle mesher of reduced type Make Mesh_Quadrangle always create QuadranglePreference hyp --- src/SMESH_SWIG/smeshDC.py | 107 ++++++++++++++++++++++++++++---------- 1 file changed, 79 insertions(+), 28 deletions(-) diff --git a/src/SMESH_SWIG/smeshDC.py b/src/SMESH_SWIG/smeshDC.py index 4d53fa8d7..54f89813f 100644 --- a/src/SMESH_SWIG/smeshDC.py +++ b/src/SMESH_SWIG/smeshDC.py @@ -50,6 +50,7 @@ ## @defgroup l3_hypos_ghs3dh GHS3D Parameters hypothesis ## @defgroup l3_hypos_blsurf BLSURF Parameters hypothesis ## @defgroup l3_hypos_hexotic Hexotic Parameters hypothesis +## @defgroup l3_hypos_quad Quadrangle Parameters hypothesis ## @defgroup l3_hypos_additi Additional Hypotheses ## @} @@ -201,6 +202,8 @@ PrecisionConfusion = 1e-07 # Methods of splitting a hexahedron into tetrahedra Hex_5Tet, Hex_6Tet, Hex_24Tet = 1, 2, 3 +# import items of enum QuadType +for e in StdMeshers.QuadType._items: exec('%s = StdMeshers.%s'%(e,e)) ## Converts an angle from degrees to radians def DegreesToRadians(AngleInDegrees): @@ -4693,48 +4696,96 @@ class Mesh_Triangle(Mesh_Algorithm): # @ingroup l3_algos_basic class Mesh_Quadrangle(Mesh_Algorithm): + params=0 + ## Private constructor. def __init__(self, mesh, geom=0): Mesh_Algorithm.__init__(self) self.Create(mesh, geom, "Quadrangle_2D") + return - ## Defines "QuadranglePreference" hypothesis, forcing construction - # of quadrangles if the number of nodes on the opposite edges is not the same - # while the total number of nodes on edges is even - # - # @ingroup l3_hypos_additi - def QuadranglePreference(self): - hyp = self.Hypothesis("QuadranglePreference", UseExisting=1, - CompareMethod=self.CompareEqualHyp) - return hyp + ## Defines "QuadrangleParameters" hypothesis + # @param quadType defines the algorithm of transition between differently descretized + # sides of a geometrical face: + # - QUAD_STANDARD - both triangles and quadrangles are possible in the transition + # area along the finer meshed sides. + # - QUAD_TRIANGLE_PREF - only triangles are built in the transition area along the + # finer meshed sides. + # - QUAD_QUADRANGLE_PREF - only quadrangles are built in the transition area along + # the finer meshed sides, iff the total quantity of segments on + # all four sides of the face is even (divisible by 2). + # - QUAD_QUADRANGLE_PREF_REVERSED - same as QUAD_QUADRANGLE_PREF but the transition + # area is located along the coarser meshed sides. + # - QUAD_REDUCED - only quadrangles are built and the transition between the sides + # is made gradually, layer by layer. This type has a limitation on + # the number of segments: one pair of opposite sides must have the + # same number of segments, the other pair must have an even difference + # between the numbers of segments on the sides. + # @param triangleVertex: vertex of a trilateral geometrical face, around which triangles + # will be created while other elements will be quadrangles. + # Vertex can be either a GEOM_Object or a vertex ID within the + # shape to mesh + # @param UseExisting: if ==true - searches for the existing hypothesis created with + # the same parameters, else (default) - creates a new one + # @ingroup l3_hypos_quad + def QuadrangleParameters(self, quadType=StdMeshers.QUAD_STANDARD, triangleVertex=0, UseExisting=0): + vertexID = triangleVertex + if isinstance( triangleVertex, geompyDC.GEOM._objref_GEOM_Object ): + vertexID = self.mesh.geompyD.GetSubShapeID( self.mesh.geom, triangleVertex ) + if not self.params: + compFun = lambda hyp,args: \ + hyp.GetQuadType() == args[0] and \ + ( hyp.GetTriaVertex()==args[1] or ( hyp.GetTriaVertex()<1 and args[1]<1)) + self.params = self.Hypothesis("QuadrangleParams", [quadType,vertexID], + UseExisting = UseExisting, CompareMethod=compFun) + pass + if self.params.GetQuadType() != quadType: + self.params.SetQuadType(quadType) + if vertexID > 0: + self.params.SetTriaVertex( vertexID ) + return self.params - ## Defines "TrianglePreference" hypothesis, forcing construction - # of triangles in the refinement area if the number of nodes - # on the opposite edges is not the same - # - # @ingroup l3_hypos_additi - def TrianglePreference(self): - hyp = self.Hypothesis("TrianglePreference", UseExisting=1, - CompareMethod=self.CompareEqualHyp) - return hyp + ## Defines "QuadrangleParams" hypothesis with a type of quadrangulation that only + # quadrangles are built in the transition area along the finer meshed sides, + # iff the total quantity of segments on all four sides of the face is even. + # @param reversed if True, transition area is located along the coarser meshed sides. + # @param UseExisting: if ==true - searches for the existing hypothesis created with + # the same parameters, else (default) - creates a new one + # @ingroup l3_hypos_quad + def QuadranglePreference(self, reversed=False, UseExisting=0): + if reversed: + return self.QuadrangleParameters(QUAD_QUADRANGLE_PREF_REVERSED,UseExisting=UseExisting) + return self.QuadrangleParameters(QUAD_QUADRANGLE_PREF,UseExisting=UseExisting) + + ## Defines "QuadrangleParams" hypothesis with a type of quadrangulation that only + # triangles are built in the transition area along the finer meshed sides. + # @param UseExisting: if ==true - searches for the existing hypothesis created with + # the same parameters, else (default) - creates a new one + # @ingroup l3_hypos_quad + def TrianglePreference(self, UseExisting=0): + return self.QuadrangleParameters(QUAD_TRIANGLE_PREF,UseExisting=UseExisting) + + ## Defines "QuadrangleParams" hypothesis with a type of quadrangulation that only + # quadrangles are built and the transition between the sides is made gradually, + # layer by layer. This type has a limitation on the number of segments: one pair + # of opposite sides must have the same number of segments, the other pair must + # have an even difference between the numbers of segments on the sides. + # @param UseExisting: if ==true - searches for the existing hypothesis created with + # the same parameters, else (default) - creates a new one + # @ingroup l3_hypos_quad + def Reduced(self, UseExisting=0): + return self.QuadrangleParameters(QUAD_REDUCED,UseExisting=UseExisting) - ## Defines "QuadrangleParams" hypothesis + ## Defines "QuadrangleParams" hypothesis with QUAD_STANDARD type of quadrangulation # @param vertex: vertex of a trilateral geometrical face, around which triangles # will be created while other elements will be quadrangles. # Vertex can be either a GEOM_Object or a vertex ID within the # shape to mesh # @param UseExisting: if ==true - searches for the existing hypothesis created with # the same parameters, else (default) - creates a new one - # - # @ingroup l3_hypos_additi + # @ingroup l3_hypos_quad def TriangleVertex(self, vertex, UseExisting=0): - vertexID = vertex - if isinstance( vertexID, geompyDC.GEOM._objref_GEOM_Object ): - vertexID = self.mesh.geompyD.GetSubShapeID( self.mesh.geom, vertex ) - hyp = self.Hypothesis("QuadrangleParams", [vertexID], UseExisting = UseExisting, - CompareMethod=lambda hyp,args: hyp.GetTriaVertex()==args[0]) - hyp.SetTriaVertex( vertexID ) - return hyp + return self.QuadrangleParameters(QUAD_STANDARD,vertex,UseExisting) # Public class: Mesh_Tetrahedron -- 2.39.2