# Creating a hexahedral mesh on a cylinder.
-# Note: it is a copy of 'ex24_cylinder.py' from SMESH_SWIG
+#
+# This example uses Partition to divide the cylinder into blocks, which is
+# a general approach. But for the case of cylinder there is a dedicated
+# command creating a blocked cylinder: geompy.MakeDividedCylinder()
-import math
-
-import geompy
-import smesh
import salome
-geo = geompy
+salome.salome_init()
+import GEOM
+from salome.geom import geomBuilder
+geompy = geomBuilder.New()
+
+import SMESH, SALOMEDS
+from salome.smesh import smeshBuilder
+smesh = smeshBuilder.New()
+
+import math
# Parameters
# ----------
# Build a cylinder
# ----------------
-base = geo.MakeVertex(0, 0, 0)
-direction = geo.MakeVectorDXDYDZ(0, 0, 1)
+base = geompy.MakeVertex(0, 0, 0)
+direction = geompy.MakeVectorDXDYDZ(0, 0, 1)
-cylinder = geo.MakeCylinder(base, direction, radius, height)
+cylinder = geompy.MakeCylinder(base, direction, radius, height)
-geo.addToStudy(cylinder, "cylinder")
+geompy.addToStudy(cylinder, "cylinder")
# Build blocks
# ------------
size = radius/2.0
-box_rot = geo.MakeBox(-size, -size, 0, +size, +size, height)
-box_axis = geo.MakeLine(base, direction)
-box = geo.MakeRotation(box_rot, box_axis, math.pi/4)
+box_rot = geompy.MakeBox(-size, -size, 0, +size, +size, height)
+box_axis = geompy.MakeLine(base, direction)
+box = geompy.MakeRotation(box_rot, box_axis, math.pi/4)
-hole = geo.MakeCut(cylinder, box)
+hole = geompy.MakeCut(cylinder, box)
plane_trim = 2000
-plane_a = geo.MakePlane(base, geo.MakeVectorDXDYDZ(1, 0, 0), plane_trim)
-plane_b = geo.MakePlane(base, geo.MakeVectorDXDYDZ(0, 1, 0), plane_trim)
+plane_a = geompy.MakePlane(base, geompy.MakeVectorDXDYDZ(1, 0, 0), plane_trim)
+plane_b = geompy.MakePlane(base, geompy.MakeVectorDXDYDZ(0, 1, 0), plane_trim)
-blocks_part = geo.MakePartition([hole], [plane_a, plane_b], [], [], geo.ShapeType["SOLID"])
-blocks_list = [box] + geo.SubShapeAll(blocks_part, geo.ShapeType["SOLID"])
-blocks_all = geo.MakeCompound(blocks_list)
-blocks = geo.MakeGlueFaces(blocks_all, 0.0001)
+blocks_part = geompy.MakePartition([hole], [plane_a, plane_b], [], [], geompy.ShapeType["SOLID"])
+blocks_list = [box] + geompy.SubShapeAll(blocks_part, geompy.ShapeType["SOLID"])
+blocks_all = geompy.MakeCompound(blocks_list)
+blocks = geompy.MakeGlueFaces(blocks_all, 0.0001)
-geo.addToStudy(blocks, "cylinder:blocks")
+geompy.addToStudy(blocks, "cylinder:blocks")
# Build geometric groups
# ----------------------
-def group(name, shape, type, base=None, direction=None):
- t = geo.ShapeType[type]
- g = geo.CreateGroup(shape, t)
+group_a = geompy.CreateGroup(blocks, geompy.ShapeType["FACE"])
+geompy.addToStudyInFather(blocks, group_a, "baseA")
+items = geompy.GetShapesOnPlaneWithLocationIDs(blocks, geompy.ShapeType["FACE"], direction, base, GEOM.ST_ON)
+geompy.UnionIDs(group_a, items)
- geo.addToStudy(g, name)
- g.SetName(name)
+base_b = geompy.MakeVertex(0, 0, height)
+group_b = geompy.CreateGroup(blocks, geompy.ShapeType["FACE"])
+geompy.addToStudyInFather(blocks, group_b, "baseB")
+items = geompy.GetShapesOnPlaneWithLocationIDs(blocks, geompy.ShapeType["FACE"], direction, base_b, GEOM.ST_ON)
+geompy.UnionIDs(group_b, items)
- if base!=None:
- l = geo.GetShapesOnPlaneWithLocationIDs(shape, t, direction, base, geo.GEOM.ST_ON)
- geo.UnionIDs(g, l)
-
- return g
-
-group_a = group("baseA", blocks, "FACE", base, direction)
-
-base_b = geo.MakeVertex(0, 0, height)
-group_b = group("baseB", blocks, "FACE", base_b, direction)
-
-group_1 = group("limit", blocks, "SOLID")
-group_1_all = geo.SubShapeAllIDs(blocks, geo.ShapeType["SOLID"])
-geo.UnionIDs(group_1, group_1_all)
-group_1_box = geo.GetBlockNearPoint(blocks, base)
-geo.DifferenceList(group_1, [group_1_box])
+group_1 = geompy.CreateGroup(blocks, geompy.ShapeType["SOLID"])
+geompy.addToStudyInFather(blocks, group_1, "limit")
+group_1_all = geompy.SubShapeAllIDs(blocks, geompy.ShapeType["SOLID"])
+geompy.UnionIDs(group_1, group_1_all)
+group_1_box = geompy.GetBlockNearPoint(blocks, base)
+geompy.DifferenceList(group_1, [group_1_box])
# Mesh the blocks with hexahedral
# -------------------------------
-smesh.SetCurrentStudy(salome.myStudy)
-
-def discretize(x, y, z, n, s=blocks):
- p = geo.MakeVertex(x, y, z)
- e = geo.GetEdgeNearPoint(s, p)
- a = hexa.Segment(e)
- a.NumberOfSegments(n)
- a.Propagation()
+smesh.UpdateStudy()
hexa = smesh.Mesh(blocks)
hexa_1d = hexa.Segment()
hexa_1d.NumberOfSegments(1)
-discretize(+radius , +radius, 0, 5)
-discretize(-radius , +radius, 0, 8)
-discretize((radius+size)/2, 0, 0, 10)
-discretize( +radius, 0, height/2, 20)
+vertex = geompy.MakeVertex(+radius, +radius, 0)
+edge = geompy.GetEdgeNearPoint(blocks, vertex)
+algo = hexa.Segment(edge)
+algo.NumberOfSegments(5)
+algo.Propagation()
+
+vertex = geompy.MakeVertex(-radius, +radius, 0)
+edge = geompy.GetEdgeNearPoint(blocks, vertex)
+algo = hexa.Segment(edge)
+algo.NumberOfSegments(8)
+algo.Propagation()
+
+vertex = geompy.MakeVertex((radius+size)/2, 0, 0)
+edge = geompy.GetEdgeNearPoint(blocks, vertex)
+algo = hexa.Segment(edge)
+algo.NumberOfSegments(10)
+algo.Propagation()
+
+vertex = geompy.MakeVertex(+radius, 0, height/2)
+edge = geompy.GetEdgeNearPoint(blocks, vertex)
+algo = hexa.Segment(edge)
+algo.NumberOfSegments(20)
+algo.Propagation()
hexa.Quadrangle()
hexa.Hexahedron()
