#!/usr/bin/env python
# -*- coding:utf-8 -*-
##Copyright 2009-2015 Thomas Paviot (tpaviot@gmail.com)
##
##This file is part of pythonOCC.
##
##pythonOCC is free software: you can redistribute it and/or modify
##it under the terms of the GNU Lesser General Public License as published by
##the Free Software Foundation, either version 3 of the License, or
##(at your option) any later version.
##
##pythonOCC is distributed in the hope that it will be useful,
##but WITHOUT ANY WARRANTY; without even the implied warranty of
##MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
##GNU Lesser General Public License for more details.
##
##You should have received a copy of the GNU Lesser General Public License
##along with pythonOCC. If not, see <http://www.gnu.org/licenses/>.
import math
from OCC.gp import gp_Pnt, gp_OX, gp_Vec, gp_Trsf, gp_DZ, gp_Ax2, gp_Ax3, gp_Pnt2d, gp_Dir2d, gp_Ax2d
from OCC.GC import GC_MakeArcOfCircle, GC_MakeSegment
from OCC.GCE2d import GCE2d_MakeSegment
from OCC.Geom import Geom_Plane, Geom_CylindricalSurface, Handle_Geom_Plane, Handle_Geom_Surface
from OCC.Geom2d import Geom2d_Ellipse, Geom2d_TrimmedCurve, Handle_Geom2d_Ellipse, Handle_Geom2d_Curve
from OCC.BRepBuilderAPI import BRepBuilderAPI_MakeEdge, BRepBuilderAPI_MakeWire, BRepBuilderAPI_MakeFace, \
BRepBuilderAPI_Transform
from OCC.BRepPrimAPI import BRepPrimAPI_MakePrism, BRepPrimAPI_MakeCylinder
from OCC.BRepFilletAPI import BRepFilletAPI_MakeFillet
from OCC.BRepAlgoAPI import BRepAlgoAPI_Fuse
from OCC.BRepOffsetAPI import BRepOffsetAPI_MakeThickSolid, BRepOffsetAPI_ThruSections
from OCC.BRepLib import breplib
from OCC.BRep import BRep_Tool_Surface, BRep_Builder
from OCC.TopoDS import topods, TopoDS_Edge, TopoDS_Compound
from OCC.TopExp import TopExp_Explorer
from OCC.TopAbs import TopAbs_EDGE, TopAbs_FACE
from OCC.TopTools import TopTools_ListOfShape
from OCC.Display.SimpleGui import *
def face_is_plane(face):
"""
判断 TopoDS_Shape 是不是 plane
"""
hs = BRep_Tool_Surface(face)
downcast_result = Handle_Geom_Plane.DownCast(hs)
# 不能通过Handle_Geom_Plane转换的不是平面
return not downcast_result.IsNull()
def geom_plane_from_face(aFace):
"""
通过 planar surface 得到 geometric plane
"""
return Handle_Geom_Plane.DownCast(BRep_Tool_Surface(aFace)).GetObject()
height = 70
width = 50
thickness = 30
if 1:
# 准备用来创建 瓶身 的点
aPnt1 = gp_Pnt(-width / 2.0, 0, 0)
aPnt2 = gp_Pnt(-width / 2.0, -thickness / 4.0, 0)
aPnt3 = gp_Pnt(0, -thickness / 2.0, 0)
aPnt4 = gp_Pnt(width / 2.0, -thickness / 4.0, 0)
aPnt5 = gp_Pnt(width / 2.0, 0, 0)
# 瓶底断面线段和圆弧
aArcOfCircle = GC_MakeArcOfCircle(aPnt2, aPnt3, aPnt4)
aSegment1 = GC_MakeSegment(aPnt1, aPnt2)
aSegment2 = GC_MakeSegment(aPnt4, aPnt5)
# 除了下面的方法, 也可以不用上面的segment,而通过点直接创建线段edges
aEdge1 = BRepBuilderAPI_MakeEdge(aSegment1.Value())
aEdge2 = BRepBuilderAPI_MakeEdge(aArcOfCircle.Value())
aEdge3 = BRepBuilderAPI_MakeEdge(aSegment2.Value())
# 通过edges 创建 wire
aWire = BRepBuilderAPI_MakeWire(aEdge1.Edge(), aEdge2.Edge(), aEdge3.Edge())
# 得到X轴的便捷方式
xAxis = gp_OX()
# 设置镜像轴
aTrsf = gp_Trsf()
aTrsf.SetMirror(xAxis)
# 应用镜像变换
aBRespTrsf = BRepBuilderAPI_Transform(aWire.Wire(), aTrsf)
# 得到镜像 shape
aMirroredShape = aBRespTrsf.Shape()
# 通过通用shape得到 wire
aMirroredWire = topods.Wire(aMirroredShape)
# 组合两个wire
mkWire = BRepBuilderAPI_MakeWire()
mkWire.Add(aWire.Wire())
mkWire.Add(aMirroredWire)
myWireProfile = mkWire.Wire()
# 创建用于体拉伸 sweep 的面
myFaceProfile = BRepBuilderAPI_MakeFace(myWireProfile)
# 我们把面沿Z轴拉伸到指定高度
aPrismVec = gp_Vec(0, 0, height)
myBody = BRepPrimAPI_MakePrism(myFaceProfile.Face(), aPrismVec)
# 通过explorer对所有边加倒角
mkFillet = BRepFilletAPI_MakeFillet(myBody.Shape())
anEdgeExplorer = TopExp_Explorer(myBody.Shape(), TopAbs_EDGE)
while anEdgeExplorer.More():
anEdge = topods.Edge(anEdgeExplorer.Current())
mkFillet.Add(thickness / 12.0, anEdge)
anEdgeExplorer.Next()
myBody = mkFillet
# 创建瓶颈
neckLocation = gp_Pnt(0, 0, height)
neckAxis = gp_DZ()
neckAx2 = gp_Ax2(neckLocation, neckAxis)
myNeckRadius = thickness / 4.0
myNeckHeight = height / 10.0
mkCylinder = BRepPrimAPI_MakeCylinder(neckAx2, myNeckRadius, myNeckHeight)
myBody = BRepAlgoAPI_Fuse(myBody.Shape(), mkCylinder.Shape())
# 下面找到Z最高的面, 并将它移除
faceToRemove = None
zMax = -1
# 遍历所有的面, 查找Z最高的面
aFaceExplorer = TopExp_Explorer(myBody.Shape(), TopAbs_FACE)
while aFaceExplorer.More():
aFace = topods.Face(aFaceExplorer.Current())
if face_is_plane(aFace):
aPlane = geom_plane_from_face(aFace)
aPnt = aPlane.Location()
aZ = aPnt.Z()
if aZ > zMax:
zMax = aZ
faceToRemove = aFace
aFaceExplorer.Next()
facesToRemove = TopTools_ListOfShape()
facesToRemove.Append(faceToRemove)
myBody = BRepOffsetAPI_MakeThickSolid(myBody.Shape(), facesToRemove, -thickness / 50.0, 0.001)
# 建立需要创建螺纹的瓶颈表面
neckAx2_Ax3 = gp_Ax3(neckLocation, gp_DZ())
aCyl1 = Geom_CylindricalSurface(neckAx2_Ax3, myNeckRadius * 0.99)
aCyl2 = Geom_CylindricalSurface(neckAx2_Ax3, myNeckRadius * 1.05)
# 建立创建螺纹的曲线
aPnt = gp_Pnt2d(2.0 * math.pi, myNeckHeight / 2.0)
aDir = gp_Dir2d(2.0 * math.pi, myNeckHeight / 4.0)
anAx2d = gp_Ax2d(aPnt, aDir)
aMajor = 2.0 * math.pi
aMinor = myNeckHeight / 5.0
anEllipse1 = Geom2d_Ellipse(anAx2d, aMajor, aMinor)
anEllipse2 = Geom2d_Ellipse(anAx2d, aMajor, aMinor / 8.0)
anArc1 = Geom2d_TrimmedCurve(Handle_Geom2d_Ellipse(anEllipse1), 0, math.pi)
anArc2 = Geom2d_TrimmedCurve(Handle_Geom2d_Ellipse(anEllipse2), 0, math.pi)
anEllipsePnt1 = anEllipse1.Value(0)
anEllipsePnt2 = anEllipse1.Value(math.pi)
aSegment = GCE2d_MakeSegment(anEllipsePnt1, anEllipsePnt2)
# 构建用于螺纹的边和环
anEdge1OnSurf1 = BRepBuilderAPI_MakeEdge(Handle_Geom2d_Curve(anArc1), Handle_Geom_Surface(aCyl1))
anEdge2OnSurf1 = BRepBuilderAPI_MakeEdge(aSegment.Value(), Handle_Geom_Surface(aCyl1))
anEdge1OnSurf2 = BRepBuilderAPI_MakeEdge(Handle_Geom2d_Curve(anArc2), Handle_Geom_Surface(aCyl2))
anEdge2OnSurf2 = BRepBuilderAPI_MakeEdge(aSegment.Value(), Handle_Geom_Surface(aCyl2))
threadingWire1 = BRepBuilderAPI_MakeWire(anEdge1OnSurf1.Edge(), anEdge2OnSurf1.Edge())
threadingWire2 = BRepBuilderAPI_MakeWire(anEdge1OnSurf2.Edge(), anEdge2OnSurf2.Edge())
# 计算边和环的三维表现
breplib.BuildCurves3d(threadingWire1.Shape())
breplib.BuildCurves3d(threadingWire2.Shape())
# 创建螺纹的表面
aTool = BRepOffsetAPI_ThruSections(True)
aTool.AddWire(threadingWire1.Wire())
aTool.AddWire(threadingWire2.Wire())
aTool.CheckCompatibility(False)
myThreading = aTool.Shape()
# 构建组合结果
aRes = TopoDS_Compound()
aBuilder = BRep_Builder()
aBuilder.MakeCompound(aRes)
aBuilder.Add(aRes, myBody.Shape())
aBuilder.Add(aRes, myThreading)
display, start_display, add_menu, add_function_to_menu = init_display()
display.DisplayColoredShape(aRes)
start_display()
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