pythonOCC版 瓶子代码

#!/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()