Changes between Version 9 and Version 10 of python

Timestamp:

Nov 28, 2011, 9:25:23 AM (13 years ago)

Author:

Leon Kos

Comment:

Pobriši OCC uvod

python

@@ -151 +151 @@
 }}}
 
-== Predstavitev CAD-jedra Open CASCADE na primerih ==
-=== Pregled uporabljenih OCC knjižnic ===
-{{{
-#!python
-## Importanje različnih knjižnic
-
-# Uporabniški vmesnik GUI
-from OCC.Display.SimpleGui import *
-
-# Matematična knjižnica
-import math
-
-# OpenCascade
-from OCC.gp import * #točke
-from OCC.BRepBuilderAPI import * #gradimo robove, segmente, mreže ...
-from OCC.BRepPrimAPI import * #izdelava osnovnih geometrijskih primitivov
-from OCC.BRepFilletAPI import * #izdelava zaokrožitev
-}}}
-
-Točnejša navodila, opis funkcij in knjižnic lahko dobimo v PythonOCC dokumentaciji.
-
-=== Inicializacija zaslona in izdelava grafičnega vmesnika===
-{{{
-#!python
-# OCC.Display.SimpleGui.init_display() returns multiple
-# values which are assigned here
-display, start_display, add_menu, add_function_to_menu = \
-init_display()
-draw_bottle() #kličemo CAD model, ki ga želimo prikazati na zaslonu
-start_display()
-}}}
-=== Risanje točk v prostoru ===
-Izdelava točk v prostoru je najosnovnejša operacija v OCC.
-{{{
-#!python
-# Definiranje začetnih točk
-aPnt1 = gp_Pnt(-myWidth / 2. , 0 , 0)
-aPnt2 = gp_Pnt(-myWidth / 2. , -myThickness / 4. , 0)
-aPnt3 = gp_Pnt(0 , -myThickness / 2. , 0)
-aPnt4 = gp_Pnt(myWidth / 2. , -myThickness / 4. , 0)
-aPnt5 = gp_Pnt(myWidth / 2. , 0 , 0)
-}}}
-
-=== Izdelava robnih elementov ===
-V naslednjem koraku se iz začetnih točk izdela robove:
-{{{
-#!python
-# Definiranje geometrije
-aArcOfCircle = GC_MakeArcOfCircle(aPnt2,aPnt3 ,aPnt4)
-aSegment1 = GC_MakeSegment(aPnt1 , aPnt2)
-aSegment2 = GC_MakeSegment(aPnt4 , aPnt5)
-
-# Definiranje topologije
-aEdge1 = BRepBuilderAPI_MakeEdge(aSegment1.Value())
-aEdge2 = BRepBuilderAPI_MakeEdge(aArcOfCircle.Value())
-aEdge3 = BRepBuilderAPI_MakeEdge(aSegment2.Value())
-}}}
-=== Povezovanje robnih elementov v mreže ===
-Robne elemente se v nadaljevanju združi v mrežo.
-{{{
-#!python
-# Izdelava mreže
-aWire  = BRepBuilderAPI_MakeWire(aEdge1.Edge() , aEdge2.Edge() ,aEdge3.Edge())
-}}}
-=== Uporaba funkcij za izdelavo objektov v prostoru ===
-{{{
-#!python
-# Izdelava celotnega profila - mirror
-xAxis = gp_OX()
-aTrsf = gp_Trsf()
-aTrsf.SetMirror(xAxis)
-aBRepTrsf = BRepBuilderAPI_Transform(aWire.Shape() , aTrsf)
-aMirroredShape = aBRepTrsf.Shape()
-aMirroredWire = TopoDS_wire(aMirroredShape)
-mkWire = BRepBuilderAPI_MakeWire()
-mkWire.Add(aWire.Wire())
-mkWire.Add(aMirroredWire)
-myWireProfile = mkWire.Wire()
-
-# Telo: Iz profila se izdela telo (Funkcija izvleka 3D)
-myFaceProfile = BRepBuilderAPI_MakeFace(myWireProfile)
-aPrismVec = gp_Vec(0 , 0 , myHeight)
-myBody = BRepPrimAPI_MakePrism(myFaceProfile.Face() , aPrismVec)
-}}}
-
-=== Risanje geometrijskih primitivov ===
-V OCC že obstajajo funkcije za izdelavo geometrijskih primitivov (kocka, valj,...), kar je prikazano na spodnjem primeru.
-{{{
-#!python
-from OCC.Display.SimpleGui import *
-from OCC.BRepPrimAPI import *
-
-display, start_display, add_menu, add_function_to_menu = init_display()
-my_box = BRepPrimAPI_MakeBox(10.,20.,30.).Shape()
-# ali my_cylinder = BRepPrimAPI_MakeCylinder(neckAx2 , myNeckRadius , myNeckHeight), kjer so spremenljivke že preddefinirane 
-
-display.DisplayShape(my_box) # ali display.DisplayShape(my_cylinder)
-start_display()
-}}}
-=== Izdelava primera Bottle z uporabo programskega jezika Python in knjižnice OCC ===
-Naslednji primer prikazuje izdelavo primera BottleCAD. Podrobnejši razdelek posameznih delov programske kode dobimo na [[http://trac.lecad.si/vaje/wiki/OpenCascade|MakeBottleCAD(C++)]].
-{{{
-#!python
-##Copyright 2011 Simon Kulovec (simon.kulovec@lecad.si)
-##Example: MakeCADBottle
-##This file is part of pythonOCC.
-
-## Importanje različnih knjižnic
-
-# Uporabniški vmesnik GUI
-from OCC.Display.SimpleGui import *
-
-# OpenCascade
-from OCC.gp import *
-from OCC.TopoDS import *
-from OCC.GC import *
-from OCC.BRepBuilderAPI import *
-from OCC.BRepPrimAPI import *
-from OCC.BRepFilletAPI import *
-from OCC.BRepAlgoAPI import *
-from OCC.Utils.Topology import *
-from OCC.Geom import *
-from OCC.Geom2d import *
-from OCC.GCE2d import *
-from OCC.BRep import *
-from OCC.BRepLib import *
-from OCC.BRepOffsetAPI import *
-from OCC.TopTools import *
-from OCC.TopAbs import *
-from OCC.TopExp import *
-
-import math
-
-def show_bottle(aRes):
-    display.EraseAll()
-    print dir(display)
-    display.DisplayShape(aRes)
-
-def define_points(myWidth, myThickness, myHeight):
-    #Definiranje začetnih točk
-    aPnt1 = gp_Pnt(-myWidth / 2. , 0 , 0)
-    aPnt2 = gp_Pnt(-myWidth / 2. , -myThickness / 4. , 0)
-    aPnt3 = gp_Pnt(0 , -myThickness / 2. , 0)
-    aPnt4 = gp_Pnt(myWidth / 2. , -myThickness / 4. , 0)
-    aPnt5 = gp_Pnt(myWidth / 2. , 0 , 0)
-
-    #Definiranje geometrije
-    aArcOfCircle = GC_MakeArcOfCircle(aPnt2,aPnt3 ,aPnt4)
-    aSegment1 = GC_MakeSegment(aPnt1 , aPnt2)
-    aSegment2 = GC_MakeSegment(aPnt4 , aPnt5)
-
-    #Definiranje topologije
-    aEdge1 = BRepBuilderAPI_MakeEdge(aSegment1.Value())
-    aEdge2 = BRepBuilderAPI_MakeEdge(aArcOfCircle.Value())
-    aEdge3 = BRepBuilderAPI_MakeEdge(aSegment2.Value())
-    aWire  = BRepBuilderAPI_MakeWire(aEdge1.Edge() , aEdge2.Edge() ,aEdge3.Edge())
-
-    #Izdelava celotnega profila - mirror
-    xAxis = gp_OX()
-    aTrsf = gp_Trsf()
-    aTrsf.SetMirror(xAxis)
-    aBRepTrsf = BRepBuilderAPI_Transform(aWire.Shape() , aTrsf)
-    aMirroredShape = aBRepTrsf.Shape()
-    aMirroredWire = TopoDS_wire(aMirroredShape)
-    mkWire = BRepBuilderAPI_MakeWire()
-    mkWire.Add(aWire.Wire())
-    mkWire.Add(aMirroredWire)
-    myWireProfile = mkWire.Wire()
-
-    # Telo: Iz profila se izdela telo
-    myFaceProfile = BRepBuilderAPI_MakeFace(myWireProfile)
-    aPrismVec = gp_Vec(0 , 0 , myHeight)
-    myBody = BRepPrimAPI_MakePrism(myFaceProfile.Face() , aPrismVec)
-
-    # Telo: Dodamo zaokrožitve (fillet)
-    mkFillet = BRepFilletAPI_MakeFillet(myBody.Shape())
-    topology_traverser = Topo(myBody.Shape())
-    for aEdge in topology_traverser.edges():
-        mkFillet.Add(myThickness / 12. , aEdge)
-    myBody = mkFillet.Shape()
-
-    #Dodajanje grla na steklenico
-    neckLocation = gp_Pnt(0, 0, myHeight)
-    neckNormal = gp_DZ()
-    neckAx2 = gp_Ax2(neckLocation, neckNormal)
-
-    myNeckRadius = myThickness / 4
-    myNeckHeight = myHeight / 10
-
-    mkCylinder = BRepPrimAPI_MakeCylinder(neckAx2 , myNeckRadius , \
-                                          myNeckHeight)
-    myNeck = mkCylinder.Shape();
-
-    myBody = BRepAlgoAPI_Fuse(myBody, myNeck)
-
-    # Izdelava votle steklenice
-    faceToRemove = None
-    zMax = -1;
-    t = Topo(myBody.Shape())
-    k=1
-    for  aFace in t.faces():
-    
-        aSurface = BRep_Tool().Surface(aFace)
-    
-        if aSurface.GetObject().IsInstance('Geom_Plane'):
-            aPlane = Handle_Geom_Plane().DownCast(aSurface).GetObject()
-            aPnt = aPlane.Location()
-            aZ = aPnt.Z()
-            if aZ>zMax:
-                faceToRemove = aFace
-
-    facesToRemove = TopTools_ListOfShape()
-    facesToRemove.Append(faceToRemove)
-    myBody = BRepOffsetAPI_MakeThickSolid(myBody.Shape() , facesToRemove , \
-                                          -myThickness/50 , 1.e-3)
-    
-    # Threading : Create Surfaces
-    aCyl1 = Geom_CylindricalSurface(gp_Ax3(neckAx2) , myNeckRadius * 0.99)
-    aCyl2 = Geom_CylindricalSurface(gp_Ax3(neckAx2) , myNeckRadius * 1.05)
-
-    # Threading : Define 2D Curves
-    aPnt = gp_Pnt2d(2. * 3.141592 , myNeckHeight / 2.)
-    aDir = gp_Dir2d(2. * 3.141592 , myNeckHeight / 4.)
-    aAx2d = gp_Ax2d(aPnt , aDir)
-        
-    aMajor = 2. * 3.141592
-    aMinor = myNeckHeight / 10.
-    
-    anEllipse1 = Geom2d_Ellipse(aAx2d , aMajor , aMinor)
-    anEllipse2 = Geom2d_Ellipse(aAx2d , aMajor , aMinor / 4)
-
-    aArc2 = Geom2d_TrimmedCurve(anEllipse1.GetHandle() , 3.141592, 0.)
-    aArc1 = Geom2d_TrimmedCurve(anEllipse2.GetHandle() , 3.141592, 0.)
-
-    anEllipsePnt2 = anEllipse1.Value(0.)
-    anEllipsePnt1 = anEllipse1.Value(3.141592)
-    
-    aSegment = GCE2d_MakeSegment(anEllipsePnt1 , anEllipsePnt2)
-
-    # Threading : Build Edges and Wires
-    aEdge1OnSurf1 = BRepBuilderAPI_MakeEdge(aArc1.GetHandle() , aCyl1.GetHandle())
-    aEdge2OnSurf1 = BRepBuilderAPI_MakeEdge(aSegment.Value() , aCyl1.GetHandle())
-    aEdge1OnSurf2 = BRepBuilderAPI_MakeEdge(aArc2.GetHandle() , aCyl2.GetHandle())
-    aEdge2OnSurf2 = BRepBuilderAPI_MakeEdge(aSegment.Value() , aCyl2.GetHandle())
-    print dir(aEdge1OnSurf1)
-    threadingWire1 = BRepBuilderAPI_MakeWire(aEdge1OnSurf1.Edge() , aEdge2OnSurf1.Edge())
-    threadingWire2 = BRepBuilderAPI_MakeWire(aEdge1OnSurf2.Edge() , aEdge2OnSurf2.Edge())
 
 
-    BRepLib().BuildCurves3d(threadingWire1.Wire())
-    BRepLib().BuildCurves3d(threadingWire2.Wire())
-
-    # Create Threading
-    aTool = BRepOffsetAPI_ThruSections(True)
-
-    aTool.AddWire(threadingWire1.Wire())
-    aTool.AddWire(threadingWire2.Wire())
-    aTool.CheckCompatibility(False)
-
-    myThreading = aTool.Shape()
-
-    # Izdelava sestava
-    aRes = TopoDS_Compound()
-
-    aBuilder = BRep_Builder()
-    aBuilder.MakeCompound (aRes)
-
-    aBuilder.Add (aRes, myBody.Shape())
-    aBuilder.Add (aRes, myThreading)
-
-    # Izris oblike
-    show_bottle(aPnt1)
-
-def draw_bottle(event=None):
-    # Definiranje razdalj: širina, dolžina, višina
-    myWidth = 50.0
-    myThickness = 30.0
-    myHeight = 70.0
-    # Define Points
-    define_points(myWidth, myThickness, myHeight)
-    
-if __name__ == '__main__':
-    # OCC.Display.SimpleGui.init_display() returns multiple
-    # values which are assigned here
-    display, start_display, add_menu, add_function_to_menu = \
-    init_display()
-    draw_bottle() #kličemo podprogram za izris bottle
-    start_display()
-}}}
-