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Python for NX

針對 HW1 使用 NX12.0.2 教育版繪零件圖者, 可以利用下列 Python 程式修改零件參數, 取零件影像圖並計算零件體積:
參考零件: block.prt
# nx_open_part.py
# 導入 NXOpen
import NXOpen
import NXOpen.UF
import NXOpen.Gateway
    
def main():
    # 取得目前開啟的工作階段
    theSession = NXOpen.Session.GetSession()
    theUfSession = NXOpen.UF.UFSession.GetUFSession()
       
    # 建立 ListingWindow
    listWin= theSession.ListingWindow
    # 開啟零件檔案
    basePart1 = theSession.Parts.OpenBaseDisplay("c:/tmp/block.prt")
    workPart = theSession.Parts.Work
    unit1 = workPart.UnitCollection.FindObject("MilliMeter")
    # height
    p7 = workPart.Expressions.FindObject("p7")
    # width
    p8 = workPart.Expressions.FindObject("p8")
    # length
    p9 = workPart.Expressions.FindObject("p9")
    workPart.Expressions.EditWithUnits(p7, unit1, "30")
    workPart.Expressions.EditWithUnits(p8, unit1, "60")
    workPart.Expressions.EditWithUnits(p9, unit1, "90")
    theSession.UpdateManager.DoUpdate(0)
    #saveStatus1 = workPart.SaveAs("c:/tmp/block_new.prt")
    #saveStatus1.Dispose()
    # initialize list to hold bodies
    theBodyTags = []
    
    for x in workPart.Bodies:
        if x.IsSolidBody:
            theBodyTags.append(x.Tag)
       
    # 準備輸出 ASCII 格式 STL 零件檔案
    sTLCreator1 = theSession.DexManager.CreateStlCreator()
    sTLCreator1.AutoNormalGen = True
    sTLCreator1.ChordalTol = 0.08
    sTLCreator1.AdjacencyTol = 0.08
    sTLCreator1.OutputFile = "C:\\tmp\\block_ascii.stl"
    # Binary STL: NXOpen.STLCreatorOutputTypeEnum.Binary
    sTLCreator1.OutputType = NXOpen.STLCreatorOutputTypeEnum.Text
    # 已知 body1 命名
    body1 = workPart.Bodies.FindObject("EXTRUDE(2)")
    added1 = sTLCreator1.ExportSelectionBlock.Add(body1)
    nXObject1 = sTLCreator1.Commit()
    sTLCreator1.Destroy()
   
    # 開啟所建立的 ListingWindow
    listWin.Open()
    listWin.WriteLine("number of solid bodies: " + str(len(theBodyTags)))
    
    (massProps, Stats) = theUfSession.Modeling.AskMassProps3d(theBodyTags, len(theBodyTags), 1, 4, .03, 1, [0.99,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0])
    listWin.WriteLine("units: kg, mm")
    listWin.WriteLine("surface area: " + str(massProps[0]))
    listWin.WriteLine("volume: " + str(massProps[1]*1E9))
    # 在 ListingWindow 中寫入字串
    listWin.WriteLine("Hello, NXOpen")
    listWin.Close()
      
    # 將零件檔案 fit 之後, export 出 png 檔案
    theUI = NXOpen.UI.GetUI()
    imageExportBuilder1 = theUI.CreateImageExportBuilder()
  
    custombackgroundcolor1 = [None] * 3
    custombackgroundcolor1[0] = 1.0
    custombackgroundcolor1[1] = 1.0
    custombackgroundcolor1[2] = 1.0
  
    imageExportBuilder1.SetCustomBackgroundColor(custombackgroundcolor1)
    imageExportBuilder1.FileFormat = NXOpen.Gateway.ImageExportBuilder.FileFormats.Png
    imageExportBuilder1.FileName = "c:\\tmp\\block.png"
  
    imageExportBuilder1.BackgroundOption = NXOpen.Gateway.ImageExportBuilder.BackgroundOptions.Original
  
    imageExportBuilder1.EnhanceEdges = False
    imageExportBuilder1.RegionMode = False
    # fit view 後 commit export png
    workPart.ModelingViews.WorkView.Fit()
    nXObject6 = imageExportBuilder1.Commit()
  
    imageExportBuilder1.Destroy()
       
if __name__ == "__main__":
    main()
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