Freecad插件开发入门、装配动画_freecad 设计python gui插件

Freecad支持C++、Python插件。

2024.3.5，当前最新版本Freecad 0.21.2。

一、Python Console

打开Freecad的 菜单： View  -> Panels -> Python Console

可以在控制台输入:

dir()

将显示当前所有已载入模型。

dir(App)

将显示App的模块。

注意大小写。

from PySide.QtWidgets import QWidget, QPushButton, QApplication, QMessageBox
QMessageBox.information(None, 'about Exploded Assembly', 'created by stonewu。2024')

注意当前是qt5。

二、插件HelloWorld

在FreeCAD_0.21.2\Mod  的目录下创建一个目录：Stone

在Stone目录下放置python脚本：InitGui.py

class StoneWorkbench ( Workbench ):
    "Stone workbench object"
    def __init__(self):
        self.__class__.Icon = FreeCAD.getResourceDir() + "Mod/Start/Resources/icons/StartWorkbench.svg"
        self.__class__.MenuText = "Stone2024"
        self.__class__.ToolTip = "Stone workbench"
 
    def Initialize(self):
        # load the module
        import StartGui
        import Start
 
    def GetClassName(self):
        return "StartGui::Workbench"
 
Gui.addWorkbench(StoneWorkbench())

重启Freecad后，在Workbenches列表里，就可以看到一个新插件Stone2024。

当然，这个插件啥功能也没有。

三、装配动画插件

ExplodedAssembly

Features

1. Create nice explosions of assemblies graphically (no code at all!)
2. Create sub-exploded groups
3. Give rotation to screws and nuts for realistic disassembles
4. Use the provided auxiliary assembly tools to place your parts together
5. TODO feature: create trajectory from wires and sketches

插件演示效果如下：

动画演示的插件，我做了简单修改：添加了2个工具按钮，不再创建空白文档。

原始插件是外国人开发，代码下载地址： stoneold/ExplodedAssembly

修改InitGui.py

__title__="Exploded Assembly Workbench for FreeCAD"
__author__ = "stonewu/Javier Martínez García"
__url__ = "https://blog.csdn.net/stonewu"
 
import FreeCAD
import FreeCADGui
 
class ExplodedAssembly(Workbench):
    import EAInit# this is needed to load the workbench icon
    # __dir__ = os.path.dirname( __file__ ) # __file__ is not working
    Icon = EAInit.__dir__ + '/icons/WorkbenchIcon.svg'
    MenuText = 'AssemblyExploded'
    ToolTip = 'Assemble parts and create exploded drawings and animations'
 
    def GetClassName(self):
        return 'Gui::PythonWorkbench'
 
    def Initialize(self):
        import EAInit
        self.CreateExplodedAssemblyTools = ['CreateExplodedAssembly',
                              'About']
#added by stone 2024-03-05 添加工具栏按钮
 
        self.CreationTools = ['CreateBoltGroup',
                              'CreateSimpleGroup',
                              'ModifyIndividualObjectTrajectory',
                              'PlaceBeforeSelectedTrajectory',
                              'ToggleTrajectoryVisibility']
 
        self.CameraAnimation = ['CreateManualCamera',
                                'CreateEdgeCamera',
                                'CreateFollowCamera']
 
        self.AnimationControlTools = ['GoToStart',
                                      'PlayBackward',
                                      'StopAnimation',
                                      'PlayForward',
                                      'GoToEnd',
                                      'GoToSelectedTrajectory']
 
        self.AuxiliaryAssemblyTools = ['AlignToEdge',
                                       'Rotate15',
                                       'PointToPoint',
                                       'PlaceConcentric']
 
        self.Menu_tools = ['CreateExplodedAssembly',
                              'CreateBoltGroup',
                              'CreateSimpleGroup',
                              'ModifyIndividualObjectTrajectory',
                              'PlaceBeforeSelectedTrajectory',
                              'GoToSelectedTrajectory',
                              'GoToStart',
                              'PlayBackward',
                              'StopAnimation',
                              'PlayForward',
                              'GoToEnd',
                              'ToggleTrajectoryVisibility',
                              'AlignToEdge',
                              'Rotate15',
                              'PointToPoint',
                              'PlaceConcentric',
                              'LoadExampleFile',
                              'LoadExample2']
#added by stone 2024-03-05 添加工具栏
        self.appendToolbar('ExplodedAssemblyTools', self.CreateExplodedAssemblyTools)
        self.appendToolbar('ExplodedAssemblyCreationTools', self.CreationTools)
        #self.appendToolbar('ExplodedAssemblyCameraTools', self.CameraAnimation)
        self.appendToolbar('ExplodedAssemblyAnimationControlTools', self.AnimationControlTools)
        self.appendToolbar('ExplodedAssemblyAuxiliarAssemblyTools', self.AuxiliaryAssemblyTools)
        self.appendMenu('ExplodedAssembly', self.Menu_tools)
 
    def Activated(self):
        #import ExplodedAssembly as ea
        #if not(FreeCAD.ActiveDocument):
        #    FreeCAD.newDocument()
 
        #ea.checkDocumentStructure()
        FreeCAD.Console.PrintMessage('Exploded Assembly workbench loaded\n')
 
 
FreeCADGui.addWorkbench(ExplodedAssembly)

 修改EAInit.py

#请参考原代码，在合适位置 添加以下代码
# 有疑问，欢迎咨询stone wu 微信：23245175
 
from PySide.QtWidgets import QWidget, QPushButton, QApplication, QMessageBox
 
 
class CreateExplodedAssembly:
    def GetResources(self):
        return {'Pixmap': __dir__ + '/icons/WorkbenchIcon.svg',
                'MenuText': 'CreateExplodedAssembly',
                'ToolTip': 'CreateExplodedAssembly'}
 
    def IsActive(self):		
        if not(FreeCADGui.ActiveDocument):
            return False
        return True
 
    def Activated(self):
        import ExplodedAssembly as ea
        ea.checkDocumentStructure()
        
class About:
    def GetResources(self):
        return {'Pixmap': __dir__ + '/icons/ShareCenter.svg',
                'MenuText': 'About ExplodedAssembly',
                'ToolTip': 'ExplodedAssembly created by stonewu'}
 
    def IsActive(self):
        return True
 
    def Activated(self):
        FreeCAD.Console.PrintMessage('about, Exploded Assembly created by stonewu\n')
        QMessageBox.information(None, 'about Exploded Assembly', 'created by stonewu。2024')
        
 
 
 
 
if FreeCAD.GuiUp:
    FreeCAD.Gui.addCommand('CreateExplodedAssembly', CreateExplodedAssembly())
    FreeCAD.Gui.addCommand('About', About())

修改ExplodedAssembly.py

# 只修改checkDocumentStructure方法
def checkDocumentStructure():
    # checks the existence of the folder 'ExplodedAssembly' and creates it if not
    try:
        folder = FreeCAD.ActiveDocument.ExplodedAssembly
        FreeCAD.Console.PrintMessage('Exploded Assembly exist\n')
 
    except:
        folder = FreeCAD.ActiveDocument.addObject('App::DocumentObjectGroupPython', 'ExplodedAssembly')
        ExplodedAssemblyFolder(folder)
        ExplodedAssemblyFolderViewProvider(folder.ViewObject)
        FreeCAD.Console.PrintMessage('Exploded Assembly created\n')

四、继续学习使用ExplodedAssembly

装配动画：

学习制作装配体，并制作动画

最近在做利用知识图谱，自动解析装配模型，并生成装配模型。

欢迎3维几何内核相关研发人员联系交流，共同进步。微信：23245175 ，加好友，敬请备注：几何内核。