AIS_InteractiveContext
时间: 2023-06-21 16:03:44 浏览: 66
AIS_InteractiveContext 是 OpenCASCADE 技术中用于交互式显示的类。它提供了与用户界面的交互,例如鼠标和键盘事件处理,以及计算机辅助设计 (CAD) 操作,例如选择和变换对象。AIS_InteractiveContext 还管理着场景中的所有对象,包括它们的渲染和选择状态。在 OpenCASCADE 中,AIS_InteractiveContext 是实现 CAD 应用程序的重要组件之一。
相关问题
AIS_InteractiveContext how to use
AIS_InteractiveContext is a class in Open CASCADE Technology (OCCT) that provides an interactive 3D viewer for displaying and manipulating 3D models. Here is an example of how to use it:
1. Create a window and a view:
```
Handle(Aspect_DisplayConnection) aDispConnection = new Aspect_DisplayConnection();
Handle(Aspect_Window) aWindow = new Aspect_Window(aDispConnection, "My Window", 0, 0, 640, 480);
Handle(V3d_Viewer) aViewer = new V3d_Viewer(aWindow);
```
2. Create an interactive context:
```
Handle(AIS_InteractiveContext) anInteractiveContext = new AIS_InteractiveContext(aViewer);
```
3. Load a 3D model:
```
Handle(AIS_Shape) aShape = new AIS_Shape(aSolid);
anInteractiveContext->Display(aShape, Standard_True);
```
4. Start the interactive viewer:
```
while(!aViewer->IsDone())
{
aViewer->Redraw();
}
```
This will display the 3D model and allow the user to interact with it using mouse and keyboard controls. You can also add more functionality, such as selecting and highlighting parts of the model, by using the methods provided by AIS_InteractiveContext.
Open Cascade:如何从AIS_Shape导出TopoDS_Shape?
要从AIS_Shape导出TopoDS_Shape,可以按照以下步骤进行:
1. 获取AIS_Shape对象:可以通过AIS_InteractiveContext::SelectedShape()或者AIS_InteractiveContext::Current()方法获取当前选中或者正在显示的AIS_Shape对象。
2. 获取TopoDS_Shape对象:从AIS_Shape对象中获取TopoDS_Shape对象,可以使用AIS_Shape::Shape()方法。
3. 将TopoDS_Shape对象导出:使用BRepTools::Write()方法将TopoDS_Shape对象导出到文件中。
下面是一个示例代码:
```
// 获取当前选中的AIS_Shape对象
Handle(AIS_Shape) aisShape = myAISContext->SelectedShape();
// 从AIS_Shape对象中获取TopoDS_Shape对象
TopoDS_Shape topoShape = aisShape->Shape();
// 将TopoDS_Shape对象导出到文件中
BRepTools::Write(topoShape, "output.brep");
```
需要注意的是,导出的文件格式可以是多种格式,如BREP、STEP等,需要根据实际情况进行选择。