OpenCascade Inspector

OpenCascade Inspector is a Qt-based library that provides functionality to interactively inspect low-level content of the OCAF data model, OCCT viewer and Modeling Data. This component is aimed to assist the developers of OCCT-based applications to debug the problematic situations that occur in their applications.

Overview

Inspector has a plugin-oriented architecture with the following plugins:

Plugin	OCCT component	Root class of investigated component
DFBrowser	OCAF	TDocStd_Application
VInspector	Visualization	AIS_InteractiveContext
ShapeView	Modeling Data	TopoDS_Shape
MessageView	Modeling Data	Message_Report

Each plugin implements logic for a corresponding OCCT component and is embedded in a common framework, allowing you to manage which plugins are loaded and to extend their number by implementing new plugins.

Getting Started

There are two ways to launch the Inspector:

1. Launch TInspectorEXE executable sample
2. Launch DRAW Test Harness, load the INSPECTOR plugin, and use the tinspector command

pload INSPECTOR
tinspector

Note: Make sure that OCCT is compiled with BUILD_Inspector option ON if you don't see the Inspector library in your build directory.

Using Inspector in a Custom Application

To use Inspector in your own application:

#include <inspector/TInspector_Communicator.hxx>

// Create a global communicator instance
static TInspector_Communicator* MyTCommunicator;

void CreateInspector()
{
  NCollection_List<Handle(Standard_Transient)> aParameters;
  // Append parameters in the list

  if (!MyTCommunicator)
  {
    MyTCommunicator = new TInspector_Communicator();

    MyTCommunicator->RegisterPlugin("TKDFBrowser");
    MyTCommunicator->RegisterPlugin("TKVInspector");
    MyTCommunicator->RegisterPlugin("TKShapeView");
    MyTCommunicator->RegisterPlugin("TKMessageView");

    MyTCommunicator->Init(aParameters);
    MyTCommunicator->Activate("TKDFBrowser");
  }
  MyTCommunicator->SetVisible(true);
}

Plugins

DFBrowser

Visualizes the content of TDocStd_Application in a tree view, showing application documents, the hierarchy of TDF_Labels, the content of TDF_Attributes and interconnection between attributes.

VInspector

Visualizes interactive objects displayed in AIS_InteractiveContext in a tree view with computed selection components for each presentation.

ShapeView

Visualizes content of TopoDS_Shape in a tree view, allowing exploration of shape hierarchy.

MessageView

Displays content of Message_Report, showing alerts and metrics.

Building

To build the Inspector:

Configure OCCT with CMake:

Required 3rd-party libraries:

• Qt5
• FreeType
• Tcl
• OpenCascade

For example, to configure OCCT with CMake:

mkdir build
cd build
cmake -D3RDPARTY_QT_DIR=/path/to/Qt5 -D3RDPARTY_FREETYPE_DIR=/path/to/FreeType -D3RDPARTY_TCL_DIR=/path/to/Tcl -DOpenCASCADE_DIR=/path/to/OpenCascade /path/to/occt ..
cmake --build .

In case if QT, FreeType, Tcl, and OpenCascade are installed in the system, you can skip specifying the corresponding directories.

License

Inspector is part of OpenCascade Technology and is released under the LGPL 2.1 license with the Open CASCADE exception. See the LICENSE file for details.