Translations:Development/Tutorials/Physical Simulation/21/en

The header files should be self-explanatory. Of special interest is the second part. We create a new application by the name of "app". Then we create a new main window from the type FallingBall. The central things will happen in this class, hence mainWindow. After creation, we show the mainWindow and execute the app, which waits for user interactions, does the repainting, ...