This post explains how to record an example of a game client. Such examples can be used to test a bot and to support the development of memory reading frameworks.
The tool we use in this guide works only for 32-bit processes. 32-bit processes are marked as such in the Windows Task Manager in the
If you are working with 64-bit processes, switch to the guide at Sanderling/how-to-collect-samples-for-64-bit-memory-reading-development.md at main · Arcitectus/Sanderling · GitHub
The process measurement tool copies the memory contents of a choosen Windows process (such as a game client) and takes a screenshot from its main window and writes those to a file. This data is used in development to correlate screen contents with memory contents.
Steps to collect a sample:
- choose the source process in the “source” tab. Currently, the only way to choose a process is by selecting its main window. To select the window, tick the checkbox next to the label “pick next focused window” and then focus the window of the process to be read from. If selection was successful, the title of the selected window appears under “last picked window”.
- take the measurement. This is started by clicking the button “take measurement” in the tab “Measurement”. This might take a few seconds and freeze the UI.
- write the measurement to a file: Open windows explorer and choose a directory where the file should be placed. Drag and drop the destination directory on the button “write to file” in the tab “Measurement”. Compression of measurement happens in this stage, thus it will take some processing time and the resulting file is often smaller than the process size.
The file dropping might not work if you choose “Run as Administrator” to run the tool or use not the same windows user account as used for windows explorer.
- verify the measurement: You should see a PNG file named
Client.Raster.pngin the directory
MainWindowwhich shows a screenshot of the main window.
Things to keep in mind:
- The measurement will not contain the state of the process at a point in time because taking the measurement takes time.
- The time it takes to take a measurement or to write it to a file depends on the amount of memory allocated by the process. In some applications, memory usage will increase over time. In such cases the process can be sped up by restarting the application. In many games, reducing graphic quality settings (e.g., texture resolution) can also help to reduce the amount of allocated memory.
You can download the tool from https://botengine.blob.core.windows.net/blob-library/by-name/2019-02-02.WindowsProcessMeasurement.zip
The gif below shows how the whole procedure works: