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This article mainly explains "how to run OSG correctly". The content of the explanation is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn how to run OSG correctly.

How to find command line parameters? # # #

The main function is handled here as an entry to a program with many command line arguments. In many cases of OSG, you need to provide parameters, otherwise you need to call the default file. Note that if you run OSG directly, the example may just flash by, normally, don't panic, just analyze what command line arguments are needed to run correctly. In the case of the osgviewer program, let's look at the relevant handlers:

Arguments.getApplicationUsage ()-> setApplicationName (arguments.getApplicationName ()); / / set the name of the program arguments.getApplicationUsage ()-> setDescription (arguments.getApplicationName () + "is the standard OpenSceneGraph example which loads and visualises 3D models."); / / simply describe arguments.getApplicationUsage ()-> setCommandLineUsage (arguments.getApplicationName () + "[options] filename..."); / / usage of the example arguments.getApplicationUsage ()-> addCommandLineOption ("- image", "Load an image and render it on a quad") / / parameters. (omit some)

Here you can read what the program is, what the specific usage is, and the usage of some parameters.

After determining what parameters to pass, on the one hand, you can enter instructions directly in the "command line" (if you are familiar with it). Another method is in the project's property page, select "debugging", "Command parameters" to add the desired instructions. This will make most of the examples work.

Make sure your environment variables are correct

Sometimes even if you set command line parameters, some files can't be found. Note that the OSG example requires some files to execute, and you can find the files needed for these examples here.

After downloading, decompress and place it, for example, I put it in E:osgOpenSceneGraph-Data, then I also need to set the environment variable (how to set it, please BAIDU). Add an environment variable named OSG_FILE_PATH with a value of E:osgOpenSceneGraph-Data, so that most examples do not require you to provide additional files to work. In addition, if you still report some warning, the corresponding plug-in may not be found, please set the location of your OSG plug-in correctly in the PATH environment variable.

If you still don't work? # # #

What if all the above is correct and still does not work? Make sure your graphics card supports the examples correctly. Some advanced examples need to be supported by newer graphics cards. For example, Examples osggeometryshaders needs a DX10 series graphics card to work correctly. Generally speaking, if something goes wrong, the console will output the corresponding information. Some graphics cards may not support certain extensions, which can also be known from the console output. After confirming the above three points, most of the examples can run successfully, of course, if you are really unlucky, please follow the source code to find the cause, then you will know more about OSG.

Thank you for your reading, the above is the content of "how to run OSG correctly". After the study of this article, I believe you have a deeper understanding of how to run OSG correctly, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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