How to use PeasyCam (Java/.jar based Processing library)

[villares]

I have been meaning to try this for a looooong time, almost a year maybe? I've read this example many times: https://py5.ixora.io/how_tos/use_camera3D.html and now I've put the peasycam.jar and peasy-math.jar files in a subdirectory called jars next to my sketch source file.

Perhaps the jpype.imports is not need anymore, so I've tried with and without it, but I get this error:

    from PeasyCam import PeasyCam
ModuleNotFoundError: No module named 'PeasyCam'

I have also tried from peasycam import PeasyCam as it is peasycam.jar and the old add_library('peasycam') went lowercase too. And fiddled with py5tools.add_jars(), but I think it shouldn't be necessary.

Any tips?

Update: With py5_tools.get_classpath() I can see the peasycam.jar.

/home/villares/.../py5/jars/jogl-all.jar:
/home/villares/.../py5/jars/gluegen-rt.jar:
/home/villares/.../py5/jars/py5.jar:
/home/villares/.../py5/jars/core.jar:
/home/villares/.../py5/jars/pdf/pdf.jar:
/home/villares/.../py5/jars/pdf/itext.jar:
/home/villares/.../py5/jars/dxf/dxf.jar:
/home/villares/.../py5/jars/svg/svg.jar:
/home/villares/.../py5/jars/svg/batik.jar:
/home/villares/sketch/jars/peasy-math.jar:
/home/villares/sketch/jars/peasycam.jar

[hx2A]

Update: With py5_tools.get_classpath() I can see the peasycam.jar.

That was a good debugging step. Sometimes you might think the jar is being included but it is actually not. I'm happy you thought to do that.

I also tried a bunch of import statements that didn't work. Eventually I stopped guessing and got the answer by looking at the PeasyCam.java source code. The package name for that class is peasy. The line of code you need is:

from peasy import PeasyCam

There's also an example notebook using PeasyCam in py5examples with the correct import statement.

[villares]

It is working fine, I have the jars next to the sketch.
I just have a question... should there be a way of pointing to a different jars location when on imported mode? Am I missing something?
I'm thinking about translating a series of examples and I would like to point to a single folder.
When on module mode one can do it before import py5 but on imported mode it looks like a catch-22...

[hx2A]

You have a few options for ways to add jars before import py5 gets called.

You can set the environment variable $PY5_JARS to a directory. Any jars in that directory or a subdirectory will be automatically added.

If you are using the run_sketch utility, you can add jars with the --classpath command line argument.

If you are using Thonny, the py5 plugin can be enhanced to support either of these two options if it does not do one of them already.

[villares]

Perfect! I'll try stuff and think about it. I think it would be nice to have a jars folder ready in the portable Thonny for people to install their Processing libraries and I believe the environment variable might be a good way of doing it.