Define the base assets path using CMake.

[3a2l]

Hi Yahia,

This fixes a bug where the examples will fail to load or run because the paths to assets (shaders, models, etc.) are using relative paths.

I defined a base ASSETS_DIR using CMake (for all projects) and concatenated that with the existing strings (minus the "assets" part).

I tested a few examples and they seem to work now.

3a2l

[yahiaetman]

That's a really good idea.
The only problem with this approach is that the absolute path will be hardcoded and thus it can't be packaged as a portable application after build. Though this shouldn't be a problem if the code is meant for educational purposes only, I still want to keep an option for it to be built and packaged (since this will be used as a reference for a course project).
I think I'll add an option to CMake to control whether the path should be absolute or relative.

[3a2l]

Could perhaps add an option for reading an environment variable ASSETS_PATH (or something similar). So the behaviour becomes:

• Read environment variable, if defined, use it.
• If not defined, fall back to the compile time definition (to be controlled during compilation with the CMake script).

I'm fine with implementing this if you like this approach.