This is a simple modelviewer for libretro using the OpenGL interface. It displays basic objects in .obj format. Objects are loaded as ROMs in RetroArch.
retroarch -L libretro-modelviewer.so cool_thing.obj
Models are rotated using left RetroPad analog axis. The object is scaled with right analog.
This implementation does not support MTL materials. Instead, a simple
texture extension is used.
sets the current texture to
Foo.png relative to where the obj was loaded from.
All faces declared after will refer to this texture.
The implementation exposes a libretro core option to change internal resolution. Resolutions can be set to a scale factor of 320x240 (up to 1920x1440).
This declares a simple textured triangle:
texture blockDiamond v -1.0 -1.0 0.0 v 1.0 -1.0 0.0 v 0.0 1.0 0.0 vn 0.0 0.0 -1.0 vt 0.0 0.0 vt 1.0 0.0 vt 0.5 1.0 f 1/1/1 2/2/1 3/3/1