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twinaphex
6165449264
some function called __sincos_stret. This is however a new function added by Apple in iOS 7/OSX 10.9 versions of libm. If you compile a core with iOS 7/OSX 10.9 SDKs for an older platform, it will crash on 'undefined symbol - __sincos_stret'. So I now set minimum iPhone SDK version so that it doesn't do this "optimization"
ModelViewer libretro
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
Controls
Models are rotated using left RetroPad analog axis. The object is scaled with right analog.
Textures/materials
This implementation does not support MTL materials. Instead, a simple texture extension is used.
texture Foo
sets the current texture to Foo.png relative to where the obj was loaded from.
All faces declared after will refer to this texture.
Changing resolution
The implementation exposes a libretro core option to change internal resolution. Resolutions can be set to a scale factor of 320x240 (up to 1920x1440).
Example OBJ
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