G3D Innovation Engine Code

removed duplicate surfaces from breakfast_room.obj

Add SIMDString as G3DString (#58)

Merging in all SIMDString changes as a new and updated G3DString

Updated build instructions (#59)

Fix transparency bug (#55)

Some shader fixes (#56)

A couple weeks ago I merged a fix for Macs. The MacOS implementation of
glLinkShader does not allow uniforms to be passed as arguments in
functions, so I moved the uniform to a central file to be used as a
global variable. This is causing namespace collisions with another
variable in the ParticleShader files. This is a quick fix. We can come
back to it at later date.

Scene Viewer Updates (#44)

* Refactor Viewer to use `G3D::onGraphics3D`
* Allow scene lighting environment to be set
* Set scene lighting for Articulated, Point, MD2, and MD3 viewers after
creation
* Reset visible GUIs and camera before changing to new viewer

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Co-authored-by: Linwan Song <lsong@...>

Freeimagelib upgrade 3.19.0 (#50)

Also OpenEXR upgrade 2.5.9

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Co-authored-by: Fabian Velasquez <143654720+fvelasquezr@...>

Updated Bistro scene texture names and added missing bump maps

Follow up fixes for Mac and Linux after fixing G3D for Macs (#16)

- added None option to build native ffmpeg function for Linux builds
- defined HAVE_UNISTD_H for zip.lib mac builds
- Added linker flag to force old linker for Apple Clang 15

Fixes G3D on MacOS (#11)

This PR fixes a bunch of issues that G3D had running on MacOS:
1. Upgraded zlib to run with OSX Ventura
2. fixed include issue in prompt_cocoa.mm
3. changed policy for 'includes' in external libs to avoid a filename collision in enet ("enet/time.h" was colliding with <time.h>)
4. hacked the tbb makefile for MacOS to build universal libtbb binaries
5. reconfigured the native ffmpeg build steps on Mac to build arm64 and x86_64 builds automatically and lipo the libs together to form universal binaries