* Introduce AssetPipeline for performing glTF manipulations.
AssetPipeline offers a place for doing things like scene flattening,
transform baking, and optimization of glTF assets. These types of scene
manipulations will allow us to tackle lightmap baking in the upcoming
atlasgen tool.
This initial PR includes support for scene flattening, which is fairly
non-trivial. Support for parameterization via xatlas will be added in a
subsequent PR.
In a glTF asset, a single mesh can be referenced by several nodes, and
each reference can have a unique transform. AssetPipeline can flatten
the asset such that each instanced mesh has its own vertex data, and the
node transform gets baked into the vertex data.
Recall that gltfio is composed of two libraries: the core library (no
filamat) and the full library. This adds to the size of the full library
but leaves the core library as is.
* Fix various Windows build issues.
This is our first ImGui extension, it draws a draggable 3D arrow for
manipulating a unit vector. This is especially useful for tweaking the
light direction.
* Try to clean up asset folders for sample apps.
This removes the build step where we copy a subset of assets, and makes
it so that FilamentApp hands out a "root path" for assets. For now this
is determined based on the location of the executable. This allows
developers to launch samples from any CWD.
Closes#11
* Restore asset copy to build.
Philip Rideout
Adrian Perez
Romain Guy