This commit adds two classes:
* ProgressTracker
* ProgressScope
The first is for users to implement, and to instantiate when they desire
to get informed about the overall progress.
The second is to be added to all functions that may take a considerable
amount of time, such that they can report back how far along they are.
These are much more convenient to use than the existing ProgressHandler.
ProgressScope is designed such that it only requires "local knowledge"
about upcoming and finished work. Scopes are nested and combined to
form the final global progress.
The active ProgressTracker is stored in a thread_local pointer.
This is a consicius decision since in assimp there is often no 'context'
passed through. The ProgressTracker may be needed anywhere, and it would
be tedious and a huge change to pass it through to every function.
Therefore, using a thread_local variable makes it accessible everywhere,
without a major interface change. Since assimmp is single-threaded,
but may be run in parallel on multiple threads, a thread_local is a
good trade-off, in my opinion.
This change only adds few uses of ProgressScope, to generally show how
it would be used. Also for our use cases these where the most pressing
places to add progress reporting, so this already covers loading from FBX
files pretty well.
This post process step introduced new attributes into `aiSkeletonBone`. Said attributes are only defined with the process enabled, i.e. when the `ASSIMP_BUILD_NO_ARMATUREPOPULATE_PROCESS` macro has not been defined.
Some code, however, accessed the variables unconditionally, leading to build failures if `ASSIMP_BUILD_NO_ARMATUREPOPULATE_PROCESS` was defined.
This commit adds the missing checks.
I had an import file that caused an infinite loop. I don't exactly know how this algorithm works here but maybe we should change it more.
Probably calculate the amount of steps and chop linear.
FBX uses euler rotation but assimp library's base type is
quaternion. When assimp convert FBX some animation information
can be lost.
This patch interpolates euler-angle rotations and insert
additional keyframes for the FBX format.
Move new mTextureCoordsNames member to end of struct
Convert to pointer-to-array, saving ~8KB per aiMesh in almost all cases
Add C++ accessor functions for simpler usage