Function AcquirePoseMatrixCacheEntry

engine/rig/src/rig.cpp:1430–1456

These should typically not be stored across multiple frames, since dispatch order might differ.

    // These should typically not be stored across multiple frames, since dispatch order might differ.
    HCachePoseMatrixEntry AcquirePoseMatrixCacheEntry(HRigContext context, HRigInstance instance)
    {
        if (instance == 0)
        {
            return INVALID_POSE_MATRIX_CACHE_ENTRY;
        }
        else if (instance->m_PoseMatrixCacheIndex != INVALID_POSE_MATRIX_CACHE_ENTRY)
        {
            return instance->m_PoseMatrixCacheIndex;
        }

        PoseMatrixCache* cache = &context->m_PoseMatrixCache;

        uint16_t next_index = cache->m_CacheEntryOffsets.Size();
        if (cache->m_CacheEntryOffsets.Full())
        {
            cache->m_CacheEntryOffsets.OffsetCapacity(32);
        }

        cache->m_CacheEntryOffsets.SetSize(next_index + 1);

        instance->m_PoseMatrixCacheIndex = next_index;

        cache->m_CacheEntryOffsets[next_index] = cache->m_TotalPoseCount;
        cache->m_TotalPoseCount += instance->m_BindPose->Size();
        return next_index;
    }

    uint32_t GetPoseMatrixCacheDataOffset(HRigContext context, HRigInstance instance)
    {