#jira UE-122078
#rb Andrew.Davidson, Colin.McGinley
#preflight standard build
#ROBOMERGE-AUTHOR: fred.kimberley
#ROBOMERGE-SOURCE: CL 18817999 in //UE5/Release-5.0/... via CL 18818012 via CL 18822871
#ROBOMERGE-BOT: UE5 (Release-Engine-Test -> Main) (v910-18824042)
[CL 18824721 by fred kimberley in ue5-main branch]
Submitted on behalf of fred.kimberley
#rb andy.davidson
#preflight 61f8719ea6632a34f35e654b
#ROBOMERGE-AUTHOR: andrew.davidson
#ROBOMERGE-SOURCE: CL 18801709 in //UE5/Release-5.0/... via CL 18802160 via CL 18821533
#ROBOMERGE-BOT: UE5 (Release-Engine-Test -> Main) (v908-18788545)
[CL 18821619 by andrew davidson in ue5-main branch]
- Removed hardcoded element type arrays (Vertices, Edges, Triangles etc.). Mesh element types can now be arbitrarily added, with any number of channels.
- Mesh element containers have a much leaner format; instead of sparse arrays, they are now represented by a simple bitarray, determining whether an index is used or not. Consequently, mesh topology is now entirely described with the attribute system, e.g. edge start and end vertices, triangle vertices, etc.
- Support added for attributes of arbitrary dimensions, e.g. float[4] or int[2].
- Support added for attributes which index into another mesh element container.
- Added FMeshElementIndexer: this is an efficient container for maintaining backward references from one element type to another; for example, edges have an attribute specifying which vertices are at each end (an attribute of type FVertexID[2]). With an indexer, it is possible to look up which edges contain a given vertex, even though this is not explicitly stored. Indexers are designed to do minimal allocations and update lazily and in batch when necessary.
- Added support for preserving UV topology in static meshes. UVs are now a first-class element type which may be indexed directly from triangles.
- Added the facility to access the underlying array in an attribute array directly.
- Triangles now directly reference their vertex, edge and UV IDs. Vertex instances are to be deprecated.
- Changed various systems to be triangle-centric rather than polygon-centric, as this is faster. Triangles are presumed to be the elementary face type in a MeshDescription, even if polygons are still supported. The concept of polygons will be somewhat shifted to mean a group of triangles which should be treated collectively for editing purposes.
- Optimised normal/tangent generation and FBX import.
- Deprecated EditableMesh, MeshEditor and StaticMeshEditorExtension plugins - these are to be removed, but they still have certain hooks in place which need removing.
#rb
[CL 13568702 by Richard TalbotWatkin in ue5-main branch]
#jira UE-88603
#rb jeanmichel.dignard
#ROBOMERGE-SOURCE: CL 12821338 in //UE4/Release-4.25/... via CL 12821346 via CL 12821397
#ROBOMERGE-BOT: RELEASE (Release-Engine-Staging -> Main) (v681-12776863)
[CL 12821432 by alexis matte in Main branch]
#rnx
#rb none
#ROBOMERGE-SOURCE: CL 10869241 via CL 10869527 via CL 10869904
#ROBOMERGE-BOT: (v613-10869866)
[CL 10870586 by ryan durand in Main branch]
Replicated from CL# 7924370.
#rb none
#ROBOMERGE-OWNER: steve.robb
#ROBOMERGE-AUTHOR: steve.robb
#ROBOMERGE-SOURCE: CL 9279060 via CL 9279063
#ROBOMERGE-BOT: (v443-9013191)
[CL 9279836 by steve robb in Main branch]
Provided a path for building MeshDescriptions for static meshes at runtime, and supporting API.
Clarified use of attributes for static meshes; now some attributes may be considered optional.
Added FStaticMeshAttributes, used for fetching and registering all the attributes required by a static mesh.
Added Blueprint interface for building meshes.
Deprecated a number of existing APIs:
- FMeshDescription methods which referred explicitly to static mesh specific attributes
- StaticMesh attribute registration has been moved to FStaticMeshAttributes
#rb none
[CL 9123037 by Richard TalbotWatkin in Dev-Editor branch]
Added new accessors for getting individual SourceModels, or the entire array.
#rb none
#jira none
#ROBOMERGE-SOURCE: CL 7668562 in //UE4/Release-4.23/...
#ROBOMERGE-BOT: RELEASE (Release-4.23 -> Main) (v372-7473910)
[CL 7668565 by richard talbotwatkin in Main branch]
