diff options
author | Hans Goudey <h.goudey@me.com> | 2022-09-05 19:56:34 +0300 |
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committer | Hans Goudey <h.goudey@me.com> | 2022-09-05 19:56:34 +0300 |
commit | 05952aa94d33eeb504fa63618ba35c2bcc8bd19b (patch) | |
tree | c9ec37adf20c3c37ccaab44869220dcbe8e987a3 /source/blender/bmesh | |
parent | 63cfc8f9f6d623f33b50c5c07976af2b22845713 (diff) |
Mesh: Remove redundant custom data pointers
For copy-on-write, we want to share attribute arrays between meshes
where possible. Mutable pointers like `Mesh.mvert` make that difficult
by making ownership vague. They also make code more complex by adding
redundancy.
The simplest solution is just removing them and retrieving layers from
`CustomData` as needed. Similar changes have already been applied to
curves and point clouds (e9f82d3dc7ee, 410a6efb747f). Removing use of
the pointers generally makes code more obvious and more reusable.
Mesh data is now accessed with a C++ API (`Mesh::edges()` or
`Mesh::edges_for_write()`), and a C API (`BKE_mesh_edges(mesh)`).
The CoW changes this commit makes possible are described in T95845
and T95842, and started in D14139 and D14140. The change also simplifies
the ongoing mesh struct-of-array refactors from T95965.
**RNA/Python Access Performance**
Theoretically, accessing mesh elements with the RNA API may become
slower, since the layer needs to be found on every random access.
However, overhead is already high enough that this doesn't make a
noticible differenc, and performance is actually improved in some
cases. Random access can be up to 10% faster, but other situations
might be a bit slower. Generally using `foreach_get/set` are the best
way to improve performance. See the differential revision for more
discussion about Python performance.
Cycles has been updated to use raw pointers and the internal Blender
mesh types, mostly because there is no sense in having this overhead
when it's already compiled with Blender. In my tests this roughly
halves the Cycles mesh creation time (0.19s to 0.10s for a 1 million
face grid).
Differential Revision: https://developer.blender.org/D15488
Diffstat (limited to 'source/blender/bmesh')
-rw-r--r-- | source/blender/bmesh/intern/bmesh_mesh_convert.cc | 26 |
1 files changed, 10 insertions, 16 deletions
diff --git a/source/blender/bmesh/intern/bmesh_mesh_convert.cc b/source/blender/bmesh/intern/bmesh_mesh_convert.cc index cd5e6f117ae..0190f91250b 100644 --- a/source/blender/bmesh/intern/bmesh_mesh_convert.cc +++ b/source/blender/bmesh/intern/bmesh_mesh_convert.cc @@ -366,7 +366,7 @@ void BM_mesh_bm_from_me(BMesh *bm, const Mesh *me, const struct BMeshFromMeshPar const int *material_indices = (const int *)CustomData_get_layer_named( &me->pdata, CD_PROP_INT32, "material_index"); - Span<MVert> mvert{me->mvert, me->totvert}; + Span<MVert> mvert = me->vertices(); Array<BMVert *> vtable(me->totvert); for (const int i : mvert.index_range()) { BMVert *v = vtable[i] = BM_vert_create( @@ -412,7 +412,7 @@ void BM_mesh_bm_from_me(BMesh *bm, const Mesh *me, const struct BMeshFromMeshPar bm->elem_index_dirty &= ~BM_VERT; /* Added in order, clear dirty flag. */ } - Span<MEdge> medge{me->medge, me->totedge}; + const Span<MEdge> medge = me->edges(); Array<BMEdge *> etable(me->totedge); for (const int i : medge.index_range()) { BMEdge *e = etable[i] = BM_edge_create( @@ -444,8 +444,8 @@ void BM_mesh_bm_from_me(BMesh *bm, const Mesh *me, const struct BMeshFromMeshPar bm->elem_index_dirty &= ~BM_EDGE; /* Added in order, clear dirty flag. */ } - Span<MPoly> mpoly{me->mpoly, me->totpoly}; - Span<MLoop> mloop{me->mloop, me->totloop}; + const Span<MPoly> mpoly = me->polygons(); + const Span<MLoop> mloop = me->loops(); /* Only needed for selection. */ @@ -1049,9 +1049,6 @@ void BM_mesh_bm_to_me(Main *bmain, BMesh *bm, Mesh *me, const struct BMeshToMesh me->cd_flag = BM_mesh_cd_flag_from_bmesh(bm); - /* This is called again, 'dotess' arg is used there. */ - BKE_mesh_update_customdata_pointers(me, false); - i = 0; BM_ITER_MESH (v, &iter, bm, BM_VERTS_OF_MESH) { copy_v3_v3(mvert->co, v->co); @@ -1226,8 +1223,6 @@ void BM_mesh_bm_to_me(Main *bmain, BMesh *bm, Mesh *me, const struct BMeshToMesh convert_bmesh_hide_flags_to_mesh_attributes( *bm, need_hide_vert, need_hide_edge, need_hide_poly, *me); - BKE_mesh_update_customdata_pointers(me, false); - { me->totselect = BLI_listbase_count(&(bm->selected)); @@ -1253,7 +1248,7 @@ void BM_mesh_bm_to_me(Main *bmain, BMesh *bm, Mesh *me, const struct BMeshToMesh } if (me->key) { - bm_to_mesh_shape(bm, me->key, me->mvert, params->active_shapekey_to_mvert); + bm_to_mesh_shape(bm, me->key, mvert, params->active_shapekey_to_mvert); } /* Run this even when shape keys aren't used since it may be used for hooks or vertex parents. */ @@ -1303,16 +1298,15 @@ void BM_mesh_bm_to_me_for_eval(BMesh *bm, Mesh *me, const CustomData_MeshMasks * CustomData_merge(&bm->ldata, &me->ldata, mask.lmask, CD_SET_DEFAULT, me->totloop); CustomData_merge(&bm->pdata, &me->pdata, mask.pmask, CD_SET_DEFAULT, me->totpoly); - BKE_mesh_update_customdata_pointers(me, false); - BMIter iter; BMVert *eve; BMEdge *eed; BMFace *efa; - MVert *mvert = me->mvert; - MEdge *medge = me->medge; - MLoop *mloop = me->mloop; - MPoly *mpoly = me->mpoly; + MutableSpan<MVert> mvert = me->vertices_for_write(); + MutableSpan<MEdge> medge = me->edges_for_write(); + MutableSpan<MPoly> mpoly = me->polygons_for_write(); + MutableSpan<MLoop> loops = me->loops_for_write(); + MLoop *mloop = loops.data(); unsigned int i, j; const int cd_vert_bweight_offset = CustomData_get_offset(&bm->vdata, CD_BWEIGHT); |