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author | Hans Goudey <h.goudey@me.com> | 2022-08-11 19:54:24 +0300 |
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committer | Hans Goudey <h.goudey@me.com> | 2022-08-11 19:59:06 +0300 |
commit | 2480b55f216c31373a84bc5c5d2b0cc158497c44 (patch) | |
tree | 3de24d411a604dfa3a6cfe22796b1fbc8f6be9da /source/blender/blenkernel/intern/subdiv_converter_mesh.c | |
parent | 5cbfdaccd0af7537f2e5c4c777d3edae1ce4645a (diff) |
Mesh: Move hide flags to generic attributes
This commit moves the hide status of mesh vertices, edges, and faces
from the `ME_FLAG` to optional generic boolean attributes. Storing this
data as generic attributes can significantly simplify and improve code,
as described in T95965.
The attributes are called `.hide_vert`, `.hide_edge`, and `.hide_poly`,
using the attribute name semantics discussed in T97452. The `.` prefix
means they are "UI attributes", so they still contain original data
edited by users, but they aren't meant to be accessed procedurally by
the user in arbitrary situations. They are also be hidden in the
spreadsheet and the attribute list by default,
Until 4.0, the attributes are still written to and read from the mesh
in the old way, so neither forward nor backward compatibility are
affected. This means memory requirements will be increased by one byte
per element when the hide status is used. When the flags are removed
completely, requirements will decrease when hiding is unused.
Further notes:
* Some code can be further simplified to skip some processing when the
hide attributes don't exist.
* The data is still stored in flags for `BMesh`, necessitating some
complexity in the conversion to and from `Mesh`.
* Access to the "hide" property of mesh elements in RNA is slower.
The separate boolean arrays should be used where possible.
Ref T95965
Differential Revision: https://developer.blender.org/D14685
Diffstat (limited to 'source/blender/blenkernel/intern/subdiv_converter_mesh.c')
-rw-r--r-- | source/blender/blenkernel/intern/subdiv_converter_mesh.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/source/blender/blenkernel/intern/subdiv_converter_mesh.c b/source/blender/blenkernel/intern/subdiv_converter_mesh.c index 12a5f00a68b..9c6d507d42c 100644 --- a/source/blender/blenkernel/intern/subdiv_converter_mesh.c +++ b/source/blender/blenkernel/intern/subdiv_converter_mesh.c @@ -205,7 +205,15 @@ static void precalc_uv_layer(const OpenSubdiv_Converter *converter, const int la mesh->totloop, sizeof(int), "loop uv vertex index"); } UvVertMap *uv_vert_map = BKE_mesh_uv_vert_map_create( - mpoly, mloop, mloopuv, num_poly, num_vert, limit, false, true); + mpoly, + (const bool *)CustomData_get_layer_named(&mesh->pdata, CD_PROP_BOOL, ".hide_poly"), + mloop, + mloopuv, + num_poly, + num_vert, + limit, + false, + true); /* NOTE: First UV vertex is supposed to be always marked as separate. */ storage->num_uv_coordinates = -1; for (int vertex_index = 0; vertex_index < num_vert; vertex_index++) { |