Show weights + skin modfier cause crashing #57283

New Issue

Marián Kosa · 2018-10-17T13:53:31+02:00

Marián Kosa commented

2018-10-17 13:53:31 +02:00

System Information
Win10 64b , 8GB RAM, GTX 750 Ti

Blender Version
Broken: f4dc9f9d68, b618c185cb, 41ad845531 (basically everywhere from official to newest versions)
Worked: maybe never? did by accident

Short description of error
After activating "show weights" in edit mode blender crashes. In 2,8 it crash (sometimes) when i activate and than deactivate "vertex group weight" in overlays. (Same function?)

Exact steps for others to reproduce the error
bug.blend

one bug.blend file (mesh in edit mode with skin modifier)
in "N" panel/mesh display click on "Show Weights"
crash

**System Information** Win10 64b , 8GB RAM, GTX 750 Ti **Blender Version** Broken: f4dc9f9d68b, b618c185cb7, 41ad845531b (basically everywhere from official to newest versions) Worked: maybe never? did by accident **Short description of error** After activating "show weights" in edit mode blender crashes. In 2,8 it crash (sometimes) when i activate and than deactivate "vertex group weight" in overlays. (Same function?) **Exact steps for others to reproduce the error** [bug.blend](https://archive.blender.org/developer/F5108323/bug.blend) - one bug.blend file (mesh in edit mode with skin modifier) - in "N" panel/mesh display click on "Show Weights" - crash

Marián Kosa commented

2018-10-17 13:53:31 +02:00

Added subscriber: @MarianKosa

Philipp Oeser commented

2018-10-17 15:23:29 +02:00

Added subscriber: @lichtwerk

Philipp Oeser self-assigned this 2018-10-17 15:23:29 +02:00

Philipp Oeser commented

2018-10-17 15:23:29 +02:00

Confirmed (in both 2.79 and 2.8), will have a look...

Campbell Barton commented

2018-10-23 06:24:19 +02:00

Added subscriber: @ideasman42

Campbell Barton commented

2018-10-23 06:24:19 +02:00

Edit: not-fixed

Campbell Barton commented

2018-10-23 06:24:32 +02:00

Changed status from 'Open' to: 'Resolved'

Campbell Barton closed this issue

2018-10-23 06:24:32 +02:00

Campbell Barton commented

2018-10-23 06:29:27 +02:00

Changed status from 'Resolved' to: 'Open'

Campbell Barton reopened this issue

2018-10-23 06:29:27 +02:00

Philipp Oeser commented

2018-10-23 15:48:49 +02:00

couple of notes:

asserts here (2.8 specific):

assert(verts->vertex_len == batch->verts- [x]->vertex_len)
verts->vertex_len is some dependent on how the skin is constructed [edge lenght etc] [468 in the file reported]
batch->verts- [x]->vertex_len is 0

1  raise                                                                                   0x7ffff1c93eab 
2  abort                                                                                   0x7ffff1c7e5b9 
3  __assert_fail_base.cold.0                                                               0x7ffff1c7e491 
4  __assert_fail                                                                           0x7ffff1c8c612 
5  GPU_batch_vertbuf_add_ex                                    gpu_batch.c            193  0x25ce62b      
6  DRW_mesh_batch_cache_get_triangles_with_normals_and_weights draw_cache_impl_mesh.c 4734 0x2619682      
7  DRW_cache_mesh_surface_weights_get                          draw_cache.c           3093 0x268be70      
8  EDIT_MESH_cache_populate                                    edit_mesh_mode.c       636  0x2636cf1      
9  drw_engines_cache_populate                                  draw_manager.c         979  0x2624a27      
10 DRW_draw_render_loop_ex                                     draw_manager.c         1469 0x2625c02      
11 DRW_draw_view                                               draw_manager.c         1406 0x26258c5     
12 view3d_draw_view                                            view3d_draw.c          1259 0x1b41789

need to check where this fails in 2.7 master still...

also note that I'm hitting the assert in 2.8 in other situations as well:

add subdivision modifier to default cube
go to editmode
"vertex group weight" overlay --> assert

(one can get around the assert by first disabling "show_in_editmode" on the modifier, enabling that option again wont assert anymore)
(blender then displays the weights on the original [unsubdivided] mesh though, 2.7 didnt do that)

weightpainting itself can show weights on subdivision modifiers just fine (painting is somewht broken then, but that's already reported in #56669)

will do some further investigating based on all the above

couple of notes: ----------------------------- asserts here (2.8 specific): `assert(verts->vertex_len == batch->verts- [x]->vertex_len)` verts->vertex_len is some dependent on how the skin is constructed [edge lenght etc] [468 in the file reported] batch->verts- [x]->vertex_len is 0 ``` 1 raise 0x7ffff1c93eab 2 abort 0x7ffff1c7e5b9 3 __assert_fail_base.cold.0 0x7ffff1c7e491 4 __assert_fail 0x7ffff1c8c612 5 GPU_batch_vertbuf_add_ex gpu_batch.c 193 0x25ce62b 6 DRW_mesh_batch_cache_get_triangles_with_normals_and_weights draw_cache_impl_mesh.c 4734 0x2619682 7 DRW_cache_mesh_surface_weights_get draw_cache.c 3093 0x268be70 8 EDIT_MESH_cache_populate edit_mesh_mode.c 636 0x2636cf1 9 drw_engines_cache_populate draw_manager.c 979 0x2624a27 10 DRW_draw_render_loop_ex draw_manager.c 1469 0x2625c02 11 DRW_draw_view draw_manager.c 1406 0x26258c5 12 view3d_draw_view view3d_draw.c 1259 0x1b41789 ``` ----------------------------- need to check where this fails in 2.7 master still... ----------------------------- also note that I'm hitting the assert in 2.8 in other situations as well: - add subdivision modifier to default cube - go to editmode - "vertex group weight" overlay --> assert (one can get around the assert by **first** disabling "show_in_editmode" on the modifier, enabling that option again wont assert anymore) (blender then displays the weights on the original [unsubdivided] mesh though, 2.7 didnt do that) weightpainting itself can show weights on subdivision modifiers just fine (painting is somewht broken then, but that's already reported in #56669) ----------------------------- will do some further investigating based on all the above

Philipp Oeser commented

2018-10-24 14:48:02 +02:00

This will actually be solved by addressing #57371, so no need to keep this as a separate report...

Philipp Oeser commented

2018-10-24 14:48:20 +02:00

Closed as duplicate of #57371

Philipp Oeser closed this issue

2018-10-24 14:48:20 +02:00

Sign in to join this conversation.

No Label

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

Show weights + skin modfier cause crashing #57283

couple of notes:

need to check where this fails in 2.7 master still...

weightpainting itself can show weights on subdivision modifiers just fine (painting is somewht broken then, but that's already reported in #56669)