Dyntopo Claystrips crashes on certain meshes #46692

New Issue

lauri järvenpää · 2015-11-04T12:53:00+01:00

2015-11-04 12:53:00 +01:00

System Information
MacBook Pro (Retina, 15-inch, Mid 2014)
OSX El Capitan 10.11.1 (15B42)
NVIDIA GeForce GT 750M 2048 MB
Wacom Intuos

Blender Version
Broken: 2.76 48f7dd6

Short description of error
Blender crashes always either instantly or anyway very quickly during Dyntopo sculpting when using clay strips to eat away the thin mesh edge. Clay strips is set to accumulate and has auto-strength disabled. Brush detail is on.

Exact steps for others to reproduce the error
crashtest.blend

enable dyntopo (brush detail)
select claystrips and try to eat away the edge of the mesh (with control-draw)

Crash

Blender 2.76 (sub 0), Commit date: 2015-10-11 06:55, Hash `48f7dd6`

bpy.ops.sculpt.sculptmode_toggle() # Operator
bpy.ops.sculpt.dynamic_topology_toggle() # Operator
bpy.ops.wm.radial_control(data_path_primary="tool_settings.sculpt.brush.size", data_path_secondary="tool_settings.unified_paint_settings.size", use_secondary="tool_settings.unified_paint_settings.use_unified_size", rotation_path="tool_settings.sculpt.brush.texture_slot.angle", color_path="tool_settings.sculpt.brush.cursor_color_add", fill_color_path="", zoom_path="", image_id="tool_settings.sculpt.brush", secondary_tex=False) # Operator
bpy.ops.wm.radial_control(data_path_primary="tool_settings.sculpt.brush.size", data_path_secondary="tool_settings.unified_paint_settings.size", use_secondary="tool_settings.unified_paint_settings.use_unified_size", rotation_path="tool_settings.sculpt.brush.texture_slot.angle", color_path="tool_settings.sculpt.brush.cursor_color_add", fill_color_path="", zoom_path="", image_id="tool_settings.sculpt.brush", secondary_tex=False) # Operator
bpy.ops.wm.radial_control(data_path_primary="tool_settings.sculpt.brush.size", data_path_secondary="tool_settings.unified_paint_settings.size", use_secondary="tool_settings.unified_paint_settings.use_unified_size", rotation_path="tool_settings.sculpt.brush.texture_slot.angle", color_path="tool_settings.sculpt.brush.cursor_color_add", fill_color_path="", zoom_path="", image_id="tool_settings.sculpt.brush", secondary_tex=False) # Operator
bpy.ops.wm.radial_control(data_path_primary="tool_settings.sculpt.brush.size", data_path_secondary="tool_settings.unified_paint_settings.size", use_secondary="tool_settings.unified_paint_settings.use_unified_size", rotation_path="tool_settings.sculpt.brush.texture_slot.angle", color_path="tool_settings.sculpt.brush.cursor_color_add", fill_color_path="", zoom_path="", image_id="tool_settings.sculpt.brush", secondary_tex=False) # Operator

backtrace

0 blender 0x0000000100c9f7da BLI_system_backtrace + 58
1 blender 0x000000010017a79b blender_crash_handler_backtrace + 43
2 blender 0x000000010017a253 blender_crash_handler + 659
3 libsystem_platform.dylib 0x00007fff995da52a _sigtramp + 26
4 ??? 0x0000000115606710 0x0 + 4653606672
5 blender 0x000000010092b339 long_edge_queue_face_add + 233
6 blender 0x0000000100929f2c BKE_pbvh_bmesh_update_topology + 3404
7 blender 0x000000010035ea54 sculpt_topology_update + 388
8 blender 0x00000001003766da do_tiled + 410
9 blender 0x000000010035e6e3 do_symmetrical_brush_actions + 1427
10 blender 0x000000010035cf6a sculpt_stroke_update_step + 2394
11 blender 0x000000010034f250 paint_brush_stroke_add_step + 2512
12 blender 0x000000010034e815 paint_space_stroke + 1333
13 blender 0x000000010034dc88 paint_stroke_modal + 4936
14 blender 0x0000000100186851 wm_handler_operator_call + 593
15 blender 0x00000001001862cb wm_handlers_do_intern + 1435
16 blender 0x0000000100183229 wm_handlers_do + 25
17 blender 0x000000010018273a wm_event_do_handlers + 890
18 blender 0x000000010017d6e0 WM_main + 32
19 blender 0x00000001001790a7 main + 1591
20 blender 0x0000000100001d34 start + 52
21 ??? 0x0000000000000001 0x0 + 1

**System Information** MacBook Pro (Retina, 15-inch, Mid 2014) OSX El Capitan 10.11.1 (15B42) NVIDIA GeForce GT 750M 2048 MB Wacom Intuos **Blender Version** Broken: 2.76 48f7dd6 **Short description of error** Blender crashes always either instantly or anyway very quickly during Dyntopo sculpting when using clay strips to eat away the thin mesh edge. Clay strips is set to accumulate and has auto-strength disabled. Brush detail is on. **Exact steps for others to reproduce the error** [crashtest.blend](https://archive.blender.org/developer/F251495/crashtest.blend) - enable dyntopo (brush detail) - select claystrips and try to eat away the edge of the mesh (with control-draw) **Crash** # Blender 2.76 (sub 0), Commit date: 2015-10-11 06:55, Hash 48f7dd6 bpy.ops.sculpt.sculptmode_toggle() # Operator bpy.ops.sculpt.dynamic_topology_toggle() # Operator bpy.ops.wm.radial_control(data_path_primary="tool_settings.sculpt.brush.size", data_path_secondary="tool_settings.unified_paint_settings.size", use_secondary="tool_settings.unified_paint_settings.use_unified_size", rotation_path="tool_settings.sculpt.brush.texture_slot.angle", color_path="tool_settings.sculpt.brush.cursor_color_add", fill_color_path="", zoom_path="", image_id="tool_settings.sculpt.brush", secondary_tex=False) # Operator bpy.ops.wm.radial_control(data_path_primary="tool_settings.sculpt.brush.size", data_path_secondary="tool_settings.unified_paint_settings.size", use_secondary="tool_settings.unified_paint_settings.use_unified_size", rotation_path="tool_settings.sculpt.brush.texture_slot.angle", color_path="tool_settings.sculpt.brush.cursor_color_add", fill_color_path="", zoom_path="", image_id="tool_settings.sculpt.brush", secondary_tex=False) # Operator bpy.ops.wm.radial_control(data_path_primary="tool_settings.sculpt.brush.size", data_path_secondary="tool_settings.unified_paint_settings.size", use_secondary="tool_settings.unified_paint_settings.use_unified_size", rotation_path="tool_settings.sculpt.brush.texture_slot.angle", color_path="tool_settings.sculpt.brush.cursor_color_add", fill_color_path="", zoom_path="", image_id="tool_settings.sculpt.brush", secondary_tex=False) # Operator bpy.ops.wm.radial_control(data_path_primary="tool_settings.sculpt.brush.size", data_path_secondary="tool_settings.unified_paint_settings.size", use_secondary="tool_settings.unified_paint_settings.use_unified_size", rotation_path="tool_settings.sculpt.brush.texture_slot.angle", color_path="tool_settings.sculpt.brush.cursor_color_add", fill_color_path="", zoom_path="", image_id="tool_settings.sculpt.brush", secondary_tex=False) # Operator # backtrace 0 blender 0x0000000100c9f7da BLI_system_backtrace + 58 1 blender 0x000000010017a79b blender_crash_handler_backtrace + 43 2 blender 0x000000010017a253 blender_crash_handler + 659 3 libsystem_platform.dylib 0x00007fff995da52a _sigtramp + 26 4 ??? 0x0000000115606710 0x0 + 4653606672 5 blender 0x000000010092b339 long_edge_queue_face_add + 233 6 blender 0x0000000100929f2c BKE_pbvh_bmesh_update_topology + 3404 7 blender 0x000000010035ea54 sculpt_topology_update + 388 8 blender 0x00000001003766da do_tiled + 410 9 blender 0x000000010035e6e3 do_symmetrical_brush_actions + 1427 10 blender 0x000000010035cf6a sculpt_stroke_update_step + 2394 11 blender 0x000000010034f250 paint_brush_stroke_add_step + 2512 12 blender 0x000000010034e815 paint_space_stroke + 1333 13 blender 0x000000010034dc88 paint_stroke_modal + 4936 14 blender 0x0000000100186851 wm_handler_operator_call + 593 15 blender 0x00000001001862cb wm_handlers_do_intern + 1435 16 blender 0x0000000100183229 wm_handlers_do + 25 17 blender 0x000000010018273a wm_event_do_handlers + 890 18 blender 0x000000010017d6e0 WM_main + 32 19 blender 0x00000001001790a7 main + 1591 20 blender 0x0000000100001d34 start + 52 21 ??? 0x0000000000000001 0x0 + 1

lauri järvenpää commented

2015-11-04 12:53:00 +01:00

Changed status to: 'Open'

lauri järvenpää commented

2015-11-04 12:53:00 +01:00

Added subscriber: @hevonen

lauri järvenpää commented

2015-11-04 13:00:12 +01:00

Same crash happens with clay tool also. Something around the front edge of that mesh causes dyntopo to die.

lauri järvenpää commented

2015-11-04 14:00:42 +01:00

More:
Dyntopo creates non-manifold vertices when it converts quads to tris. Triangulating the mesh manually with "beauty" -option before entering dyntopo doesn't generate non-manifold vertices and prevents the crash.

Triangulating the mesh manually with "fixed" -option creates the same non-manifold mesh as dyntopo does when it is enabled. Blender crashes when dyntopo sculpt brush touches this non-manifold area.

Obvious fix would be to either fix the triangulation method or set Dyntopo to use beauty triangulation instead.

More: Dyntopo creates non-manifold vertices when it converts quads to tris. Triangulating the mesh manually with "beauty" -option before entering dyntopo doesn't generate non-manifold vertices and prevents the crash. Triangulating the mesh manually with "fixed" -option creates the same non-manifold mesh as dyntopo does when it is enabled. Blender crashes when dyntopo sculpt brush touches this non-manifold area. Obvious fix would be to either fix the triangulation method or set Dyntopo to use beauty triangulation instead.

Campbell Barton self-assigned this 2015-11-04 18:25:21 +01:00

Campbell Barton changed title from ~~Dyntopo Claystrips instacrash on OSX~~ to Dyntopo Claystrips crashes with on certain meshes

2015-11-04 18:25:41 +01:00

Campbell Barton changed title from ~~Dyntopo Claystrips crashes with on certain meshes~~ to Dyntopo Claystrips crashes on certain meshes

2015-11-04 18:25:53 +01:00

blender-admin commented

2015-11-05 15:13:23 +01:00

This issue was referenced by 0f769afe07

This issue was referenced by 0f769afe07f96efa7ec6325453c4f04ea391f112

Campbell Barton commented

2015-11-05 15:22:16 +01:00

Changed status from 'Open' to: 'Resolved'

Campbell Barton closed this issue

2015-11-05 15:22:16 +01:00

Campbell Barton commented

2015-11-05 15:23:41 +01:00

Also use beauty triangulate, 131c2a2bef

Also use beauty triangulate, 131c2a2bef

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Dyntopo Claystrips crashes on certain meshes #46692

Blender 2.76 (sub 0), Commit date: 2015-10-11 06:55, Hash 48f7dd6

backtrace

Blender 2.76 (sub 0), Commit date: 2015-10-11 06:55, Hash `48f7dd6`