LineArt: Missing intersection lines #100138

New Issue

Chris Clyne (Lateasusual) · 2022-08-02T12:41:33+02:00

2022-08-02 12:41:33 +02:00

Blender Version
Broken: Broken by commit 432c4c74eb

Short description of error
Moving two intersecting meshes causes intersection lines to be cut short at random or missing from certain edges.

Exact steps for others to reproduce the error
From startup scene, add a Scene LineArt object. Duplicate the default cube and rotate so the two cubes intersect, and observe intense flickering of intersecting lines.

lineart_intersection_issue.blend

**Blender Version** Broken: Broken by commit 432c4c74ebe6f66b83e06ff7fca70c96d0526d6a **Short description of error** Moving two intersecting meshes causes intersection lines to be cut short at random or missing from certain edges. **Exact steps for others to reproduce the error** From startup scene, add a Scene LineArt object. Duplicate the default cube and rotate so the two cubes intersect, and observe intense flickering of intersecting lines. ![image.png](https://archive.blender.org/developer/F13331157/image.png) [lineart_intersection_issue.blend](https://archive.blender.org/developer/F13331159/lineart_intersection_issue.blend)

Chris Clyne (Lateasusual) commented

2022-08-02 12:41:33 +02:00

Added subscriber: @lateasusual

Pratik Borhade commented

2022-08-02 13:12:57 +02:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2022-08-02 13:15:59 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'

Pratik Borhade commented

2022-08-02 13:15:59 +02:00

Added subscriber: @ChengduLittleA

Pratik Borhade commented

2022-08-02 13:15:59 +02:00

cc @ChengduLittleA

Sebastian Parborg commented

2022-08-02 19:08:04 +02:00

Added subscriber: @ZedDB

Sebastian Parborg commented

2022-08-02 19:08:04 +02:00

I'm getting an ASAN heap overflow error. So I'm guessing that this might be a memory related issue:

==14506==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x6020000e3f38 at pc 0x7fae2b1eee37 bp 0x7fff33c6af90 sp 0x7fff33c6a738
READ of size 8000 at 0x6020000e3f38 thread T0
    - 0 0x7fae2b1eee36 in __interceptor_memcpy (/usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/libasan.so.6+0x39e36)
    - 1 0xcb165c1 in lineart_add_edge_to_array /home/zed/prog/blender/source/blender/gpencil_modifiers/intern/lineart/lineart_cpu.c:1785
    - 2 0xcb6a060 in lineart_create_edges_from_isec_data /home/zed/prog/blender/source/blender/gpencil_modifiers/intern/lineart/lineart_cpu.c:4637
    - 3 0xcb6a709 in lineart_main_add_triangles /home/zed/prog/blender/source/blender/gpencil_modifiers/intern/lineart/lineart_cpu.c:4670
    - 4 0xcb7d14c in MOD_lineart_compute_feature_lines /home/zed/prog/blender/source/blender/gpencil_modifiers/intern/lineart/lineart_cpu.c:5039
    - 5 0xca9aa2f in generateStrokes /home/zed/prog/blender/source/blender/gpencil_modifiers/intern/MOD_gpencillineart.c:147
    - 6 0x696519 in BKE_gpencil_modifiers_calc /home/zed/prog/blender/source/blender/blenkernel/intern/gpencil_modifier.c:805
    - 7 0xc404aa in BKE_object_handle_data_update /home/zed/prog/blender/source/blender/blenkernel/intern/object_update.c:192
    - 8 0xc424b4 in BKE_object_eval_uber_data /home/zed/prog/blender/source/blender/blenkernel/intern/object_update.c:331
    - 9 0x469b39f in operator() /home/zed/prog/blender/source/blender/depsgraph/intern/builder/deg_builder_nodes.cc:1470

I'm getting an ASAN heap overflow error. So I'm guessing that this might be a memory related issue: ``` ==14506==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x6020000e3f38 at pc 0x7fae2b1eee37 bp 0x7fff33c6af90 sp 0x7fff33c6a738 READ of size 8000 at 0x6020000e3f38 thread T0 - 0 0x7fae2b1eee36 in __interceptor_memcpy (/usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/libasan.so.6+0x39e36) - 1 0xcb165c1 in lineart_add_edge_to_array /home/zed/prog/blender/source/blender/gpencil_modifiers/intern/lineart/lineart_cpu.c:1785 - 2 0xcb6a060 in lineart_create_edges_from_isec_data /home/zed/prog/blender/source/blender/gpencil_modifiers/intern/lineart/lineart_cpu.c:4637 - 3 0xcb6a709 in lineart_main_add_triangles /home/zed/prog/blender/source/blender/gpencil_modifiers/intern/lineart/lineart_cpu.c:4670 - 4 0xcb7d14c in MOD_lineart_compute_feature_lines /home/zed/prog/blender/source/blender/gpencil_modifiers/intern/lineart/lineart_cpu.c:5039 - 5 0xca9aa2f in generateStrokes /home/zed/prog/blender/source/blender/gpencil_modifiers/intern/MOD_gpencillineart.c:147 - 6 0x696519 in BKE_gpencil_modifiers_calc /home/zed/prog/blender/source/blender/blenkernel/intern/gpencil_modifier.c:805 - 7 0xc404aa in BKE_object_handle_data_update /home/zed/prog/blender/source/blender/blenkernel/intern/object_update.c:192 - 8 0xc424b4 in BKE_object_eval_uber_data /home/zed/prog/blender/source/blender/blenkernel/intern/object_update.c:331 - 9 0x469b39f in operator() /home/zed/prog/blender/source/blender/depsgraph/intern/builder/deg_builder_nodes.cc:1470 ```

YimingWu self-assigned this 2022-08-03 04:37:30 +02:00

YimingWu commented

2022-08-03 04:37:30 +02:00

That's pretty interesting. I'll take a look.

blender-admin commented

2022-08-12 09:38:26 +02:00

This issue was referenced by 498e26fa0f

This issue was referenced by 498e26fa0f6486fa2d3bb0029b11eb1dc48a32be

YimingWu commented

2022-08-12 12:16:17 +02:00

Changed status from 'Confirmed' to: 'Resolved'

YimingWu closed this issue

2022-08-12 12:16:17 +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

LineArt: Missing intersection lines #100138