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Maniphest T48695

Significant slowdown when editing a mesh with shrinkwraps & slightly high poly
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Description

System Information
Windows 7 x64 gtx 580

Blender Version
Broken: 9c60043
Worked: ad6b7c0 (2.76)

Short description of error
Significant slowdown in terms of editing a mesh with shrinkwraps and slightly high poly

Exact steps for others to reproduce the error

  1. open attached blend file in working git build
  2. notice how fast it is to edit the base mesh (just tab in and out)
  3. open attached blend file in broken git build
  4. notice how blender locks up when tryng to tab in and out
  5. force quit blender
  6. open attached blend file in broken git build
  7. delete all the middle planes which are shrinkwrapped to base mesh
  8. edit base mesh
  9. no lockup.

Revisions and Commits

rB Blender
rB2e41df6847b0 Fix T48695: Slowdown w/ edit-mesh & shrinkwrap

Related Objects

Event Timeline

Carlo Andreacchio (candreacchio) created this task.Jun 21 2016, 3:46 AM
Carlo Andreacchio (candreacchio) raised the priority of this task from to 90.
Carlo Andreacchio (candreacchio) updated the task description. (Show Details)
Carlo Andreacchio (candreacchio) added a project: BF Blender.
Carlo Andreacchio (candreacchio) edited a custom field.
Carlo Andreacchio (candreacchio) added a subscriber: Carlo Andreacchio (candreacchio).

Forgot to attach file!

setup.blend2 MBDownload

Carlo Andreacchio (candreacchio) added a comment.EditedJun 21 2016, 3:52 AM

Found two closer builds to isolate where the slowdown occured:

1422f0d works fine
999d5a6 doesnt

Carlo Andreacchio (candreacchio) added a comment.Jun 21 2016, 3:59 AM

Should clarify, it is not just tabbing in and out which is the problem but also manipulating the base mesh.

Carlo Andreacchio (candreacchio) added projects: Modifiers, Modeling.Jun 21 2016, 5:55 AM
Campbell Barton (campbellbarton) claimed this task.Jun 21 2016, 9:23 AM
Germano Cavalcante (mano-wii) added a subscriber: Germano Cavalcante (mano-wii).Jun 22 2016, 2:18 AM
Campbell Barton (campbellbarton) lowered the priority of this task from 90 to 50.Jun 22 2016, 6:15 AM
Campbell Barton (campbellbarton) added a comment.EditedJun 22 2016, 7:03 AM

Caused by rB0b5a0d84126e629394b198508789378eb5663561

Since this commit bvhtree_from_editmesh_looptri runs for every shrink wrap modifier evaluation.

Germano Cavalcante (mano-wii) mentioned this in D2069: Fix T48695: Slowdown when editing a mesh with shrinkwraps.Jun 22 2016, 11:17 PM
Carlo Andreacchio (candreacchio) added a comment.Jun 24 2016, 9:39 AM

Any chance there is a build with D2069 applied? would like to check it out and see if it fixes the problem

Germano Cavalcante (mano-wii) added a comment.Jun 27 2016, 8:50 PM

@Carlo Andreacchio (candreacchio),
It's not the same fix but,
here's a build with a similar correction: blender_branch_refractor_bvhutils.zip

Carlo Andreacchio (candreacchio) added a comment.Jun 28 2016, 1:22 AM

@Germano Cavalcante (mano-wii) that seems to work great. nice work!

Campbell Barton (campbellbarton) changed the task status from Unknown Status to Resolved by committing rB2e41df6847b0: Fix T48695: Slowdown w/ edit-mesh & shrinkwrap.Jun 29 2016, 11:43 AM
Campbell Barton (campbellbarton) added a commit: rB2e41df6847b0: Fix T48695: Slowdown w/ edit-mesh & shrinkwrap.