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Bug #781

Error in symmetry 2x2 = 3?

Added by doctorzuber over 11 years ago. Updated over 8 years ago.

Status:
Closed
Severity:
Normal
Assignee:
-
Category:
Gameplay
Target version:
-
Start date:
06/16/2013
% Done:

100%

Version:
0.20.2
Platform:
Windows
Expansion:
Language:
English (US)
Mod Related:
No
Votes:
Arrow u r green
Arrow d r red

Description

Reverted back to no mods on a clean save to verify behavior
Here's the STR

1> Choose a Mk 1 Lander Can
2> Select a 1x1 panel (do not place yet)
3> press X
4> place the 1x1 panel on the side of the can
5> select another 1x1 panel (do not place yet)
6> line up the 1x1 panel on the edge of the first 1x1 panel
7> press A, Press X, place the panel
8> reselect and replace the first 1x1 panel in the same place

You should now have 7 parts. a lander can, and a 1x3 on each side

9> try placing a part on any of the four panels on the ends
10> laugh

Pretty sure it's not supposed to do that. Note, this can be replicated with other parts, this was just the quickest and easiest STR I could find for it.

2x symmetry bug.png (1.52 MB) 2x symmetry bug.png [email protected] doctorzuber, 06/16/2013 02:52 AM
2x Symmetry Fig 2.png (855 KB) 2x Symmetry Fig 2.png [email protected] doctorzuber, 07/03/2013 11:51 AM
2x Symmetry Fig 3.png (1.26 MB) 2x Symmetry Fig 3.png [email protected] doctorzuber, 07/03/2013 11:51 AM
screenshot1820.png (2.51 MB) screenshot1820.png [email protected] Claw, 07/17/2016 08:18 PM
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History

#1 Updated by doctorzuber over 11 years ago

917
918

Here's an alternate STR, and some additional screenshots.

1> Mk1 Lander Can
2> Jr. Docking port on top
3> FLT-200 on top of the docking port
4> radially attach 6 Jr. Docking ports to the fuel tank (see fig 2)
5> carefully detach the first docking port, and move it to the side using 2x symmetry
6> try attaching anything, to any of the 12 various docking ports. (see fig 3)
7> cry

#2 Updated by Ted over 11 years ago

  • Category set to Gameplay

#3 Updated by triffid_hunter over 11 years ago

yep, KSP does lots of weird stuff with stacked symmetry.

Other bugs that occur when stacking symmetry are:

  • when setting action groups, only some objects are selected. Eg on a 4+4=16 stacked symmetry, it'll select all items in the local 2nd level group of 4, but only 1 out of 4 on the other 3 first level groups. I.e.; with (xxxx)(xxxx)(xxxx)(xxxx), if I click on the first 'x', it will select (XXXX)(Xooo)(Xooo)(Xooo) [X = selected, o = not selected]
  • multiple parts placed on top of each other, causing spontaneous rapid disassembly and phantom forces once launched. Usually these can be spotted from the Z-buffer ghosting, but sometimes it's only visible from certain angles.
  • When using Editor Extensions (or simply moving craft files around the filesystem) to switch between VAB and SPH, things get extremely strange when you try to place mirrored parts on something with VAB symmetry

I would dearly love for this to be sorted out! I do not believe that there's any ambiguity as to what is correct behaviour in each case, the code just needs a good eyeballing to find the few changes which will allow stacked symmetry to work correctly.

#4 Updated by TriggerAu over 8 years ago

  • Status changed from New to Needs Clarification

#5 Updated by Claw over 8 years ago

19142

Fixed in 1.1.X, panels and docking ports tested as described above.

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