#jira UE-16405 - Hitch occurs when undoing BSP manipulations
Summary of changes:
- Added 'fuzzy map' for quick look up of nearly equal FVectors, improving the BSP rebuild algorithm from O(n^4) to O(n*m) where m is much smaller than n.
- Added 'fuzzy map' for quick look up of nearly equal FPlanes, improving plane merging from O(n^2) to O(n).
- Changed TTransArrays in UModel to regular arrays, to remove a lot of transaction modifies during BSP rebuild.
- UModel array allocations are now allocated upfront where possible, instead of constant dynamic resizing.
- Optimized algorithm used by UModelComponent::GenerateElements to reduce allocations and simplify map lookups.
- Removed call to ULevel::CommitModelSurfaces in UModelComponent::PostEditUndo, which was causing an enormous amount of unnecessary work on each undo operation. It is now done, as ever, by UWorld::Tick.
#reviewedby Matt.Kuhlenschmidt
[CL 2600444 by Richard TalbotWatkin in Main branch]
I have reviewed each change carefully, but it is a large change and I could have missed something! Here is a summary of the types of changes in this CL:
* Made nullptr checks consistent (the plurality of the changes are of this type)
* Completed switch statements (IE, switch did not explicitly handle default case, but had unhandled enum entries - this is the second most popular type of fix)
* Removed unused variables
* Removed redundant initializations
* WidgetNavigationCustomization.cpp was fixed by the owner
* integers converted to floats where result was stored in a float
* Removed redundent null checks (e.g. before delete statements)
* Renamed variables to prevent non-obvious shadowing
* Fixed use of bitwise & when checking for equality to an enum entry (which is often 0)
* Fixes for some copy paste errors (e.g. FoliageEdMode.cpp)
[CL 2498053 by Dan Oconnor in Main branch]
#jira UE-8963 - UV scale is reset when new BSP is added on top of another
#jira UE-11368 - uv scale of materials on hollow BSP does not persist after building geometry
- Fixed a bug in FPoly::Scale where the texture was being scaled in the wrong direction.
- Corrected UEditorEngine::polyUpdateMaster so that the "master poly" Base (UV offset) and UV directions take into account any transform on the parent Brush.
#reviewedby Matt.Kuhlenschmidt
[CL 2477538 by Richard TalbotWatkin in Main branch]
#jira UE-1291 - EDITOR: Snap To Scale Grid: Adjusting the Scale Grid Snap Value highlights functionality problems scale distance is not uniform
[CL 2359772 by Richard TalbotWatkin in Main branch]
This is a subset of changes (compiler warning fixes needed to compile Linux editor) from pull request 185 by sbc100, 3dluvr, wshearn, abarbu et al: https://github.com/EpicGames/UnrealEngine/pull/185
- Remove superfluous expressions without side effect.
[CL 2085579 by Dmitry Rekman in Main branch]
