Fixed occasional TreeView flickering in Edit Things window, Browse Action window and Tag Explorer panel.
Updated Thing category icons in the Edit Things window. They now have "opened" and "closed" states.
Internal: added BufferedTreeView to the core controls.
Updated ZDoom game configurations (sector crush mode).
Updated ZDoom ACC.
Changed, Classic modes: added a limit on how far the view can be scrolled from the editable map area.
Fixed, Drag geometry modes: in some cases incorrect vertices were removed when using "Replace with dragged geometry" drag mode.
Fixed, Game configurations: sector special 195 ("Hidden Sector") was missing from Hexen/UDMF specials list.
Fixed, Draw Rectangle mode: fixed a crash caused by incorrectly changing text labels array when accepting the drawing.
Fixed, "Check unknown ACS scripts" error check: named scripts check was performed incorrectly causing it to fail on script names containing uppercase letters.
Updated, Curve Linedefs mode: changing angle by mouse-dragging when "Fixed circular curve" option is enabled is now performed in a more predictable way.
Updated, Curve Linedefs mode: generated geometry is now merged with existing geometry.
Added, Curve Linedefs mode: a hint label is now displayed when modifying settings using mouse-dragging.
Added, Curve Linedefs mode: number of curve vertices can now be changed using LMB+RMB-drag.
Added, Game configurations: added "ignoredextensions" parameter. It lists file extensions to be ignored when loading PK3/PK7/Directory resources.
Updated: sector triangulation logic now works ~20% faster.
Changed: a case when a pk3/pk7 archive contains several entries with identical filename is now treated as a warning, not as an error.
Fixed, Visual mode: absolute floor/ceiling brightness should not be affected by brightness transfer effects (like 3d floors).
Fixed, Draw Lines mode: in some cases unclosed sectors were created when several points were successively drawn at the same location.
Updated documentation.
Fixed, Visual mode: things in sectors affected by line slope effect were not updated when sector height was indirectly changed.
Game configurations: added "internalsoundnames" property.
Updated documentation ("Game Configuration - Basic Settings" page).
Added: guidelines can now be enabled in Draw Rectangle/Ellipse/Grid modes.
Changed, Draw Lines mode: perpendicular guidelines are now drawn for horizontal/vertical lines.
Updated, Draw Ellipse mode: the shape now always touches all sides of the bounding box.
Updated ZDoom_ACS.cfg.
Updated ZDoom_DECORATE.cfg.
Updated ZDoom ACC.
Changed, Visplane Explorer mode: vpo.dll is now initialized when entering the mode instead of after opening a map.
Fixed inconsistent Hexen Puzzle Gears names between game configuration and spawn numbers list.
Updated ZDoom_DECORATE.cfg (GetMissileDamage).
Fixed, Things mode: thing selection labels must be updated when performing undo/redo.
Fixed another case of invalid sectors being created after dragging map elements when using "Merge Dragged Geometry" and "Replace with Dragged Geometry" drag modes.
Fixed: in some cases invalid sectors were created after dragging map elements when using "Merge Dragged Geometry" and "Replace with Dragged Geometry" drag modes, when at least one of dragged linedef was facing into an enclosed void area.
Fixed a crash after drawing lines over a sector with unclosed/invalid boundaries.
Fixed(?): probably fixed a crash when closing Script Editor with an unsaved file during program termination.
Changed: "+++" and "---" prefixes are now incremented on the first step instead of the second when used in any numeric inputs, which support prefixes, except action arguments.
Fixed, Visual mode, UDMF: texture offset/scale/rotation changes were applied several times when used on several 3d-floor floors/ceilings linked to the same control sector, when using "Move Texture Offsets" / "Change Texture Scale" / "Rotate Texture CW/CCW" actions.
Updated ZDoom ACC (DamageActor).
Updated ZDoom_ACS.cfg (DamageActor).
Changed, action argument inputs: "+++" and "---" prefixes now do the same thing as they do in other numeric controls (e.g. add/subtract given value multiplied by selected map element number to/from initial value).
Changed, action argument inputs: changed value colors, added tooltips.
Probably fixed probable I/O race condition when loading images.
Fixed Visual mode stuttering due to floating point precision degradation when running the editor for several days without restarting (internal timer is now reset when saving the map or creating a new one).
Fixed, Nodes Viewer, cosmetic: Nodes Viewer window position was reset after pressing the "Rebuild Nodes" button.
Added Eternity Game configurations by printz.
Updated ZDoom_ACS.cfg (CheckClass).
Updated ZDoom ACC (CheckClass).
Changed, Sectors mode: "Flip Linedefs" and "Align Linedefs" actions will no longer flip single-sided linedefs with only front side.
Fixed, Script Editor: fixed a crash when trying to update script navigator combo box when switching to a never saved ACS script.
Changed, Browse Textures window: several textures with the same name were displayed in "All" texture set when overriding WAD textures by Folder/PK3 textures.
Fixed, Draw Geometry modes: fixed a crash when moving the mouse cursor over a vertex while holding Alt-Shift keys when there were no new points drawn in current mode.
Fixed, DECORATE support: the editor was unable to determine actor sprite when the actor itself had no sprites defined and the actor it inherited from was only defined in the game configuration.
Fixed, Drag geometry modes: linedefs without both sides were removed after dragging them when "Replace with Dragged Geometry" mode was active.
Updated ZDoom_DECORATE.cfg.
Changed, Sound Propagation mode: all sound zones are now shown when no sector is highlighted.
Changed, Sound Environments mode: the mode is now available only in UDMF map format.
Changed, Color Picker plugin: the plugin functionality is no longer available in Doom map format.
Restored the ability to create superimposed lines by dragging them with "Snap to Geometry" mode disabled.
Fixed, Sound Propagation mode: fixed a crash when a single-sided linedef had "Block Sound" flag.
Fixed, Find & Replace mode: in some cases "Find Sector/Sidedef/Linedef/Thing flags" search modes failed to find map elements with required flags.
Fixed, Edit Selection mode: in some cases incorrect geometry was created after applying multipart sector edit when "Replace with Dragged Geometry" mode was enabled.
Fixed a crash caused by eventual GDI font objects overflow.
Fixed, Draw Geometry modes: fixed a crash when moving the mouse cursor over a linedef while holding Alt-Shift keys when there were no new points drawn in current mode.
Changed, "Flip Linedefs" action: the action will no longer flip single-sided linedefs with only front side.
Fixed a crash when trying to determine sprite angles when images with non-sprite names, starting with expected characters, were present in the Sprites namespace.
Fixed: parts of UniFileds.UniValuesMatch() logic were inverted. In some cases this resulted in incorrect behavior of "Select Similar" action in UDMF map format.
Fixed, UDMF: alpha should be ignored when applying sector fade/light color gradients.
Ported eevee's fix for incorrect sector geometry occasionally created after dragging map elements (more info: https://github.com/sirjuddington/SLADE/issues/542).
Changed, Map Analysis mode: the view is now much more zoomed after clocking on a "Check very short linedefs" error check result.
Removed single testing engine launchable by the editor at once limitation (it worked properly only when using Test map actions anyway).
Fixed: re-did the fix for invalid geometry created when drawing very large grids from R2653, because it caused other issues.
Fixed, Draw Grid mode: in some cases invalid geometry was created when drawing very large grids.
Fixed, Things mode, "Rotate Clockwise" action: fixed inability to change thing angle from 0 to 315 when "doomthingrotationangles" Game Configuration property was set to true.
Updated ZDoom_DECORATE.cfg.
Fixed, Edit Linedefs / Edit Things windows: ACS script number/name was applied only when the form was accepted while displaying a tab with Action controls.
Added "doomthingrotationangles" Game Configuration property. When enabled, editor actions related to changing thing angle will snap the resulting angle to 45 degree increments. This property is set to true for vanilla game configurations.
Fixed a crash when changing game configuration from one without Thing actions support to one with them while in Things mode.
Fixed, cosmetic, DB2 bug: current editing mode button was deselected after reloading resources.
Updated documentation ("Game Configuration - Basic Settings" page).
