Added, Game configurations, ZDoom: added Line_SetBlocking (55) linedef action.

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.

Build/Configurations/Includes/ZDoom_linedefs.cfg

@@ -656,6 +656,31 @@ zdoom
 				type = 15;
 			}
 		}
+		
+		55
+		{
+			title = "Line Set Blocking";
+			id = "Line_SetBlocking";
+			
+			arg0
+			{
+				title = "Target Line Tag";
+				type = 15;
+			}
+			arg1
+			{
+				title = "Set Flags";
+				type = 12;
+				enum = "linesetblockingflags";
+			}
+			arg2
+			{
+				title = "Clear Flags";
+				type = 12;
+				enum = "linesetblockingflags";
+			}
+		}
+		
 	}
 
 	door

Build/Configurations/Includes/ZDoom_misc.cfg

@@ -732,24 +732,20 @@ enums
 		4 = "Lower";
 	}
 	
-	generic_door_types
+	linesetblockingflags
 	{
-		0 = "Open Close";
+		0 = "None";
-		1 = "Open Stay";
+		1 = "Block creatures";
-		2 = "Close Open";
+		2 = "Block monsters";
-		3 = "Close Stay";
+		4 = "Block players";
-		64 = "Open Close (no retrigger)";
+		8 = "Block floating creatures";
-		65 = "Open Stay (no retrigger)";
+		16 = "Block projectiles";
-		66 = "Close Open (no retrigger)";
+		32 = "Block all of the above";
-		67 = "Close Stay (no retrigger)";
+		64 = "Strife railing";
-		128 = "Open Close (tag is light tag)";
+		128 = "Block use action";
-		129 = "Open Stay (tag is light tag)";
+		256 = "Block monster line of sight";
-		130 = "Close Open (tag is light tag)";
+		512 = "Block hitscan attacks";
-		131 = "Close Stay (tag is light tag)";
+		1024 = "Block sound";
-		192 = "Open Close (no retrigger, tag is light tag)";
-		193 = "Open Stay (no retrigger, tag is light tag)";
-		194 = "Close Open (no retrigger, tag is light tag)";
-		195 = "Close Stay (no retrigger, tag is light tag)";
 	}
 	
 	generic_lift_types

Source/Plugins/BuilderModes/ClassicModes/DrawRectangleMode.cs

@@ -47,6 +47,8 @@ namespace CodeImp.DoomBuilder.BuilderModes
 		protected int minpointscount;
 		protected bool alwaysrendershapehints;
 
+		private bool blockupdate;
+
 		// Interface
 		private DrawRectangleOptionsPanel panel;
 
@@ -128,6 +130,8 @@ namespace CodeImp.DoomBuilder.BuilderModes
 
 		override protected void Update() 
 		{
+			if(blockupdate) return;
+			
 			PixelColor stitchcolor = General.Colors.Highlight;
 			PixelColor losecolor = General.Colors.Selection;
 
@@ -193,6 +197,11 @@ namespace CodeImp.DoomBuilder.BuilderModes
 								renderer.RenderRectangleFilled(new RectangleF(labelCoords[i].x - vsize, labelCoords[i].y - vsize, vsize * 2.0f, vsize * 2.0f), General.Colors.InfoLine, true);
 						}
 					}
+					else
+					{
+						// Render vertex at points[0]
+						renderer.RenderRectangleFilled(new RectangleF(start.x - vsize, start.y - vsize, vsize * 2.0f, vsize * 2.0f), General.Colors.InfoLine, true);
+					}
 				} 
 				else 
 				{
@@ -354,7 +363,11 @@ namespace CodeImp.DoomBuilder.BuilderModes
 				points = new List<DrawnVertex>(); //clear points
 				Vector2D[] shape = GetShape(start, end);
 
+				// We don't want base.DrawPointAt to call Update() here, because it will mess labels[] 
+				// and trigger shape.Count number of display redraws...
+				blockupdate = true;
 				foreach(Vector2D t in shape) base.DrawPointAt(t, true, true);
+				blockupdate = false;
 
 				FinishDraw();
 			}