Ladder: Add editor handles to drag length

planet/Objects.ocd/Structures.ocd/Ladder.ocd/LadderPart.ocd/Script.c

@@ -98,3 +98,5 @@ local ActMap = {
 		Procedure = DFA_ATTACH,
 	},
 };
+
+local Plane = 220;

planet/Objects.ocd/Structures.ocd/Ladder.ocd/Script.c

@@ -7,6 +7,7 @@
 */
 
 local segments;
+local SegmentHeight = 8;
 
 func Initialize()
 {
@@ -14,16 +15,32 @@ func Initialize()
 	CreateSegments();
 }
 
-public func SetLength(int segment_count)
+private func GetSegmentCount()
 {
-	if (GetLength(segments) == segment_count) return;
+	return GetLength(segments);
+}
+
+public func SetLength(int segment_count, int extension_direction)
+{
+	// Adjust the length of the ladder
+	// segment_count: New number of segments
+	// extension_direction: Which end of the ladder to expand/shrink. 0: Top and bottom. +1: Bottom. -1: Top
+	var old_segment_count = GetSegmentCount();
+	if (old_segment_count == segment_count) return;
 	if (segment_count < 2) return;
 
 	for (var segment in segments)
 		segment->RemoveObject();
 		
-	var new_height = segment_count * 8;
+	var new_height = segment_count * SegmentHeight;
 	SetShape(-3, new_height / -2, 5, new_height);
+	
+	if (extension_direction)
+	{
+		var height_diff = (segment_count - old_segment_count) * SegmentHeight;
+		MovePosition(0, height_diff/2 * extension_direction);
+	}
+
 	CreateSegments();
 }
 
@@ -33,10 +50,10 @@ public func SetLength(int segment_count)
 func CreateSegments()
 {
 	segments = [];
-	var nr_segments = (GetBottom() - GetTop()) / 8;
+	var nr_segments = (GetBottom() - GetTop()) / SegmentHeight;
 	for (var index = 0; index < nr_segments; index++)
 	{
-		var y = GetTop() + index * 8;
+		var y = GetTop() + index * SegmentHeight;
 		var segment = CreateObject(MetalLadderSegment, 0, y+4);
 		segment->SetMaster(this, index);
 		// Store the segments.
@@ -79,6 +96,39 @@ public func SaveScenarioObject(props)
 	return true;
 }
 
+
+/* Editor dragging */
+
+private func GetTopHandle() { return [0, GetSegmentCount() * SegmentHeight / -2]; }
+private func SetTopHandle(pt) { SetLength(Max(2, (GetBottom() - pt[1] + SegmentHeight/2) / SegmentHeight), -1); }
+private func GetBottomHandle() { return [0, GetSegmentCount() * SegmentHeight / 2]; }
+private func SetBottomHandle(pt) { SetLength(Max(2, (pt[1] - GetTop() + SegmentHeight/2) / SegmentHeight), +1); }
+
+public func Definition(def)
+{
+	// Drag handles for ladder length
+	if (!def.EditorProps) def.EditorProps = {};
+	def.EditorProps.top_handle = {
+	  Name="$TopHandle$",
+	  Type="point",
+	  Relative=true,
+	  HorizontalFix=true,
+	  AsyncGet="GetTopHandle",
+	  Set="SetTopHandle",
+	  Priority=1,
+	  Color=0x80ff00 };
+	def.EditorProps.bottom_handle = {
+	  Name="$BottomHandle$",
+	  Type="point",
+	  Relative=true,
+	  HorizontalFix=true,
+	  AsyncGet="GetBottomHandle",
+	  Set="SetBottomHandle",
+	  Color=0xff8000 };
+}
+
+
 /*-- Properties --*/
 
 local Name = "$Name$";
+local Plane = 221;

planet/Objects.ocd/Structures.ocd/Ladder.ocd/StringTblDE.txt

@@ -1 +1,3 @@
 Name=Leiter
+TopHandle=Oberkante
+BottomHandle=Unterkante

planet/Objects.ocd/Structures.ocd/Ladder.ocd/StringTblUS.txt

@@ -1 +1,3 @@
 Name=Ladder
+TopHandle=Top end
+BottomHandle=Bottom end