git-svn-id: svn://svn.ijw.co.nz/svn/OpenRa@1212 993157c7-ee19-0410-b2c4-bb4e9862e678

OpenRa.Game/Sidebar.cs

@@ -24,12 +24,12 @@ namespace OpenRa.Game
 		public Sidebar(Race race, Renderer renderer)
 		{
 			techTree.CurrentRace = race;
-			techTree.Build("FACT");
-			techTree.Build("POWR");
-			techTree.Build("BARR");
-			techTree.Build("PROC");
-			techTree.Build("WEAP");
-			techTree.Build("DOME");
+			techTree.Build("FACT", true);
+			//techTree.Build("POWR");
+			//techTree.Build("BARR");
+			//techTree.Build("PROC");
+			//techTree.Build("WEAP");
+			//techTree.Build("DOME");
 			this.renderer = renderer;
 			this.spriteRenderer = new SpriteRenderer(renderer);
 

OpenRa.TechTree/TechTree.cs

@@ -27,8 +27,6 @@ namespace OpenRa.TechTree
 		public TechTree()
 		{
 			LoadRules();
-
-			built.Add("FACT");
 			CheckAll();
 		}
 
@@ -65,15 +63,20 @@ namespace OpenRa.TechTree
 				objects.Add(p.a, new Item(p.a, p.b, rulesFile.GetSection(p.a), p.c));
 		}
 
-		public bool Build(string key)
+		public bool Build(string key, bool force)
 		{
 			Item b = objects[key];
-			if (!b.CanBuild) return false;
+			if (!force && !b.CanBuild) return false;
 			built.Add(key);
 			CheckAll();
 			return true;
 		}
 
+		public bool Build(string key)
+		{
+			return Build(key, false);
+		}
+
 		public bool Unbuild(string key)
 		{
 			Item b = objects[key];

rules.ini

@@ -1670,6 +1670,7 @@ Crewed=yes
 
 ; sandbag wall
 [SBAG]
+Prerequisite=fact
 Strength=1
 Armor=none
 TechLevel=2
@@ -1682,6 +1683,7 @@ Adjacent=1
 
 ; concrete wall
 [BRIK]
+Prerequisite=fact
 Strength=1
 Armor=none
 TechLevel=8
@@ -1694,6 +1696,7 @@ Adjacent=1
 
 ; wire fence
 [FENC]
+Prerequisite=fact
 Strength=1
 Armor=none
 TechLevel=2