Add hidden wreck/heap metal modoption for tests

gamedata/alldefs_post.lua

@@ -41,6 +41,18 @@ end
 -- DEFS POST PROCESSING
 -------------------------
 
+local modOptions = Spring.GetModOptions()
+
+local wreckMetalRatio = 0.6
+local heapMetalRatio = 0.25
+
+if modOptions.wreckage_metal_ratio ~= 0.6 then
+	-- An actual f(x): [0,1] -> [0,1/3], with f(0.6)=0.25 would be a hermite polynomial or something
+	local low, mid, high = 0, 1 / 3, 1 -- so ignore that and do something over-simple, because, gamedev
+	wreckMetalRatio = math.clamp(modOptions.wreckage_metal_ratio, low, high)
+	heapMetalRatio = math.clamp((wreckMetalRatio + 0.15) / 3, low, mid)
+end
+
 --[[ Sanitize to whole frames (plus leeways because float arithmetic is bonkers).
      The engine uses full frames for actual reload times, but forwards the raw
      value to LuaUI (so for example calculated DPS is incorrect without sanitisation). ]]
@@ -75,8 +87,6 @@ local function processWeapons(unitDefName, unitDef)
 end
 
 function UnitDef_Post(name, uDef)
-	local modOptions = Spring.GetModOptions()
-
 	local isScav = string.sub(name, -5, -1) == "_scav"
 	local basename = isScav and string.sub(name, 1, -6) or name
 
@@ -920,14 +930,14 @@ function UnitDef_Post(name, uDef)
 			if uDef.featuredefs.dead then
 				uDef.featuredefs.dead.damage = uDef.health
 				if uDef.metalcost and uDef.energycost then
-					uDef.featuredefs.dead.metal = math.floor(uDef.metalcost * 0.6)
+					uDef.featuredefs.dead.metal = math.floor(uDef.metalcost * wreckMetalRatio)
 				end
 			end
 			-- heaps
 			if uDef.featuredefs.heap then
 				uDef.featuredefs.heap.damage = uDef.health
 				if uDef.metalcost and uDef.energycost then
-					uDef.featuredefs.heap.metal = math.floor(uDef.metalcost * 0.25)
+					uDef.featuredefs.heap.metal = math.floor(uDef.metalcost * heapMetalRatio)
 				end
 			end
 		end

luaui/Widgets/gui_reclaim_field_highlight.lua

@@ -74,6 +74,10 @@ local checkFrequency = 0.66	-- Update rate, in seconds
 local epsilon = 300 -- Clustering distance - increased to merge nearby fields and prevent overlaps
 
 local minFeatureValue = 9
+if Spring.GetModOptions().wreckage_metal_ratio then
+	local ratio = Spring.GetModOptions().wreckage_metal_ratio / 0.6 -- 0.3333 to 1.25
+	minFeatureValue = minFeatureValue * (ratio ^ 1 / 3) -- gravitate strongly toward 1
+end
 
 -- Maximum cluster size in elmos - clusters larger than this will be split into sub-clusters
 local maxClusterSize = 3000 -- Adjust this value: smaller = more sub-clusters, larger = fewer but bigger fields

modoptions.lua

@@ -505,6 +505,19 @@ local options = {
         section	= "options",
     },
 
+    {
+        key		= "wreckage_metal_ratio",
+        name	= "Unit Wreck Metal Percentage",
+        desc	= "Percent of unit metal that is left in its wrecks (and heaps)",
+        hidden 	= true,
+        type	= "number",
+        section	= "options",
+        def		= 0.6,
+        min		= 0, -- see usage in alldefs_post for actual bounds
+        max		= 1,
+        step	= 0.05,
+    },
+
     {
         key		= "coop",
         name	= "Cooperative mode",