Tweak the formula used to calculate the level of detail (LOD) for props.

changelog/snippets/feature.6906.md

@@ -0,0 +1 @@
+- (#6906) Tweak the formula used to calculate the level of detail (LOD) for props.

lua/system/blueprints-props.lua

@@ -107,31 +107,38 @@ end
 --- - https://github.com/FAForever/fa/pull/4675
 ---@param prop PropBlueprint
 local function ProcessLOD(prop)
-
-    local sx = prop.SizeX or 1
-    local sy = prop.SizeY or 1
-    local sz = prop.SizeZ or 1
-
-    -- give more emphasis to the x / z value as that is easier to see in the average camera angle
-    local weighted = 0.40 * sx + 0.2 * sy + 0.4 * sz
-    if prop.ScriptClass == 'Tree' or prop.ScriptClass == 'TreeGroup' then
-        weighted = 10.0
-    end
-
-    -- https://www.desmos.com/calculator (0.9 * sqrt(100 * 500 * x))
-    local lod = 0.9 * MathSqrt(100 * 500 * weighted)
-
     if prop.Display and prop.Display.Mesh and prop.Display.Mesh.LODs then
-        local n = TableGetn(prop.Display.Mesh.LODs)
-        for k = 1, n do
-            local data = prop.Display.Mesh.LODs[k]
 
-            -- https://www.desmos.com/calculator (x * x)
-            local factor = (k / n) * (k / n)
-            local LODCutoff = factor * lod
+        local sx = prop.SizeX or 1
+        local sy = prop.SizeY or 1
+        local sz = prop.SizeZ or 1
+
+        -- give more emphasis to the x / z value as that is easier to see in the average camera angle
+        local weightedLodSize = MathSqrt(sx * sx + 0.5 * sy * sy + sz * sz)
+        local maxLod = 180 * weightedLodSize
+
+        if (prop.ScriptClass == 'Tree' and TableGetn(prop.Display.Mesh.LODs) == 3) then
+            prop.Display.Mesh.LODs[1].LODCutoff = 40
+            prop.Display.Mesh.LODs[2].LODCutoff = 200
+            prop.Display.Mesh.LODs[3].LODCutoff = 640
+            return
+        elseif (prop.ScriptClass == 'TreeGroup' and TableGetn(prop.Display.Mesh.LODs) == 3) then
+            prop.Display.Mesh.LODs[1].LODCutoff = 200
+            prop.Display.Mesh.LODs[2].LODCutoff = 200
+            prop.Display.Mesh.LODs[3].LODCutoff = 640
+            return
+        elseif (prop.ScriptClass == 'Tree' or prop.ScriptClass == 'TreeGroup') then
+            maxLod = 640
+        end
+
+        local levels = TableGetn(prop.Display.Mesh.LODs)
+        for n = 1, levels do
+            local data = prop.Display.Mesh.LODs[n]
+            local factor = (n / levels)
+            local LODCutoff = factor * maxLod
 
-            -- sanitize the value
-            data.LODCutoff = MathFloor(LODCutoff / 10 + 1) * 10
+            -- round the value
+            data.LODCutoff = MathFloor((LODCutoff + 5) / 10) * 10
         end
     end
 end