LibGDX, here I am.

assets/modules/basegame/items/testpick.groovy

@@ -5,7 +5,7 @@
 
 
 import net.torvald.point.Point2d
-import net.torvald.terrarum.Terrarum
+import net.torvald.terrarum.TerrarumGDX
 import net.torvald.terrarum.gameactors.AVKey
 import net.torvald.terrarum.gameactors.ActorWithPhysics
 import net.torvald.terrarum.itemproperties.Calculate
@@ -14,7 +14,6 @@ import net.torvald.terrarum.itemproperties.Material
 import net.torvald.terrarum.blockproperties.Block
 // following two are NOT UNUSED!
 import org.jetbrains.annotations.NotNull
-import org.newdawn.slick.GameContainer
 
 
 
@@ -56,42 +55,42 @@ class TestPick extends GameItem {
     }
 
     @Override
-    boolean primaryUse(@NotNull GameContainer gc, int delta) {
-        int mouseTileX = Terrarum.getMouseTileX()
-        int mouseTileY = Terrarum.getMouseTileY()
+    boolean primaryUse(float delta) {
+        int mouseTileX = TerrarumGdx.getMouseTileX()
+        int mouseTileY = TerrarumGdx.getMouseTileY()
 
         def mousePoint = new Point2d(mouseTileX, mouseTileY)
-        def actorvalue = Terrarum.ingame.player.actorValue
+        def actorvalue = TerrarumGDX.ingame.player.actorValue
 
         using = true
 
         // linear search filter (check for intersection with tilewise mouse point and tilewise hitbox)
         // return false if hitting actors
-        Terrarum.ingame.actorContainer.forEach({
+        TerrarumGDX.ingame.actorContainer.forEach({
             if (it instanceof ActorWithPhysics && it.tilewiseHitbox.intersects(mousePoint))
                 return false
         })
 
         // return false if here's no tile
-        if (Block.AIR == Terrarum.ingame.world.getTileFromTerrain(mouseTileX, mouseTileY))
+        if (Block.AIR == TerrarumGDX.ingame.world.getTileFromTerrain(mouseTileX, mouseTileY))
             return false
 
         // filter passed, do the job
         double swingDmgToFrameDmg = delta.toDouble() / actorvalue.getAsDouble(AVKey.ACTION_INTERVAL)
 
-        Terrarum.ingame.world.inflictTerrainDamage(
+        TerrarumGDX.ingame.world.inflictTerrainDamage(
                 mouseTileX, mouseTileY,
-                Calculate.pickaxePower(Terrarum.ingame.player, material) * swingDmgToFrameDmg
+                Calculate.pickaxePower(TerrarumGDX.ingame.player, material) * swingDmgToFrameDmg
         )
 
         return true
     }
 
     @Override
-    boolean endPrimaryUse(@NotNull GameContainer gc, int delta) {
+    boolean endPrimaryUse(float delta) {
         using = false
         // reset action timer to zero
-        Terrarum.ingame.player.actorValue.set(AVKey.__ACTION_TIMER, 0.0)
+        TerrarumGDX.ingame.player.actorValue.set(AVKey.__ACTION_TIMER, 0.0)
         return true
     }
 }

assets/modules/modules_doc.md

@@ -1,3 +1,12 @@
+## Note to modders
+
+- You DON'T just edit built-in modules; you must make your own module even if you want to replace defaults.
+
+### To devs
+
+- make that happen :\
+
+
 ## Register modules
 
 Only the modules that enlisted in LoadOrder.csv will be loaded.