Prevent unbreakable blocks from being moved by ProjectRed motors (#14)

src/main/scala/mrtjp/mcframes/registry.scala

@@ -61,6 +61,13 @@ object StickRegistry {
   }
 
   def resolveStick(w: World, pos: BlockCoord, side: Int): Boolean = {
+    val p2 = pos.copy.offset(side)
+    val target = getBlock(w, p2)
+    if (
+      target != null &&
+      target.getBlockHardness(w, p2.x, p2.y, p2.z) < 0
+    ) return false
+
     def getFrame(pos: BlockCoord): IFrame = {
       val b = getBlock(w, pos)
       if (b.isInstanceOf[IFrame]) return b.asInstanceOf[IFrame]
@@ -68,10 +75,8 @@ object StickRegistry {
       if (te != null) return te
       interactionList.find(_.canInteract(w, pos.x, pos.y, pos.z)).orNull
     }
-
     val f1 = getFrame(pos)
     if (f1 != null && f1.stickOut(w, pos.x, pos.y, pos.z, side)) {
-      val p2 = pos.copy.offset(side)
       val f2 = getFrame(p2)
       return f2 == null || f2.stickIn(w, p2.x, p2.y, p2.z, side ^ 1)
     }

src/main/scala/mrtjp/relocation/movement.scala

@@ -126,6 +126,12 @@ object MovementManager2 {
       c: IMovementCallback
   ): Boolean = {
     if (blocks.size > RelocationConfig.moveLimit) return false
+    if (
+      blocks.exists { b =>
+        val block = w.getBlock(b.x, b.y, b.z)
+        block != null && block.getBlockHardness(w, b.x, b.y, b.z) < 0
+      }
+    ) return false
 
     val map = new MHashMap[(Int, Int), MSet[Int]]
       with MMultiMap[(Int, Int), Int]