randomised torch flicker

src/net/torvald/terrarum/ReferencingRanges.kt

@@ -0,0 +1,24 @@
+package net.torvald.terrarum
+
+
+/**
+ * See REFERENCING.md
+ */
+object ReferencingRanges {
+
+    val TILES = 0..4095
+    val WALLS = 4096..8191
+    val WIRES = 8192..8447
+    val ITEMS_STATIC = 8448..0x0F_FFFF
+    val ITEMS_DYNAMIC = 0x10_0000..0x0FFF_FFFF
+    val ACTORS = 0x1000_0000..0x7FFF_FFFF
+
+    val ACTORS_BEHIND  = 0x1000_0000..0x1FFF_FFFF // Rendered behind (e.g. tapestries)
+    val ACTORS_MIDDLE  = 0x2000_0000..0x4FFF_FFFF // Regular actors (e.g. almost all of them)
+    val ACTORS_MIDTOP  = 0x5000_0000..0x5FFF_FFFF // Special (e.g. weapon swung, bullets, dropped item, particles)
+    val ACTORS_FRONT   = 0x6000_0000..0x6FFF_FFFF // Rendered front (e.g. fake tile)
+    val ACTORS_OVERLAY = 0x7000_0000..0x7FFF_FFFF // Rendered as screen overlay, not affected by light nor environment overlays
+
+    val VIRTUAL_TILES = -1 downTo -65536
+
+}