From 22a135b20588c0c6c3c82e32cac15389e3a1fdc6 Mon Sep 17 00:00:00 2001
From: Slash <daniele.baracchi@gmail.com>
Date: Fri, 7 Aug 2015 23:01:50 +0200
Subject: [PATCH] first vm attempt

---
 vm/vm.hs | 80 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100644 vm/vm.hs

diff --git a/vm/vm.hs b/vm/vm.hs
new file mode 100644
index 0000000..634adf4
--- /dev/null
+++ b/vm/vm.hs
@@ -0,0 +1,80 @@
+import Data.Set (Set)
+import qualified Data.Set as Set
+import Test.QuickCheck
+
+type Cell = (Int, Int)
+
+data Board = Board {
+           boardWidth :: Int,
+           boardHeight :: Int,
+           filled :: Set Cell
+           }
+
+data Unit = Unit {
+          unitMembers :: Set Cell,
+          unitPivot :: Cell
+          }
+          deriving Show
+
+data Command = MoveW
+             | MoveE
+             | MoveSW
+             | MoveSE
+             | RotateClockwise
+             | RotateCounterclockwise
+
+
+data Game = Game Board Unit
+-- data Game = Game { board :: Board, unit :: Unit }
+
+-- isValidPosition :: Unit -> Board
+
+data Notes = OK
+           | Collision
+           | CollisionWithRowElision
+
+-- step :: Game -> Command -> (Game, Notes)
+-- step game inst
+
+applyCommand :: Unit -> Command -> Unit
+
+applyCommand (Unit members pivot) MoveW = Unit (Set.map move members) (move pivot) where
+    move (y, x) = (y - 1, x)
+
+applyCommand (Unit members pivot) MoveE = Unit (Set.map move members) (move pivot) where
+    move (y, x) = (y + 1, x)
+
+applyCommand (Unit members pivot) MoveSW = Unit (Set.map move members) (move pivot) where
+    move (y, x) = (y - ((x + 1) `mod` 2), x + 1)
+
+applyCommand (Unit members pivot) MoveSE = Unit (Set.map move members) (move pivot) where
+    move (y, x) = (y + (x `mod` 2), x + 1)
+
+applyCommand (Unit members pivot) RotateClockwise = Unit (Set.map move members) (move pivot) where
+    move (y, x) = (y + (x `mod` 2), x + 1)
+
+applyCommand (Unit members pivot) RotateCounterclockwise = Unit (Set.map move members) (move pivot) where
+    move (y, x) = (y + (x `mod` 2), x + 1)
+
+test :: (Cell -> Cell) -> [Bool]
+test f = [f (0,3) == (2,5), f (1,3) == (3, 6), f (2,3) == (3,7), f (3, 3) == (4,8), f (2, 4) == (2,7)]
+
+test2 :: (Cell -> Cell) -> [Bool]
+test2 f = [f (2,5) == (3,6), f (3,6) == (2, 7), f (2,7) == (1,7), f (1, 7) == (1,6), f (1, 6) == (1,5), f (1, 5) == (2, 5)]
+
+testx :: (Int -> Int) -> [Bool]
+testx f = [f 0 == 2, f 1 == 3, f 2 == 3, f 3 == 4, f 2 == 2]
+
+info :: Cell -> Cell -> (Int, Int)
+info (py, px) (y, x) = (ddiag, doriz) where
+    ddiag = x - px
+    doriz = y - py + (if px `mod` 2 == 0 then ddiag + ddiag `mod` 2 else ddiag - ddiag `mod` 2) `div` 2
+
+rotate :: Cell -> Cell -> Cell
+rotate (py, px) (y, x) = (py - ddiag + doriz `div` 2, px + doriz) where
+    (ddiag, doriz) = info (py, px) (y, x)
+
+deepCheck p = quickCheckWith (stdArgs { maxSuccess = 10000 }) p
+
+testTutto = do
+        deepCheck (\pivot cell -> let r2 = rotate pivot in (r2 . r2 . r2 . r2 . r2 . r2) cell == cell)