From c4ae3b0ee4bd338995cfecf34e0aeb49f05fa70e Mon Sep 17 00:00:00 2001
From: Joris Guyonvarch
Date: Tue, 2 Sep 2014 21:35:58 +0200
Subject: Initial commit

---
 src/Geometry.elm | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 src/Geometry.elm

(limited to 'src/Geometry.elm')

diff --git a/src/Geometry.elm b/src/Geometry.elm
new file mode 100644
index 0000000..73e8d1f
--- /dev/null
+++ b/src/Geometry.elm
@@ -0,0 +1,23 @@
+module Geometry where
+
+import Vec2 (..)
+import Board (boardSize)
+
+polarToCartesian : Float -> Float -> Vec2
+polarToCartesian angle dist =
+  { x = dist * (cos angle)
+  , y = dist * (sin angle)
+  }
+
+distance : Vec2 -> Vec2 -> Float
+distance v1 v2 = sqrt((v2.x - v1.x)^2 + (v2.y - v1.y)^2)
+
+inBoard : Float -> Vec2 -> Vec2
+inBoard size pos =
+  let leftX = -boardSize.x / 2 + size
+      rightX = boardSize.x / 2 - size
+      bottomY = -boardSize.y / 2 + size
+      topY = boardSize.y / 2 - size
+  in  { x = clamp leftX rightX pos.x
+      , y = clamp bottomY topY pos.y
+      }
-- 
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