From 17a58e0c4c67f27d87635bf1b2ca50fb11795ad3 Mon Sep 17 00:00:00 2001
From: Joris Guyonvarch
Date: Sat, 7 Mar 2015 15:12:02 +0100
Subject: Organizing source code with subdirectories

---
 src/Utils/Geometry.elm | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 src/Utils/Geometry.elm

(limited to 'src/Utils/Geometry.elm')

diff --git a/src/Utils/Geometry.elm b/src/Utils/Geometry.elm
new file mode 100644
index 0000000..085026f
--- /dev/null
+++ b/src/Utils/Geometry.elm
@@ -0,0 +1,27 @@
+module Utils.Geometry
+  ( polarToCartesian
+  , distance
+  , inBoard
+  ) where
+
+import Model.Vec2 (..)
+import Model.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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