3 files changed, 38 insertions, 1 deletions
diff --git a/src/model/EntityPosition.ts b/src/model/EntityPosition.ts
index 815eceb..28b3837 100644
--- a/src/model/EntityPosition.ts
+++ b/src/model/EntityPosition.ts
@@ -1,11 +1,14 @@
 'use strict';
 
 
-import Direction from '../model/Direction';
+import Direction from './Direction';
 import Entity from './Entity';
 import Position from './Position';
+import Transition from './Transition';
 
 
 export default class EntityPosition {
+        public transition: Transition = null;
+
         constructor(public entity: Entity, public position: Position, public direction: Direction) {}
 }
diff --git a/src/model/Position.ts b/src/model/Position.ts
index 1db37af..1f9b719 100644
--- a/src/model/Position.ts
+++ b/src/model/Position.ts
@@ -1,9 +1,35 @@
 'use strict';
 
 
+import Direction from './Direction';
+
+
 export default class Position {
         constructor(public x: number, public y: number) {}
 
+        translate(dir: Direction, amount: number): Position {
+		var p = new Position(this.x, this.y);
+
+		switch (dir) {
+		case Direction.North:
+			p.y -= amount;
+			break;
+
+		case Direction.East:
+			p.x += amount;
+			break;
+
+		case Direction.South:
+			p.y += amount;
+			break;
+
+		case Direction.West:
+			p.x -= amount;
+		}
+
+		return p;
+	}
+
         asString(): string {
                 return `${this.x},${this.y}`;
         }
diff --git a/src/model/Transition.ts b/src/model/Transition.ts
new file mode 100644
index 0000000..0a3e69b
--- /dev/null
+++ b/src/model/Transition.ts
@@ -0,0 +1,8 @@
+'use strict';
+
+
+import Position from './Position';
+
+export default class Transition {
+        constructor(public start: number, public end: number, public orig: Position, public dest: Position) {}
+};