From 84a3c92ac1a23085208f6a6cce9a34a35f8082d9 Mon Sep 17 00:00:00 2001
From: Nathan Kunicki <me@nathankunicki.com>
Date: Fri, 4 Mar 2016 11:31:31 -0500
Subject: [PATCH] Added camera positioning

---
 examples/pong/pong.js | 16 ++++++++--------
 src/classes/game.js   | 21 +++++++++++++++++++++
 2 files changed, 29 insertions(+), 8 deletions(-)

diff --git a/examples/pong/pong.js b/examples/pong/pong.js
index 1c47886..ced457b 100644
--- a/examples/pong/pong.js
+++ b/examples/pong/pong.js
@@ -66,11 +66,11 @@ window.onload = function () {
     leftPaddle.update = function (delta) {
 
         if (pong.inputs.keyboard.isPressed(KeyConsts.CHAR_Q) || pong.inputs.keyboard.isPressed(KeyConsts.UP)) {
-            leftPaddle.pos.y -= (0.5 * delta);
+            leftPaddle.top -= (0.5 * delta);
         }
 
         if (pong.inputs.keyboard.isPressed(KeyConsts.CHAR_A) || pong.inputs.keyboard.isPressed(KeyConsts.DOWN)) {
-            leftPaddle.pos.y += (0.5 * delta);
+            leftPaddle.top += (0.5 * delta);
         }
 
         if (leftPaddle.top > height - (baseSize * 8)) {
@@ -92,19 +92,19 @@ window.onload = function () {
     rightPaddle.update = function (delta) {
 
         if (pong.inputs.keyboard.isPressed(KeyConsts.CHAR_O)) {
-            rightPaddle.pos.y -= (0.5 * delta);
+            rightPaddle.top -= (0.5 * delta);
         }
 
         if (pong.inputs.keyboard.isPressed(KeyConsts.CHAR_L)) {
-            rightPaddle.pos.y += (0.5 * delta);
+            rightPaddle.top += (0.5 * delta);
         }
 
-        if (rightPaddle.pos.top > height - (baseSize * 8)) {
-            rightPaddle.pos.y = height - (baseSize * 8);
+        if (rightPaddle.top > height - (baseSize * 8)) {
+            rightPaddle.top = height - (baseSize * 8);
         }
 
-        if (rightPaddle.pos.top < baseSize) {
-            rightPaddle.pos.y = baseSize;
+        if (rightPaddle.top < baseSize) {
+            rightPaddle.top = baseSize;
         }
 
         if (rightPaddle.isCollidingWith(ball) && ball.state.speed.x > 0) {
diff --git a/src/classes/game.js b/src/classes/game.js
index 976c7b3..4d85701 100644
--- a/src/classes/game.js
+++ b/src/classes/game.js
@@ -1,6 +1,7 @@
 "use strict";
 
 import Entity from "./entity.js";
+import Vector2D from "./vector2d.js";
 import KeyboardInput from "./keyboardinput.js";
 
 class Game extends Entity {
@@ -101,6 +102,26 @@ class Game extends Entity {
     }
 
 
+    setCamera (x, y) {
+
+        if (x instanceof Vector2D) {
+
+            let pos = x.clone();
+            pos.x = -pos.x;
+            pos.y = -pos.y;
+
+            this.pos = pos;
+
+        } else {
+
+            this.pos.x = -x;
+            this.pos.y = -y;
+
+        }
+
+    }
+
+
     step (delta) {
 
         this.frameCounter++;