factor out glmatrix in camera2d

cruft/graphics/Camera2D.js

@@ -2,7 +2,7 @@ import Actor from "engine/core/Actor";
 import Renderer from "engine/graphics/Renderer"
 import SpriteRenderer from "engine/graphics/plugins/SpriteRenderer";
 import Transform2D from "engine/components/Transform2D";
-import {vec2} from "engine/lib/gl-matrix";
+import {vec2} from "../math/math";
 import engine, {scheduler} from "engine/engine";
 import Script from "engine/processes/Script";
 
@@ -15,7 +15,7 @@ export default class Camera2D extends Actor {//todo set/get widht//height
 		this._renderer.registerPlugin(new SpriteRenderer());
 		document.body.appendChild(this._renderer.canvas);//not sure how want to manage access to the dom right now. so tmp here. 
 		this.addComponent(new Transform2D()); //think about using a height variable or somthing? :/ Hmm idk. 
-		this.getComponent("transform").scale = [width/2, height/2] //might want to make variables to like set zoom and stuff idk. 
+		this.getComponent("transform").scale = new vec2(width/2, height/2) //might want to make variables to like set zoom and stuff idk. 
 
 		//todo track that script so we can delete it. 
 		//also its not in update because I want it to be the last thing that happens
@@ -40,12 +40,11 @@ export default class Camera2D extends Actor {//todo set/get widht//height
 		var position = transform.position;
 		var scale = transform.scale;
 
-		var tmp = vec2.create();
-		tmp[0] = (mouse[0] - window.innerWidth/2);
-		tmp[1] = (window.innerHeight - mouse[1] - window.innerHeight/2);
+		var tmp = vec2.zero();
+		tmp.x = (mouse.x - window.innerWidth/2);
+		tmp.y = (window.innerHeight - mouse.y - window.innerHeight/2);
 
-		tmp[0] += position[0];
-		tmp[1] += position[1];
+		tmp.add(position);
 
 		return tmp;
 	}
@@ -56,14 +55,13 @@ export default class Camera2D extends Actor {//todo set/get widht//height
 			var transform = this.getComponent("transform");
 			var world = target.getComponent("transform").getWorldPosition();
 			var selfWorld = transform.getWorldPosition();
-			var dif = vec2.create();
-			vec2.sub(dif, world, selfWorld);
-			var len = vec2.len(dif);
-			var scale = (len < 900)? .002:.05;
-			vec2.scale(dif, dif, .07);
+			var dif = vec2.subtract(world, selfWorld);
+			var len = dif.length();
+			var scale = (len < 900) ? 0.002 : 0.05;
+			dif.scale(0.07);
 
 			var pos = transform.position;
-			vec2.add(pos, pos, dif);
+			pos.add(dif)
 			transform.position = pos;