support window resizing correctly

src/main/kotlin/Colin.kt

@@ -46,6 +46,12 @@ class Colin
 		cam.update()
 	}
 
+	fun resize(width: Int, height: Int)
+	{
+		cam.viewportWidth = width.toFloat()
+		cam.viewportHeight = height.toFloat()
+	}
+
 	fun update(deltaTime: Float)
 	{
 		val stick = Controllers.getCurrent()?.let { pad ->

src/main/kotlin/Game.kt

@@ -116,6 +116,14 @@ class Game: ApplicationAdapter()
 		suzanneInstance.transform = Matrix4().translate(3.0f, 1.0f, -3.5f)
 	}
 
+	override fun resize(width: Int, height: Int)
+	{
+		colin.resize(width, height)
+		spriteBatch.projectionMatrix.setToOrtho2D(0.0f, 0.0f,
+			Gdx.graphics.getWidth().toFloat(),
+			Gdx.graphics.getHeight().toFloat());
+	}
+
 	private fun update(deltaTime: Float)
 	{
 		colin.update(deltaTime)

src/main/kotlin/Program.kt

@@ -14,6 +14,6 @@ fun main()
 	//conf.useVsync(false)
 	//conf.setForegroundFPS(300)
 	conf.setWindowedMode(1280, 720)
-	conf.setResizable(false)
+	conf.setResizable(true)
 	Lwjgl3Application(Game(), conf)
 }