Camera

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;

namespace Cerios.Miner.Cameras
{
    public class Camera
    {
        public Viewport Viewport
        {
            get;
            private set;
        }

        public Camera(Viewport viewport)
        {
            Viewport = viewport;
            Origin = new Vector2(viewport.Width / 2.0f, viewport.Height / 2.0f);
            Position = Vector2.Zero;
            Zoom = 1f;
        }

        public Vector2 Position { get; set; }
        public float Rotation { get; set; }
        public Vector2 Origin { get; set; }
        public float Zoom { get; set; }

        public Matrix TransformMatrix
        {
            get
            {
                return Matrix.CreateRotationZ(Rotation) * Matrix.CreateScale(Zoom) *
                       Matrix.CreateTranslation(Position.X, Position.Y, 0);
            }
        }

        public Matrix GetParallaxMatrix(Vector2 parallax)
        {
            return Matrix.CreateTranslation(new Vector3(-Position * parallax, 0.0f)) *
                   Matrix.CreateTranslation(new Vector3(-Origin, 0.0f)) *
                   Matrix.CreateRotationZ(Rotation) *
                   Matrix.CreateScale(Zoom, Zoom, 1) *
                   Matrix.CreateTranslation(new Vector3(Origin, 0.0f));
        }
    }
}