protected override void Initialize()
{
this.Dock = DockStyle.Fill;
//Init camera and dimensions
this.worldDimensions = new Rectangle(0, 0, this.Width, this.Height);
previousScroll = Mouse.GetState().ScrollWheelValue;
zoomIncrement = 0.01f;
camera = new Camera(GraphicsDevice.Viewport, (int)worldDimensions.Width * worldSizeMultiplier, (int)worldDimensions.Height * worldSizeMultiplier, 1f);
numOfMasses = 80;
ContentManager content = new ContentManager(Services);
content.RootDirectory = "Content";
massTexture = content.Load <Texture2D>("Image1");
selectedTexture = content.Load <Texture2D>("selectedRing");
spriteBatch = new SpriteBatch(GraphicsDevice);
selectedMass = null;
lastLMouse = Microsoft.Xna.Framework.Input.ButtonState.Released;
lastRMouse = Microsoft.Xna.Framework.Input.ButtonState.Released;
//area selection
startVector = new Vector2();
//group list
objectGroupList = new List <ObjectGroup>();
// Start the animation timer.
timer = new Timer();
timer.Interval = 1;
timer.Tick += Tick;
timer.Start();
//create simulation
springSim = new Simulation(this);
springSim.Stiffness = stiffness;
springSim.Damping = damping;
springSim.Length = 10f;
springSim.MassPerString = numOfMasses;
stringLists = new List <SimString>();
//add forces
gravity = new Gravity(new Vector2(0f, 9.81f));
springSim.AddGlobalForceGenerator(gravity);
air = new Medium(0.5f);
springSim.AddGlobalForceGenerator(air);
barrier = new ControlSide(new Rectangle(worldDimensions.X, worldDimensions.Y,
worldDimensions.Width * worldSizeMultiplier, worldDimensions.Height * worldSizeMultiplier));
springSim.AddGlobalForceGenerator(barrier);
//add integrator
integrator = new ForwardEulerIntegrator(this);
springSim.Integrator = integrator;
parentForm.saveState();
}