public Universe Load(string filename)
{
TextReader reader = new StreamReader(filename);
GravityObject var;
List<GravityObject> planets = new List<GravityObject>();
int index = 0;
string line = reader.ReadLine();
while (line != null)
{
if (line.Contains("{"))
{
line = reader.ReadLine();
float x = float.Parse(line.Substring(1, line.Length - 1));
line = reader.ReadLine();
float y = float.Parse(line.Substring(1, line.Length - 1));
Vector2 coordinates = new Vector2(x, y);
line = reader.ReadLine();
float xv = float.Parse(line.Substring(1, line.Length - 1));
line = reader.ReadLine();
float yv = float.Parse(line.Substring(1, line.Length - 1));
Vector2 velocity = new Vector2(xv, yv);
line = reader.ReadLine();
DebugFileManager.GetDebugFileManager().WriteLineF(line);
float radius = float.Parse(line.Substring(1, line.Length - 1));
var = new GravityObject(index, coordinates, velocity, radius);
planets.Add(var);
index++;
if (!reader.ReadLine().Contains("}"))
{
DebugFileManager.GetDebugFileManager().WriteLineF("There was an error in loading the planet data. Please make sure the savegame is not corrupted.");
Environment.Exit(0);
}
}
line = reader.ReadLine();
}
Universe universe = new Universe();
foreach (GravityObject go in planets)
{
universe.AddGravityObject(go);
}
DebugFileManager dfm = DebugFileManager.GetDebugFileManager();
dfm.WriteLine("[SAVEGAME LOADING INFORMATION]");
dfm.WriteLine(" We managed to load the savegame. Here are the results generated from the savefile:");
foreach (GravityObject go in universe.planets)
{
dfm.WriteLine("\t[GRAVITYOBJECT START]");
dfm.WriteLine("\t "+ go.Diameter);
dfm.WriteLine("\t[GRAVITYOBJECT END]");
}
dfm.WriteLine("[SAVEGAME LOADING INFORMATION END]");
dfm.Flush();
return universe;
}
public void CreatePath(Vector2 coordinates, Vector2 velocity, float mass, int points)
{
ghosts.Clear();
GravityObject go = new GravityObject(planets.Count, coordinates, velocity, mass, true);
for (int i = 0; i < points; i++)
{
foreach (GravityObject go2 in planets)
{
go.CalculateForce(go2);
}
go.Update(-1);
go.ClearForce();
ghosts.Add(new PathPoint( (int) go.Coordinates.X, (int) go.Coordinates.Y, 600, Color.White));
}
}
public void AddGravityObject(GravityObject go)
{
planets.Add(go);
}
public bool Handled(GravityObject go)
{
return false;
}
/// <summary>
/// Checks whether this object collides with the passed object,
/// and if so, destroys the lighter object and increases the mass
/// of the bigger object by the mass of the lighter object.
/// If masses are equal, this object takes precendence.
/// </summary>
/// <param name="target">The object against which collisions will be checked.</param>
public void CheckCollision(GravityObject target)
{
if (IsMarkedDelete) return;
float dY = target.coordinates.Y - coordinates.Y;
float dX = target.coordinates.X - coordinates.X;
float c = Pythagoras(dY, dX);
// Compares the distance between the planets to the radius of both planets added together.
// Evaluates to true if objects have a collision.
if (c <= (radius + target.Radius))
{
int r = (this.color.R + target.color.R / 2);
int g = (this.color.G + target.color.G / 2);
int b = (this.color.B + target.color.B / 2);
float targetSignificance = target.Mass / this.mass;
if (radius > target.Radius)
{
this.mass += target.Mass;
Vector2 vTargetTotal = target.velocity * new Vector2(targetSignificance, targetSignificance);
Vector2 vTotal = this.velocity + vTargetTotal;
this.velocity = vTotal / (1f + targetSignificance);
this.color = new Color(r, g, b);
target.IsMarkedDelete = true;
}
else if (radius < target.Radius)
{
target.Mass += this.mass;
Vector2 vTargetTotal = target.velocity * new Vector2(targetSignificance, targetSignificance);
Vector2 vTotal = this.velocity + vTargetTotal;
target.velocity = vTotal / (1f + targetSignificance);
target.color = new Color(r, g, b);
this.IsMarkedDelete = true;
}
else
{
this.mass += target.Mass;
this.coordinates.X += dX/2;
this.coordinates.Y += dY/2;
this.velocity = ((this.velocity + target.velocity) / new Vector2(2, 2));
this.color = new Color(r, g, b);
target.IsMarkedDelete = true;
}
RecalculateSize();
target.RecalculateSize();
}
}
/// <summary>
/// Calculate the force between the 'this' object and the passed object.
/// Force will only be applied on this object, so for a correct calculation of the force
/// between object a and b, you need to run both a.CalculateForce(b) and b.CalculateForce(a).
/// </summary>
/// <param name="go">The GravityObject against which the force of this object will be calculated.</param>
public void CalculateForce(GravityObject go)
{
float dX = go.coordinates.X - coordinates.X;
float dY = go.coordinates.Y - coordinates.Y;
float r = Pythagoras(dY, dX);
float force = Universe.GRAVITATIONAL_CONSTANT * ((mass * go.Mass) /(float)Math.Pow(r,3));
lastForce = force;
this.force.Y += dY * force;
this.force.X += dX * force;
}
