private static void RenderObject(Context ctx, AstronomicalObject obj,
double xOffset, double yOffset)
{
ctx.SetSourceRGB(0.769, 0.282, 0.295);
ctx.Arc(xOffset + obj.X, yOffset + obj.Y, obj.Diameter, 0, 2 * PI);
ctx.ClosePath();
ctx.Fill();
}
public override void Update(long deltaTime)
{
for (var i = 0; i < _planets.Length; i++)
{
_planets[i] = UpdateObject(_planets[i], _sun);
}
_moon = UpdateObject(_moon, _planets[2]);
}
private static AstronomicalObject UpdateObject(
AstronomicalObject target,
AstronomicalObject reference)
{
target.Phase += target.RotationSpeed;
if (target.Phase >= 360)
{
target.Phase = 0;
}
target.X = reference.X + target.Distance * Cos(PI * target.Phase / 180);
target.Y = reference.Y + target.Distance * Sin(PI * target.Phase / 180);
return(target);
}
public override void Init(Dictionary <string, string> model)
{
_sun = new AstronomicalObject
{
Name = "Sun",
Diameter = 1392684
};
_moon = new AstronomicalObject
{
Name = "Moon",
Distance = 20,
Diameter = 4,
RotationSpeed = 2.5
};
var mercury = new AstronomicalObject
{
Name = "Mercury",
Distance = 57909000,
Diameter = 4879.4,
RotationSpeed = 4.5
};
var venus = new AstronomicalObject
{
Name = "Venus",
Distance = 109160000,
Diameter = 12103.6,
RotationSpeed = 1.9
};
var earth = new AstronomicalObject
{
Name = "Earth",
Distance = 149600000,
Diameter = 12756.3,
RotationSpeed = 1
};
var mars = new AstronomicalObject
{
Name = "Mars",
Distance = 227990000,
Diameter = 6792.4,
RotationSpeed = 1.0 / 2
};
var jupiter = new AstronomicalObject
{
Name = "Jupiter",
Distance = 778360000,
Diameter = 142984,
RotationSpeed = 1.0 / 11
};
var saturn = new AstronomicalObject
{
Name = "Saturn",
Distance = 1433500000,
Diameter = 120536,
RotationSpeed = 1.0 / 13
};
var uranus = new AstronomicalObject
{
Name = "Uranus",
Distance = 2872400000,
Diameter = 51118,
RotationSpeed = 1.0 / 15
};
var neptune = new AstronomicalObject
{
Name = "Neptune",
Distance = 4498400000,
Diameter = 49528,
RotationSpeed = 1.0 / 18
};
_planets = new []
{
mercury, venus, earth, mars, jupiter, saturn, uranus, neptune
};
for (var i = 0; i < _planets.Length; i++)
{
var planet = _planets[i];
planet.Distance /= 1000000;
planet.X = planet.Distance;
planet.Diameter /= 1000;
_planets[i] = planet;
}
_sun.Diameter /= 40000;
_moon.X = earth.X + _moon.Distance;
}
private static string AstrObjToString(AstronomicalObject obj)
{
return(obj.Name + ", " + obj.X + ", " + obj.Y);
}