private static IUniverse SimpleUniverse()
{
double gravConstant = 1.0;
double solarMass = 1.0; // kg
double planetMass = 1.0; // kg
double dist = 1.0; // meters
double planetSpeed = Math.Sqrt((gravConstant * solarMass) / dist);
var earth = new RigidBody6DOF(
new EuclideanKinematics(
new Transform(new Vector3(dist, 0, 0), Matrix3.Identity),
new Vector3(0, planetSpeed, 0),
Vector3.Zero
),
planetMass,
Matrix3.Identity
);
//var sunGravity = Potentials.InverseSquare(gravConstant * solarMass * planetMass); // GMm / r^2
return new BasicUniverse
{
//DynamicBodies = { earth },
//Potentials = { sunGravity }
};
}
private static IUniverse SunEarthUniverse()
{
double gravConstant = 6.67408 * Math.Pow(10, -11);
double solarMass = 1.98855 * Math.Pow(10, 30); // kg
double earthMass = 5.972 * Math.Pow(10, 24); // kg
double earthToSun = 149598023 * Math.Pow(10, 3); // meters
double earthSpeed = 29.78 * Math.Pow(10, 3); // meters/s
var earth = new RigidBody6DOF(
new EuclideanKinematics(
new Transform(new Vector3(earthToSun, 0, 0), Matrix3.Identity),
new Vector3(0, earthSpeed, 0),
Vector3.Zero
),
earthMass,
Matrix3.Identity
);
//var sunGravity = Potentials.InverseSquare(gravConstant * solarMass * earthMass); // GMm / r^2
return new BasicUniverse
{
//DynamicBodies = { earth },
//Potentials = { sunGravity }
};
}
public static IUniverse BinaryUniverse()
{
var bodyOne = new RigidBody6DOF(
new EuclideanKinematics(
new Transform(posOne, Matrix3.Identity),
velOne,
Vector3.Zero
),
massOne,
Matrix3.Identity
);
var bodyTwo = new RigidBody6DOF(
new EuclideanKinematics(
new Transform(posTwo, Matrix3.Identity),
velTwo,
Vector3.Zero
),
massTwo,
Matrix3.Identity
);
//var grav = Potentials.InverseSquare(gravConstant * massOne * massTwo); // same underlying potential
//var gravOne = new TranslatedScalarField(grav, () => bodyOne.Transform.Pos);
//var gravTwo = new TranslatedScalarField(grav, () => bodyTwo.Transform.Pos);
return new BasicUniverse
{
//DynamicBodies = { bodyOne, bodyTwo },
//Potentials = { gravOne, gravTwo }
};
}
