public StringForce(Projectile proj, Vector stringPosition, double stringLength, KinematicsEngine engine) :
base(proj)
{
this.stringPosition = stringPosition;
this.stringLength = stringLength;
this.engine = engine;
}
public OscillatingSpringForce(Projectile projectile, double springConstant, Vector origin, double unstretchedLength, Vector amplitude, double frequency,
KinematicsEngine engine) :
base(projectile, springConstant, unstretchedLength)
{
this.origin = origin;
this.amplitude = amplitude;
this.frequency = frequency;
this.engine = engine;
}
public override bool ShouldContinue(KinematicsEngine engine)
{
foreach (var proj in engine.Projectiles)
{
if (proj.Position.Z < 0 || (proj.Position.Z == 0 && engine.Time > 0))
{
return(false);
}
}
return(true);
}
public GlobalForce(KinematicsEngine engine)
{
this.engine = engine;
}
public UniversalGravitationForce(KinematicsEngine engine) : base(engine)
{
}
/// <summary> /// A function that detects whether the engine should continue /// </summary> /// <returns>True if the engine should continue running</returns> abstract public bool ShouldContinue(KinematicsEngine engine);
/// <param name="coefficient">The coefficient of air resistance, including drag coefficient, density of air, and cross-sectional area</param>
public AirResistanceForce(KinematicsEngine engine, double coefficient) :
base(engine)
{
this.coefficient = coefficient;
}
public ConstantGravitationForce(KinematicsEngine engine, Vector fieldStrength) :
base(engine)
{
this.fieldStrength = fieldStrength;
}
public StoppingForce(KinematicsEngine engine) :
base(engine)
{
this.engine = engine;
}
