/// <summary>
/// Simulation constractor
/// </summary>
/// <param name="bullet">get bullet values</param>
/// <param name="wind">get wind values</param>
/// <param name="target">get target values</param>
public Simulation(Bullet bullet, Wind wind, Target target)
{
this.bullet = bullet;
this.wind = wind;
this.target = target;
}
/// <summary>
/// Calculates bullet's velocity or location in a given direction and time.
/// </summary>
/// <param name="calc">Defines whether velocity or location needs to be calculated.</param>
/// <param name="direction">the direction</param>
/// <param name="wind">Wind can influence the bullet on the X axis.</param>
/// <param name="t">Time t - measured in seconds.</param>
/// <returns>bullet's velocity or location in a given direction and time</returns>
public double CalcByDirection(Calculate calc, Direction direction, Wind wind,
double t)
{
double k = this.ressistance; //ressistance
double m = this.mass; //mass
double b = k / m; //ressistance over mass
double g = 0; //Gravity
double v = 0; //Initial speed
//Define initial speed abd gravity based on the given direction.
switch (direction)
{
case Direction.X:
v = this.velocityVector.XVelocity + wind.Velocity;
break;
case Direction.Y:
v = this.velocityVector.YVelocity * -1;
g = 9.8;
break;
case Direction.Z:
v = this.velocityVector.ZVelocity;
break;
}
double output = 0;
//Chooses the needed formula according to the given parameters.
switch (calc)
{
case Calculate.LOCATION:
if (k != 0) //if the ressistance not zero
{
output = (-g + b * g * t + b * v + (g - b * v) * Math.Pow(Math.E, -b * t)) /
Math.Pow(b, 2);
}
else // the ressistance is zero
{
output = (g * Math.Pow(t, 2) + 2 * t * v) / 2;
}
break;
case Calculate.VELOCITY:
if (k != 0) //if the ressistance not zero
{
output = ((g / b) + (Math.Pow(Math.E, -b * t) * (v - (g / b))));
}
else // the ressistance is zero
{
output = g * t + v;
}
break;
}
if (direction == Direction.Y)
{
output *= -1;
}
return(output);
}
