/// <summary>
/// Calculates and applies drag due to planetary gravity from a pre-calculated GravimetricResult
/// </summary>
/// <param name="grav">Pre-calculated GravimetricResult (contains a relative force of gravity and distance between planet and object at time of calculation)</param>
public void ApplyDragDueToGravity(GravimetricResult grav)
{
//drag formula: atmospheric unit - (distance in megametres / scaling factor) = drag
//example distant planet drag calc: 0.25 - (24457 / 100000) = 0.00543 = extremely low drag
//example close planet drag calc: 0.25 - (1500 / 100000) = 0.235 = extremely high drag
float drag = AtmosphericUnit - (grav.GetDistanceBetweenObjectAndBody() / ScaleFactor); //calculate drag from gravimetrics result's distance
if (GetComponent <Rigidbody>().drag + drag > 0)
{
GetComponent <Rigidbody>().drag += drag; //ensure applying drag never results in a minus drag value
}
}
void FixedUpdate()
{
//apply gravimetric effect to object from all bodies
GravimetricResult currentGrav = new GravimetricResult(new Vector3(0, 0, 0), 0);
if (GetComponent <Atmospherics>())
{
GetComponent <Atmospherics>().ResetDrag(); //reset drag so new calculation can be used
}
for (int i = 0; i < Bodies.Length; i++)
{
if (Bodies[i])
{
currentGrav = GetGravity(Bodies[i]); //get gravity calculation result
GetComponent <Rigidbody>().AddRelativeForce(currentGrav.GetForce()); //apply gravimetric force
if (GetComponent <Atmospherics>())
{
GetComponent <Atmospherics>().ApplyDragDueToGravity(currentGrav); //call for atmospheric drag to be applied
}
}
}
}
