/// <summary>
/// Calculates approximately trajectory for rockets
/// </summary>
/// <param name="sun"></param>
/// <param name="planetController"></param>
/// <returns></returns>
private Vector3[] CalculateForecastTrajectory(CelestialObject sun, PlanetViewController planetController)
{
_trajectoryPoints[0] = planetController.GetMuzzle().position;
_trajectoryPoints[1] = planetController.GetMuzzle().position + planetController.transform.up;
var time = 0f;
var expectedDeltaTime = 0.016f;
for (int i = 2; i < TRAJECTORY_POINT_COUNT; i++)
{
var dir = (_trajectoryPoints[i - 1] - _trajectoryPoints[i - 2]).normalized;
var sunPosition = sun.transform.position;
var gravityPowerMagnitude =
sun.GetGravityModifier() / Mathf.Pow(Vector3.Distance(sunPosition, _trajectoryPoints[i - 1]), 2);
time += expectedDeltaTime;
var speed = PlanetViewController.ROCKET_START_VELOCITY +
planetController.GetCurrentRocketSettings().acceleration *time;
var gravityPower = (sunPosition - _trajectoryPoints[i - 1]).normalized * gravityPowerMagnitude;
var delta = (dir * (speed) + gravityPower) * expectedDeltaTime;
_trajectoryPoints[i] = _trajectoryPoints[i - 1] + delta;
}
return(_trajectoryPoints);
}
