Calculate Trajectory Sample.

TrajectoryCalc.cs

/// <summary>
/// Calculates the trajectory.
/// </summary>
/// <returns>The trajectory.</returns>
/// <param name="start">Start.</param>
/// <param name="power">Power.</param>
/// <param name="mass">Mass.</param>
/// <param name="gravity">Gravity.</param>
/// <param name="gravityScale">Gravity scale.</param>
/// <param name="time">Time.</param>
public static Vector3 CalcTrajectory(
	Vector3 start,
	Vector3 power,
	float mass,
	Vector3 gravity,
	float gravityScale,
	float time
)
{
	var speedX = power.x / mass * Time.fixedDeltaTime;
	var speedY = power.y / mass * Time.fixedDeltaTime;
	var speedZ = power.z / mass * Time.fixedDeltaTime;

	var halfGravityX = gravity.x * 0.5f * gravityScale;
	var halfGravityY = gravity.y * 0.5f * gravityScale;
	var halfGravityZ = gravity.z * 0.5f * gravityScale;

	var positionX = speedX * time + halfGravityX * Mathf.Pow(time, 2);
	var positionY = speedY * time + halfGravityY * Mathf.Pow(time, 2);
	var positionZ = speedZ * time + halfGravityZ * Mathf.Pow(time, 2);

	return start + new Vector3(positionX, positionY, positionZ);
}

/// <summary>
/// Calculates the trajectory.
/// </summary>
/// <returns>The trajectory.</returns>
/// <param name="start">Start.</param>
/// <param name="velocity">Velocity.</param>
/// <param name="gravity">Gravity.</param>
/// <param name="gravityScale">Gravity scale.</param>
/// <param name="time">Time.</param>
public static Vector3 CalcTrajectory(
	Vector3 start,
	Vector3 velocity,
	Vector3 gravity,
	float gravityScale,
	float time
)
{
	var halfGravityX = gravity.x * 0.5f * gravityScale;
	var halfGravityY = gravity.y * 0.5f * gravityScale;
	var halfGravityZ = gravity.z * 0.5f * gravityScale;

	var positionX = velocity.x * time + halfGravityX * Mathf.Pow(time, 2);
	var positionY = velocity.y * time + halfGravityY * Mathf.Pow(time, 2);
	var positionZ = velocity.z * time + halfGravityZ * Mathf.Pow(time, 2);

	return start + new Vector3(positionX, positionY, positionZ);
}