public static Vector2 ProjectClosest(HookComputer hook, Vector2 fromPosition, Vector2 targetPosition, float maxTime, int fleetSize)
{
var boostSpeed = hook.Hook.BoostThrust;
var bulletSpeed = hook.ShotThrust(fleetSize) * 10;
var path = targetPosition - fromPosition;
var pLen = path.Length();
var maxD = bulletSpeed * maxTime + boostSpeed * hook.Hook.BoostDuration;
// if(maxD>pLen){
// Console.Write("Switch");
// }
return(fromPosition + path * (1.0f / pLen) * MathF.Min(pLen - 10.0f, maxD));
}
public static Vector2[] ProjectClosest(HookComputer hook, float maxTime, Vector2[] fromPosition, Vector2[] targetPosition, int[] fleetSize)
{
var boostSpeed = hook.Hook.BoostThrust;
int N = fromPosition.Length;
Vector2[] vout = new Vector2[N];
for (int i = 0; i < N; i++)
{
var bulletSpeed = hook.ShotThrust(fleetSize[i]) * 10;
var path = targetPosition[i] - fromPosition[i];
var pLen = path.Length();
var maxD = bulletSpeed * maxTime + boostSpeed * hook.Hook.BoostDuration;
vout[i] = fromPosition[i] + path * (1.0f / pLen) * MathF.Min(pLen - 10.0f, maxD);
}
return(vout);
}
public static Vector2 FiringIntercept(
HookComputer hook,
Vector2 fromPosition,
Vector2 targetPosition,
Vector2 targetMomentum,
int fleetSize,
out int timeToImpact
)
{
var toTarget = targetPosition - fromPosition;
var bulletSpeed = hook.ShotThrust(fleetSize) * 10;
var a = Vector2.Dot(targetMomentum, targetMomentum) - (bulletSpeed * bulletSpeed);
var b = 2 * Vector2.Dot(targetMomentum, toTarget);
var c = Vector2.Dot(toTarget, toTarget);
var p = -b / (2 * a);
var q = MathF.Sqrt((b * b) - 4 * a * c) / (2 * a);
var t1 = p - q;
var t2 = p + q;
var t = 0f;
if (t1 > t2 && t2 > 0)
{
t = t2;
}
else
{
t = t1;
}
var aimSpot = targetPosition + targetMomentum * t;
var bulletPath = aimSpot - fromPosition;
timeToImpact = (int)(bulletPath.Length() / bulletSpeed);//speed must be in units per second
if (timeToImpact > hook.Hook.BulletLife)
{
timeToImpact = int.MaxValue;
}
return(aimSpot);
}
public static bool MightHit(
HookComputer hook,
Fleet shooter,
Fleet monstrosity,
float angle
)
{
Vector2 dirN = new Vector2(MathF.Cos(angle), MathF.Sin(angle));
bool hit = false;
foreach (var firer in shooter.Ships)
{
foreach (var other in monstrosity.Ships)
{
var toTarget = other.Position - firer.Position;
var bulletSpeed = hook.ShotThrust(shooter.Ships.Count) * 10;
var b = toTarget.Length();
var c = Vector2.Dot(dirN, toTarget);
var q = MathF.Sqrt((b * b) - c * c);
var bulletPath = toTarget;
var timeToImpact = (int)(bulletPath.Length() / bulletSpeed);//speed must be in units per second
if (timeToImpact < hook.Hook.BulletLife && q < 1000 && c > 0)
{
hit = true;
break;
}
}
}
return(hit);
}
