判定攻擊目标是否在攻擊者扇形攻擊範圍類

忽略高度Y軸的扇形判定 

public static float GetDistance(float x1, float y1, float x2, float y2)

{

return Mathf.Sqrt(GetDistancePower(x1, y1, x2, y2));

}

public static float GetDistancePower(float x1, float y1, float x2, float y2)

{

return Mathf.Pow(x1 - x2, 2) + Mathf.Pow(y1 - y2, 2);

}

public static float GetDistance(Transform from, Transform to)

{

return GetDistance(from.position.x, to.position.x, from.position.z, to.position.z);

}

public static Vector3 GetVetor(Vector3 from, Vector3 to)

{

return new Vector3(to.x - from.x, from.y, to.z - from.z);

}

/// 

/// 判定攻擊目标是否在攻擊者扇形攻擊範圍類

/// 

/// 攻擊者

/// 被擊者

/// 扇形半徑

/// 扇形角度

/// 

public static bool IsInSector(Transform source, Transform target, float radius, float angle)

{

float STDistance = GetDistance(source, target);

Vector3 _tVector = GetVetor(source.transform.position, target.transform.position);

Vector3 _sVector = (source.position + (source.rotation * Vector3.forward) * radius);

float targetAngle = Vector3.Angle(_tVector, _sVector);

if (STDistance < radius && targetAngle < angle / 2 && targetAngle > -(angle / 2))

return true;

return false;

}