public void Launch(TargetPoint target)
{
Vector3 launchPoint = mortar.position;
Vector3 targetPoint = target.Position;
targetPoint.y = 0f;
Vector2 dir;
dir.x = targetPoint.x - launchPoint.x;
dir.y = targetPoint.z - launchPoint.z;
float x = dir.magnitude;
float y = -launchPoint.y;
dir /= x;
float g = 9.81f;
float s = launchSpeed;
float s2 = s * s;
float r = s2 * s2 - g * (g * x * x + 2f * y * s2);
float tanTheta = (s2 + Mathf.Sqrt(r)) / (g * x);
float cosTheta = Mathf.Cos(Mathf.Atan(tanTheta));
float sinTheta = cosTheta * tanTheta;
mortar.localRotation =
Quaternion.LookRotation(new Vector3(dir.x, tanTheta, dir.y));
//SpawnSHell method는 defensegame안에 있고, initialize는 shell이 가지고 있음
DefenseGame.SpawnShell().Initialize(launchPoint, targetPoint,
new Vector3(s * cosTheta * dir.x, s * sinTheta, s * cosTheta * dir.y),
shellBlastRadius, shellDamage);
//Vector3 prev = launchPoint, next;
//for (int i = 1; i <= 10; i++)
//{
// float t = i / 10f;
// float dx = s * cosTheta * t;
// float dy = s * sinTheta * t - 0.5f * g * t * t;
// next = launchPoint + new Vector3(dir.x * dx, dy, dir.y * dx);
// Debug.DrawLine(prev, next, Color.blue, 1f);
// prev = next;
//}
//Debug.DrawLine(launchPoint, targetPoint, Color.yellow);
//Debug.DrawLine(launchPoint, targetPoint, Color.yellow);
//Debug.DrawLine(
// new Vector3(launchPoint.x, 0.01f, launchPoint.z),
// new Vector3(launchPoint.x + dir.x * x, 0.01f, launchPoint.z + dir.y * x),
// Color.white, 1f
//);
}
public override bool GameUpdate()
{
age += Time.deltaTime;
Vector3 p = launchPoint + launchVelocity * age;
p.y -= 0.5f * 9.81f * age * age;
if (p.y <= 0f) //땅에 닿으면 반환
{
DefenseGame.SpawnExplosion().Initialize(targetPoint, blastRadius, damage);
OriginFactory.Reclaim(this);
return(false);
}
transform.localPosition = p;
Vector3 d = launchVelocity;
d.y -= 9.81f * age;
transform.localRotation = Quaternion.LookRotation(d);
DefenseGame.SpawnExplosion().Initialize(p, 0.1f); //explosion을 재사용해서 trail로 사용함
return(true);
}
private void OnEnable()
{
instance = this;
}
