public static void Recycle(Cannonball cannonball)
{
if (cannonball.recycled)
{
return;
}
cannonball.recycled = true;
cannonball.gameObject.SetActive(false);
recycledCannonballs.Push(cannonball);
activeCannonballs.Remove(cannonball);
}
public void StartGame()
{
Cannonball.RecycleAllCannonballs();
TerrainArea.instance.CreateBoxes(terrainWidth, terrainLength);
Vector2Int plrPos = TerrainArea.instance.CreateTanks(numTanks);
Player.instance.Spawn(plrPos.x, plrPos.y);
CameraControl.instance.Follow();
time = 0;
}
// Update is called once per frame
void Update()
{
UpdateTranslation();
RotateTowardsPlayer();
time += Time.deltaTime;
if (time >= Game.instance.tankLaunchPeriod)
{
// launching cannonball
time -= Game.instance.tankLaunchPeriod;
// start and end positions
Vector3 start = transform.localPosition;
Vector2Int playerBox = TerrainArea.instance.BoxFromLocalPosition(Player.instance.transform.localPosition);
Vector3 end = TerrainArea.instance.LocalPositionFromBox(playerBox.x, playerBox.y, TerrainArea.instance.GetBox(playerBox.x, playerBox.y).top + Cannonball.RADIUS);
float distance = (new Vector2(end.z - start.z, end.x - start.x)).magnitude;
float duration = distance / Cannonball.SPEED;
if (duration < .0001f)
{
duration = 1;
}
// binary searching to determine height of cannonball arc
float low = Mathf.Max(start.y, end.y);
float high = low * 2;
float paraA, paraB, paraC;
// look for height of arc that won't hit boxes
while (true)
{
Parabola.Create(start.y, high, end.y, out paraA, out paraB, out paraC);
if (!Cannonball.CheckBoxCollision(start, end, paraA, paraB, paraC))
{
// high enough
break;
}
// not high enough. Double value
low = high;
high *= 2;
// failsafe
if (high > 9999)
{
return; // skip launch
}
}
// do binary searches to narrow down
while (high - low > Game.instance.playerParabolaPrecision)
{
float mid = (low + high) / 2;
Parabola.Create(start.y, mid, end.y, out paraA, out paraB, out paraC);
if (Cannonball.CheckBoxCollision(start, end, paraA, paraB, paraC))
{
// not high enough
low = mid;
}
else
{
// too high
high = mid;
}
}
// launch with calculated height
float height = (low + high) / 2;
Cannonball cannonball = Cannonball.Create(transform.parent, start);
cannonball.Launch(end, height, duration);
// set cannon rotation
SetCannonRotation(Mathf.Atan2(Parabola.Solve(paraA, paraB, paraC, .1f) - Parabola.Solve(paraA, paraB, paraC, 0), .1f) * Mathf.Rad2Deg);
}
}
