private GameObject SpawnEnemy(GameObject enemyPrefab)
{
if (enemyPrefab == null)
{
return(null);
}
Vector2 position = GameManager.Instance.MainPlayer.transform.position;
// also we should spawn them so we don't see them appearing
// from a x-axis point of view
// assuming we can see from [ -1 ... 1 ]
// that means we are interested in spawning them from [ -2 ... -1 , 1 ... 2 ]
bool xSign = RandomManager.Boolean();
bool ySign = RandomManager.Boolean();
float xDistance = RandomManager.Next(0.0f, m_spawnVariableDistance);
float yDistance = RandomManager.Next(0.0f, m_spawnVariableDistance);
Vector2 spawnPosition = position +
new Vector2(xSign ? m_spawnMinDistance + xDistance : -m_spawnMinDistance - xDistance,
ySign ? m_spawnMinDistance + yDistance : -m_spawnMinDistance - yDistance);
GameObject obj = Instantiate(enemyPrefab);
if (obj == null)
{
return(null);
}
obj.transform.position = spawnPosition;
return(obj);
}
protected override void OnUpdate()
{
base.OnUpdate();
m_time += TimeManager.Dt;
switch (CurrentState)
{
case State.E_Idle:
if (m_time >= m_idleTime)
{
CurrentState = State.E_Seeking;
m_time = 0;
}
break;
case State.E_Seeking:
if (m_time >= m_seekTime)
{
CurrentState = State.E_Idle;
m_time = 0;
}
break;
}
if (CurrentState == State.E_Idle)
{
return;
}
// just go toward the main player
Vector2 playerPos = GameManager.Instance.MainPlayer.transform.position;
string currentGroup = m_er ? m_er.GetCurrentGroup() : "";
string newFrameGroup = "Up";
bool setFrame = false;
Vector2 wantedNewPos = transform.position;
// we prefer to continue in direction we are going if possible
// there are 4 possible directions, but basically horizontal vs vertical
bool preferVertical;
if (currentGroup == "Up" || currentGroup == "Down")
{
preferVertical = true;
}
else if (currentGroup == "Left" || currentGroup == "Right")
{
preferVertical = false;
}
else
{
preferVertical = RandomManager.Boolean();
Debug.Log("Slime perfer vertical is " + preferVertical.ToString());
}
// TODO: Extract into functions to avoid this copy pasta between preferVertical and non perferVertical
if (preferVertical)
{
if (playerPos.y > transform.position.y)
{
wantedNewPos.y = transform.position.y + (TimeManager.Dt * m_speed);
if (wantedNewPos.y > playerPos.y)
{
wantedNewPos.y = playerPos.y;
}
newFrameGroup = "Up";
setFrame = true;
}
else if (playerPos.y < transform.position.y)
{
wantedNewPos.y = transform.position.y - (TimeManager.Dt * m_speed);
if (wantedNewPos.y < playerPos.y)
{
wantedNewPos.y = playerPos.y;
}
newFrameGroup = "Down";
setFrame = true;
}
else if (playerPos.x < transform.position.x)
{
wantedNewPos.x = transform.position.x - (TimeManager.Dt * m_speed);
if (wantedNewPos.x < playerPos.x)
{
wantedNewPos.x = playerPos.x;
}
newFrameGroup = "Left";
setFrame = true;
}
else if (playerPos.x > transform.position.x)
{
wantedNewPos.x = transform.position.x + (TimeManager.Dt * m_speed);
if (wantedNewPos.x > playerPos.x)
{
wantedNewPos.x = playerPos.x;
}
newFrameGroup = "Right";
setFrame = true;
}
}
else
{
if (playerPos.x < transform.position.x)
{
wantedNewPos.x = transform.position.x - (TimeManager.Dt * m_speed);
if (wantedNewPos.x < playerPos.x)
{
wantedNewPos.x = playerPos.x;
}
newFrameGroup = "Left";
setFrame = true;
}
else if (playerPos.x > transform.position.x)
{
wantedNewPos.x = transform.position.x + (TimeManager.Dt * m_speed);
if (wantedNewPos.x > playerPos.x)
{
wantedNewPos.x = playerPos.x;
}
newFrameGroup = "Right";
setFrame = true;
}
else if (playerPos.y > transform.position.y)
{
wantedNewPos.y = transform.position.y + (TimeManager.Dt * m_speed);
if (wantedNewPos.y > playerPos.y)
{
wantedNewPos.y = playerPos.y;
}
newFrameGroup = "Up";
setFrame = true;
}
else if (playerPos.y < transform.position.y)
{
wantedNewPos.y = transform.position.y - (TimeManager.Dt * m_speed);
if (wantedNewPos.y < playerPos.y)
{
wantedNewPos.y = playerPos.y;
}
newFrameGroup = "Down";
setFrame = true;
}
}
transform.position = wantedNewPos;
if (setFrame && m_er)
{
m_er.SetCurrentGroup(newFrameGroup);
}
}