protected void LookAtNearestEnemy(List <GameObject> enemies)
{
if (enemies.Count < 1)
{
return;
}
float minDistance = DirectionAndDistanceCalculator.CalculateDistance(player.transform.Get2DPosition(), enemies[0].transform.Get2DPosition());
int nearestEnemyIndex = 0;
for (int i = 1; i < enemies.Count; i++)
{
if (DirectionAndDistanceCalculator.CalculateDistance(player.transform.Get2DPosition(), enemies[i].transform.Get2DPosition()) < minDistance)
{
minDistance = DirectionAndDistanceCalculator.CalculateDistance(player.transform.Get2DPosition(), enemies[i].transform.Get2DPosition());
nearestEnemyIndex = i;
}
}
Vector2 enemyPos = enemies[nearestEnemyIndex].transform.Get2DPosition();
if ((player.transform.Get2DPosition().IsAtLeftOf(enemyPos) && !player.IsFacingRight) || (!player.transform.Get2DPosition().IsAtLeftOf(enemyPos) && player.IsFacingRight))
{
player.Flip();
}
}
// todo : random next patrol point
protected void Patrol()
{
if (movementHandler.PathEmpty())
{
PathRequestManager.RequestPath(enemy.transform.position, enemy.PatrolWayPoints[nextWaypointIndex].Get2DPosition(), enemy.gameObject, enemy.UnwalkableLayer, OnPathFound);
}
if (patrolWaitTimer > 0)
{
patrolWaitTimer -= Time.deltaTime;
return;
}
FlipIfNeeded();
enemy.Anim.SetBool(enemy.WalkingAnimationBool, true);
movementHandler.MoveAlongPath();
if (DirectionAndDistanceCalculator.CalculateDistance(enemy.transform.Get2DPosition(), enemy.PatrolWayPoints[nextWaypointIndex].Get2DPosition()) < GameManager.Instance.aiReachingPrecision)
{
nextWaypointIndex = (nextWaypointIndex + 1) % enemy.PatrolWayPoints.Length;
PathRequestManager.RequestPath(enemy.transform.position, enemy.PatrolWayPoints[nextWaypointIndex].Get2DPosition(), enemy.gameObject, enemy.UnwalkableLayer, OnPathFound);
patrolWaitTimer = enemy.PatrolDelay;
enemy.Anim.SetBool(enemy.WalkingAnimationBool, false);
}
}
protected bool PlayerInChasingRange()
{
return(DirectionAndDistanceCalculator.CalculateDistance(enemy.transform.Get2DPosition(), enemy.Player.Get2DPosition()) <= enemy.chasingRange);
}
public bool CheckObstacles(GameObject go, Vector2 startPos, Vector2 targetPos, LayerMask unwalkableLayer, out Vector2 obstaclePosition)
{
BoxCollider2D boxCollider = go.GetComponent <BoxCollider2D>();
Vector2 unitScale = new Vector2(Mathf.Abs(go.transform.localScale.x), Mathf.Abs(go.transform.localScale.y));
RaycastHit2D hit;
Vector2 rayOrigin;
Vector2 boxColliderCenter = new Vector2(startPos.x - boxCollider.offset.x * unitScale.x, startPos.y + boxCollider.offset.y * unitScale.y);
float xGap = (boxCollider.size.x * unitScale.x) / 2;
float yGap = (boxCollider.size.y * unitScale.y) / 2;
Vector2 rayCastingCenter;
Vector2 direction = DirectionAndDistanceCalculator.CalculateDirection(startPos, targetPos);
float distance = DirectionAndDistanceCalculator.CalculateDistance(startPos, targetPos);
if (direction.x == 0) // walking vertically
{
if (direction.y > 0) // going up
{
rayCastingCenter = boxColliderCenter + new Vector2(0, yGap);
}
else // going down
{
rayCastingCenter = boxColliderCenter - new Vector2(0, yGap);
}
for (int i = -1; i < 2; i++)
{
rayOrigin = rayCastingCenter + new Vector2(i * xGap, 0);
hit = Physics2D.Raycast(rayOrigin, direction, distance, unwalkableLayer);
Debug.DrawLine(rayOrigin, rayOrigin + direction);
if (hit.collider != null)
{
//Debug.Log(go.name + " is gonna hit an obstacle !");
obstaclePosition = hit.point;
return(true);
}
}
}
else
{
if (direction.x > 0)
{
rayCastingCenter = boxColliderCenter + new Vector2(xGap, 0);
}
else
{
rayCastingCenter = boxColliderCenter - new Vector2(xGap, 0);
}
for (int i = -1; i < 2; i++)
{
rayOrigin = rayCastingCenter + new Vector2(0, i * yGap);
hit = Physics2D.Raycast(rayOrigin, direction, distance, unwalkableLayer);
Debug.DrawLine(rayOrigin, rayOrigin + direction);
if (hit.collider != null)
{
//Debug.Log(go.name + " is gonna hit an obstacle !");
obstaclePosition = hit.point;
return(true);
}
}
if (direction.y != 0)
{
Vector2 lastRayOrigin = boxColliderCenter + new Vector2(-xGap * Math.Sign(direction.x), yGap * Math.Sign(direction.y));
hit = Physics2D.Raycast(lastRayOrigin, direction, distance, unwalkableLayer);
Debug.DrawLine(lastRayOrigin, lastRayOrigin + direction);
if (hit.collider != null)
{
//Debug.Log(go.name + " is gonna hit an obstacle !");
obstaclePosition = hit.point;
return(true);
}
}
}
obstaclePosition = new Vector2(short.MinValue, short.MinValue);
return(false);
}