private void FixedUpdate()
{
if (m_SelectedTowerPrefab != null)
{
Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
RaycastHit2D hit = Physics2D.GetRayIntersection(ray, 20, m_TileMask);
if (hit.collider != null && !EventSystem.current.IsPointerOverGameObject(m_FingerID))
{
ITile hitTile = hit.collider.GetComponent <ITile>();
if (m_MouseUp)
{
Tower tower = m_SelectedTowerPrefab.GetComponent <Tower>();
if (hitTile.IsBuildable() && GameManager.Instance.m_Money >= tower.m_Cost)
{
hitTile.Build(m_SelectedTowerPrefab);
GameManager.Instance.m_Money -= tower.m_Cost;
m_SelectedTowerPrefab = null;
m_BuildCursor.SetActive(false);
}
else
{
if (!hitTile.IsBuildable() && !hitTile.IsBlocked())
{
m_ErrorText.text = "You can't build on that tile!";
}
else if (!hitTile.IsBuildable() && hitTile.IsBlocked())
{
m_ErrorText.text = "That tile is blocked!";
}
else if (GameManager.Instance.m_Money < tower.m_Cost)
{
m_ErrorText.text = "You don't have enough money! (Need $" + (tower.m_Cost - GameManager.Instance.m_Money) + ")";
}
m_ErrorText.GetComponent <ColorFadeText>().StartFade();
}
}
else
{
m_BuildCursor.SetActive(true);
Vector3 cursorPos = hit.collider.transform.position;
cursorPos.z -= 3; // Move cursor closer to the camera than enemies and towers so it shows on top
m_BuildCursor.transform.position = cursorPos;
if (hitTile.IsBuildable())
{
// The tile is buildable, so show a preview of the tower and it's range
m_CursorSprite.sprite = m_SelectedTowerPrefab.GetComponent <SpriteRenderer>().sprite;
// Do stuff to display the tower's range with the line renderer
m_RangePreview.enabled = true;
}
else
{
// The tile is not buildable, so show the error sprite
m_RangePreview.enabled = false;
m_CursorSprite.sprite = m_ErrorCursorSprite;
}
}
}
else
{
m_BuildCursor.SetActive(false);
}
}
}