private void OnTriggerEnter2D(Collider2D collision)
{
// Early exit if the outer shape is already complete.
if (shapeSlot.shapeComplete)
{
return;
}
GameObject currentStick = collision.gameObject;
SpriteRenderer currentStickSprite = currentStick.GetComponent <SpriteRenderer>();
// Exit early if *somehow* an object that is not the object being dragged collides with a stickSlot
if (currentStick != m_EventSystem.currentSelectedGameObject)
{
return;
}
// If the stick is close enough in the right x,y position
if ((Mathf.Abs(currentStick.transform.position.x - gameObject.transform.position.x) < 1) &&
(Mathf.Abs(currentStick.transform.position.y - gameObject.transform.position.y) < 1))
{
// And the stick is rotated along the z axis similarly enough
if (Mathf.Abs(currentStick.transform.rotation.z - gameObject.transform.rotation.z) < 10)
{
// If the slot is empty, simply add stick to slot.
if (heldSticks.Count == 0)
{
shapeSlot.AddToSidesFilled(true);
// Block moved outside of condition (below) to remove avoid code redundancy.
}
else if (heldSticks.Count == 1) // If the color is different than the held stick, mix them.
{
Color heldStickColor = heldSticks[0].GetComponent <SpriteRenderer>().color;
if (currentStickSprite.color != heldStickColor)
{
currentStick.GetComponent <SpriteRenderer>().color = MixColors(currentStickSprite.color, heldStickColor);
currentStickSprite.sortingOrder = 3;
shapeSlot.AddToSidesFilled(false);
}
else // Early exit to avoid stick placement if the colors match.
{
return;
}
}
else // Avoid stick placement if there are 2 sticks already by returning from the function
{
return;
}
Camera.main.GetComponent <DraggableObject2D>().draggingMode = false;
currentStick.transform.position = gameObject.transform.position;
currentStick.transform.eulerAngles = gameObject.transform.eulerAngles;
heldSticks.Add(currentStick);
currentStick.GetComponent <Stick>().SetParentSlot(this);
topStickColor = currentStick.GetComponent <SpriteRenderer>().color;
shapeSlot.CheckShapeCompleteness();
}
}
}
// Update is called once per frame
void Update()
{
// Press R to restart a level
if (Input.GetKeyDown(KeyCode.R))
{
SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex);
}
/*---- CLICK TO DRAG ----*/
// First frame when user clicks left mouse
if (Input.GetMouseButtonDown(0))
{
// If a ray hit a collider (2D)
var hit2d = Physics2D.Raycast(Camera.main.ScreenToWorldPoint(Input.mousePosition), Vector2.zero);
if (hit2d && (hit2d.collider.gameObject.tag == "Stick"))
{
currentStick = hit2d.collider.gameObject;
// Early exit from dragging if a stick is part of a completed shape.
StickSlot stickParentSlot = currentStick.GetComponent <Stick>().GetParentSlot();
if (stickParentSlot != null)
{
if (stickParentSlot.GetShapeSlot().shapeComplete)
{
return;
}
}
stickCenter = currentStick.transform.position;
touchPosition = Camera.main.ScreenToWorldPoint(Input.mousePosition);
offset = touchPosition - stickCenter;
currentStickSprite = currentStick.GetComponent <SpriteRenderer>();
draggingMode = true;
m_EventSystem.SetSelectedGameObject(currentStick);
}
}
// Every frame when user holds on left mouse
if (Input.GetMouseButton(0))
{
if (draggingMode)
{
// if stick is in a slot: remove it from that slot now
foreach (GameObject slot in slotGameObjects)
{
if (slot.GetComponent <StickSlot>().heldSticks.Contains(currentStick))
{
slot.GetComponent <StickSlot>().heldSticks.Remove(currentStick);
currentStick.GetComponent <Stick>().SetParentSlot(null);
Color originalColor = currentStick.GetComponent <Stick>().originalColor;
// If the stick being removed has a modified color (i.e. there is another stick under):
if (currentStickSprite.color != originalColor)
{
ShapeSlot stickShape = slot.transform.parent.GetComponent <ShapeSlot>();
stickShape.RemoveFromSidesFilled(false);
currentStickSprite.color = originalColor;
currentStickSprite.sortingOrder = 2;
StickSlot currentStickSlot = slot.GetComponent <StickSlot>();
currentStickSlot.topStickColor = currentStickSlot.heldSticks[0].GetComponent <SpriteRenderer>().color;
stickShape.CheckShapeCompleteness();
}
else
{
slot.transform.parent.GetComponent <ShapeSlot>().RemoveFromSidesFilled(true);
slot.GetComponent <StickSlot>().topStickColor = Color.white;
}
// avoid unnecessary computations by exiting loop, since only 1 side can be removed at a time
// TODO change into a while loop?
break;
}
}
touchPosition = Camera.main.ScreenToWorldPoint(Input.mousePosition);
newCenter = touchPosition - offset;
currentStick.transform.position = new Vector3(newCenter.x, newCenter.y, newCenter.z);
}
}
if (currentStick && draggingMode && (Input.GetKey(KeyCode.LeftArrow) || Input.GetKey(KeyCode.A)))
{
if (currentStick == m_EventSystem.currentSelectedGameObject)
{
currentStick.transform.Rotate(Vector3.forward * velocity * Time.deltaTime);
}
}
if (currentStick && draggingMode && (Input.GetKey(KeyCode.RightArrow) || Input.GetKey(KeyCode.D)))
{
if (currentStick == m_EventSystem.currentSelectedGameObject)
{
currentStick.transform.Rotate(Vector3.back * velocity * Time.deltaTime);
}
}
// When mouse is released
if (Input.GetMouseButtonUp(0))
{
draggingMode = false;
currentStick = null;
}
}