//Highlight a unit when mouse is above it
void HighlightUnit()
{
//Change material on the latest unit we highlighted
if (highlightThisUnit != null)
{
//But make sure the unit we want to change material on is not selected
bool isSelected = false;
for (int i = 0; i < selectedUnits.Count; i++)
{
if (selectedUnits[i] == highlightThisUnit)
{
isSelected = true;
break;
}
}
if (!isSelected)
{
highlightThisUnit.GetComponent <FriendlyUnitController>().ChangeMaterial(MaterialState.NormalMaterial);
}
highlightThisUnit = null;
}
//Fire a ray from the mouse position to get the unit we want to highlight
RaycastHit hit;
//Fire ray from camera
if (Physics.Raycast(Camera.main.ScreenPointToRay(Input.mousePosition), out hit, 200f))
{
//Did we hit a friendly unit?
if (hit.collider.gameObject.layer == friendlyLayer)
{
//Get the object we hit
FriendlyUnitController currentObj = hit.collider.gameObject.GetComponent <FriendlyUnitController>();
//Highlight this unit if it's not selected
bool isSelected = false;
for (int i = 0; i < selectedUnits.Count; i++)
{
if (selectedUnits[i] == currentObj)
{
isSelected = true;
break;
}
}
if (!isSelected)
{
highlightThisUnit = currentObj;
highlightThisUnit.ChangeMaterial(MaterialState.HighlightMaterial);
}
}
}
}
//Select units with click or by draging the mouse
void SelectUnits()
{
//Are we clicking with left mouse or holding down left mouse
bool isClicking = false;
bool isHoldingDown = false;
//Click the mouse button
if (Input.GetMouseButtonDown(0))
{
clickTime = Time.time;
//We dont yet know if we are drawing a square, but we need the first coordinate in case we do draw a square
RaycastHit hit;
//Fire ray from camera
if (Physics.Raycast(Camera.main.ScreenPointToRay(Input.mousePosition), out hit, 200f, groundLayer))
{
//The corner position of the square
squareStartPos = hit.point;
}
}
//Release the mouse button
if (Input.GetMouseButtonUp(0))
{
if (!usable)
{
return;
}
//here i need to exclude button presses
if (Time.time - clickTime <= delay)
{
isClicking = true;
Debug.Log("Screen Click");
}
//Select all units within the square if we have created a square
if (hasCreatedSquare)
{
hasCreatedSquare = false;
//Deactivate the square selection image
selectionSquareTrans.gameObject.SetActive(false);
//Clear the list with selected unit
selectedUnits.Clear();
//Debug.Log(" selectedUnits.Clear()");
//Select the units
for (int i = 0; i < allUnits.Count; i++)
{
FriendlyUnitController currentUnit = allUnits[i];
//Is this unit within the square
if (IsWithinPolygon(currentUnit.transform.position))
{
currentUnit.ChangeMaterial(MaterialState.SelectedMaterial);
selectedUnits.Add(currentUnit);
}
//Otherwise deselect the unit if it's not in the square
else
{
currentUnit.ChangeMaterial(MaterialState.NormalMaterial);
}
}
}
}
//Holding down the mouse button
if (Input.GetMouseButton(0))
{
//if (!usable)
//return;
if (Time.time - clickTime > delay)
{
isHoldingDown = true;
}
}
//Select one unit with left mouse and deselect all units with left mouse by clicking on what's not a unit
if (isClicking)
{
//Deselect all units
for (int i = 0; i < selectedUnits.Count; i++)
{
selectedUnits[i].ChangeMaterial(MaterialState.NormalMaterial);
}
//Clear the list with selected units
selectedUnits.Clear();
//Try to select a new unit
RaycastHit hit;
//Fire ray from camera
if (Physics.Raycast(Camera.main.ScreenPointToRay(Input.mousePosition), out hit, 200f))
{
//Did we hit a friendly unit?
if (hit.collider.gameObject.layer == friendlyLayer)
{
FriendlyUnitController activeUnit = hit.collider.gameObject.GetComponent <FriendlyUnitController>();
//Set this unit to selected
activeUnit.ChangeMaterial(MaterialState.SelectedMaterial);
//Add it to the list of selected units, which is now just 1 unit
selectedUnits.Add(activeUnit);
}
}
}
//Drag the mouse to select all units within the square
if (isHoldingDown)
{
//Activate the square selection image
if (!selectionSquareTrans.gameObject.activeInHierarchy)
{
selectionSquareTrans.gameObject.SetActive(true);
}
//Get the latest coordinate of the square
squareEndPos = Input.mousePosition;
//Display the selection with a GUI image
DisplaySquare();
//Highlight the units within the selection square, but don't select the units
if (hasCreatedSquare)
{
for (int i = 0; i < allUnits.Count; i++)
{
FriendlyUnitController currentUnit = allUnits[i];
//Is this unit within the square
if (IsWithinPolygon(currentUnit.transform.position))
{
currentUnit.ChangeMaterial(MaterialState.HighlightMaterial);
}
//Otherwise deactivate
else
{
currentUnit.ChangeMaterial(MaterialState.NormalMaterial);
}
}
}
}
}