public void followPath(List <int> path, WARGrid grid)
{
// make sure the source isn't highlighted
grid.GetCell(path[0]).highlighted.Value = false;
// if we are in the middle of walking a path
if (pathRoutine != null)
{
// stop the previous routine
StopCoroutine(pathRoutine);
}
// start walking the path
pathRoutine = walkPath(path, grid);
StartCoroutine(pathRoutine);
}
private IEnumerator walkPath(List <int> path, WARGrid grid)
{
// the last cell we saw
var lastCell = path[0];
foreach (var cell in path.Skip(1))
{
// the source and target cells
var source = grid.GetCell(lastCell);
var target = grid.GetCell(cell);
gameObject.transform.LookAt(target.transform.position);
// move between this cell and the next
yield return(moveBetweenCells(source, target, grid));
// make sure we move between this cell next time
lastCell = cell;
}
// we're done with our coroutine
pathRoutine = null;
}
// coroutine to move object between cells
private IEnumerator moveBetweenCells(WARActorCell source, WARActorCell target, WARGrid grid)
{
// the moment in time along the path between the two cells
var i = 0.0f;
// the amount to move per tick
var rate = 1.0f / speed;
// if the cell and the target are the same then we're done
if (source == target)
{
yield break;
}
// make sure the current cell highlighted
lastCell = grid.GetCell(grid.findCellsUnderObject(this)[0]);
lastCell.highlighted.Value = true;
// until we reach the end
while (i < 1.0)
{
// increment the distance counter to the next tick
i += Time.deltaTime * rate;
// raycast to find the cell under us
var currentCell = grid.GetCell(grid.findCellsUnderObject(this)[0]);
// if the cell is different from the last one we saw
if (lastCell.id != currentCell.id)
{
// unhighlight the last cell
lastCell.highlighted.Value = false;
// and highlilght the one we are under
currentCell.highlighted.Value = true;
// add ourself to the new cell
grid.addObjectsToCell(currentCell.id, new List <WARGridObject> {
this
});
// remove ourself from the old cell
grid.removeObjectsFromCell(lastCell.id, new List <WARGridObject> {
this
});
// update the cell tracker
lastCell = currentCell;
}
// update our position to the appropriate part of the lerp
gameObject.transform.position = Vector3.Lerp(
source.transform.position,
target.transform.position,
i
);
// we're done for this tick
yield return(null);
}
}
