//differ between path selection
void StartPath()
{
switch (pathType)
{
case PathType.standard:
pathMan = path.AddComponent <PathManager>();
pathMan.waypoints = new Transform[0];
break;
case PathType.bezier:
pathMan = path.AddComponent <BezierPathManager>();
BezierPathManager thisPath = pathMan as BezierPathManager;
thisPath.showHandles = true;
thisPath.bPoints = new List <BezierPoint>();
break;
}
}
//called whenever this inspector window is loaded
public void OnEnable()
{
//we create a reference to our script object by passing in the target
script = (BezierPathManager)target;
if (script.bPoints.Count == 0)
{
return;
}
//reposition handles of the first and last point to the waypoint
//they only have one control point so we set the other one to zero
BezierPoint first = script.bPoints[0];
first.cp[0].position = first.wp.position;
BezierPoint last = script.bPoints[script.bPoints.Count - 1];
last.cp[1].position = last.wp.position;
//recalculate path points
script.CalculatePath();
}
//bezier path placement
void PlaceBezierPoint(Vector3 placePos)
{
//create new bezier point property class
BezierPoint newPoint = new BezierPoint();
//instantiate waypoint gameobject
Transform wayp = new GameObject("Waypoint").transform;
//assign waypoint to the class
newPoint.wp = wayp;
//same as above
if (wpList.Count == 0)
{
pathMan.transform.position = placePos;
}
//position current waypoint at clicked position in scene view
if (mode2D)
{
placePos.z = 0f;
}
wayp.position = placePos;
wayp.transform.rotation = Quaternion.Euler(-90, 0, 0);
//parent it to the defined path
wayp.parent = pathMan.transform;
BezierPathManager thisPath = pathMan as BezierPathManager;
//create new array with bezier point handle positions
Transform left = new GameObject("Left").transform;
Transform right = new GameObject("Right").transform;
left.parent = right.parent = wayp;
//initialize positions and last waypoint
Vector3 handleOffset = new Vector3(2, 0, 0);
Vector3 targetDir = Vector3.zero;
int lastIndex = wpList.Count - 1;
//position handles to the left/right of the waypoint respectively
left.position = wayp.position + wayp.rotation * handleOffset;
right.position = wayp.position + wayp.rotation * -handleOffset;
newPoint.cp = new[] { left, right };
//position first handle in direction of the second waypoint
if (wpList.Count == 1)
{
targetDir = (wayp.position - wpList[0].transform.position).normalized;
thisPath.bPoints[0].cp[1].localPosition = targetDir * 2;
}
//always position last handle to look at the previous waypoint
else if (wpList.Count >= 1)
{
targetDir = (wpList[lastIndex].transform.position - wayp.position);
wayp.transform.rotation = Quaternion.LookRotation(targetDir) * Quaternion.Euler(0, -90, 0);
}
//position handle direction to the center of both last and next waypoints
//takes into account 2D mode
if (wpList.Count >= 2)
{
//get last point and center direction
BezierPoint lastPoint = thisPath.bPoints[lastIndex];
targetDir = (wayp.position - wpList[lastIndex].transform.position) +
(wpList[lastIndex - 1].transform.position - wpList[lastIndex].transform.position);
//rotate to the center 2D/3D
Quaternion lookRot = Quaternion.LookRotation(targetDir);
if (mode2D)
{
float angle = Mathf.Atan2(targetDir.y, targetDir.x) * Mathf.Rad2Deg + 90;
lookRot = Quaternion.AngleAxis(angle, Vector3.forward);
}
lastPoint.wp.rotation = lookRot;
//cache handle and get previous of last waypoint
Vector3 leftPos = lastPoint.cp[0].position;
Vector3 preLastPos = wpList[lastIndex - 1].transform.position;
//calculate whether right or left handle distance is greater to last waypoint
//left handle should point to the last waypoint, so reposition if necessary
if (Vector3.Distance(leftPos, preLastPos) > Vector3.Distance(lastPoint.cp[1].position, preLastPos))
{
lastPoint.cp[0].position = lastPoint.cp[1].position;
lastPoint.cp[1].position = leftPos;
}
}
//add waypoint to the list of waypoints
thisPath.bPoints.Add(newPoint);
thisPath.segmentDetail.Add(thisPath.pathDetail);
//add waypoint to temporary list
wpList.Add(wayp.gameObject);
//rename waypoint to match the list count
wayp.name = "Waypoint " + (wpList.Count - 1);
//recalculate bezier path
thisPath.CalculatePath();
}
