void OnSceneGUI()
{
// Creeation des ID
int arrowIDForward = GUIUtility.GetControlID("Arrow Forward".GetHashCode(), FocusType.Passive);
int arrowIDBack = GUIUtility.GetControlID("Arrow Back".GetHashCode(), FocusType.Passive);
// Recupere les variables utiles
TrackSegment track = target as TrackSegment;
Vector3 origin = track.GetControlPoint(0, Space.World);
Vector3 tangentForward = track.GetControlPoint(1, Space.World);
Vector3 tangentBack = origin * 2 - tangentForward;
Vector3 tangentDir = track.transform.forward;
// Creation du plane
Vector3 camUp = SceneView.lastActiveSceneView.camera.transform.up;
Vector3 pNormal = Vector3.Cross(tangentDir, camUp).normalized;
Plane draggingPlane = new Plane(pNormal, origin);
float newDistance = 0;
// Affichage des handles pour la tangente
bool changedForward = DrawTangentHandle(arrowIDForward, tangentForward, origin, tangentDir, draggingPlane, ref newDistance);
bool changedBack = DrawTangentHandle(arrowIDBack, tangentBack, origin, -tangentDir, draggingPlane, ref newDistance);
// Si un des handle est modifie on met a jour la distance
if (changedForward || changedBack)
{
Undo.RecordObject(target, "adjust bezier tangent");
track.tangentLength = newDistance;
track.RoadChain?.UpdateSegments();
}
}
