Graphics Reference
In-Depth Information
// get waypoint position and 'flatten' it
nodePosition = currentWaypointTransform.position;
nodePosition.y=0;
The Unity function Vector3.Distance takes two Vector3 positions and returns the dis-
tance between them:
// check distance from this car to the waypoint
currentWaypointDist = Vector3.Distance(nodePosition,
myPosition);
When the distance in currentWaypointDist drops below waypointDistance, it incre-
ments currentWaypointNum, advancing to the next waypoint:
if (currentWaypointDist < waypointDistance) {
// we are close to the current node, so let's move
// on to the next one!
currentWaypointNum++;
When currentWaypointNum is greater than or equal to the number in totalWay-
points, we know that the player has been all the way around the track. This is not the
place to increase the lap counter, however, as the player needs to cross the start/finish line
before the lap may be increased. Instead, when the currentWaypointNum goes beyond
the total number of waypoints, the variable isLapDone is set to true, and the value of cur-
rentWaypointNum is set back to 0 ready to aim for the next waypoint (which is now the
first waypoint):
// now check to see if we have been all the way
// around the track and need to start again
if(currentWaypointNum>=totalWaypoints){
// completed a lap! set the lapDone flag to
// true, which will be checked when we go over
// the first waypoint (so that you can't
// almost complete a race then go back around
// the other way to confuse it)
isLapDone=true;
// reset our current waypoint to the first
// one again
currentWaypointNum=0;
}
The next part of the code will deal with the updating of the currentWaypointTrans-
form variable to reflect any changes to currentWaypointNum. Here the code calls upon
waypointManager.GetWaypoint() and stores the return value in the currentWaypoint-
Transform variable:
// grab our transform reference from the waypoint
// controller
currentWaypointTransform=waypointManager.GetWaypoint(currentWaypointNum);
}
