Scene 51: Dynamic track between two points

[wallflower6]

Hi,

I just started using Curvy and it's been great so far!

I'm trying to build a moving object (eg. a vehicle) that has a reference to two transforms - a previous location and a next location, and is able to dynamically travel from the previous loc to the next loc (which can be changed dynamically, eg. through another script). 

I have tried extending Scene 51 by modifying the logic in the E51_InfiniteTrack.cs script to direct the vehicle to the next location's position (the following code is in the addTrack method). 

Code:

// Get localPosition of last control point of spline
Vector3 p = TrackSpline.ControlPointsList[TrackSpline.ControlPointCount - 1].transform.localPosition;

// Calculate direction towards nextTransform
Vector3 targetDirection = (nextTransform.position - p).normalized;

mDir = Vector3.Lerp(mDir, targetDirection, 0.5f);

Vector3 position = TrackSpline.transform.localToWorldMatrix.MultiplyPoint3x4(p + (mDir * CPStepSize));

It works fine, however, the vehicle kept starting its movement from (0, 0, 0). Since I need it to start from a specific point, I figured I needed to modify the start CP's Vector3.zero in the setup method. I changed this to the position of the specific start point and also modified mDir, ie.

Code:

Vector3 startPosition = initialTransform.position;
mDir = (nextTransform.position - previousTransform.position).normalized;

// Add the start CP to the spline
TrackSpline.InsertAfter(
    null,
    startPosition,
    true
);

However, the vehicle's movement becomes erratic, although it does start from the specified point. And after moving in a random direction, it often gets stuck / bunched up in one spot. I'm not sure if it's due to some issues with the mDir. 

Would appreciate any help, and thank you in advance!