did implement it but cam still pointing to interest and not oriented by null orientation ... do I need to apply the positioning to the cam-root rather than to the cam itself ... so interest is dependent to cam ?
If you don't want to use the camera interest, you'd typically delete it. The camera's rotation is constrained by the interest, so setting its rotation has no effect as long as that constraint exists.
if I want to move ahead or behind the cone, how is this to be achieved ? I basically want to set the distance to keep to the cone ... distinguishing between ahead of the cone and running after the cone.
Instead of getting the Array Minimum, you would have to find the value that's closest to what you want. Let's say the distance values are 10, 20 and 30. You want the camera to be at a distance of 27. You would then have to find the value 30, because that's closest to your desired value of 27.
Instead of directly hooking the Distance Between Node into the Array Minimum, you would first SUBTRACT a scalar value (e.g. 27), then do an ABSOLUTE VALUE, then hook that into the Array Minimum.