Re: Braitenberg Vehicle Tutorial - "set-bias" related question

I am new to Breve and have been playing with the
Braitenberg Vehicle Tutorial.

I have a question regarding the set-bias function of
the vehicle.

The tutorial states that the set-bias function can be
used to "slow down" the vehicle speed by setting a
negitive bias on the Sensors.

Well, I am able to see this behaviour. But what I
noticed is the following :

When I use a negative bias of say -1.0, I notice that
the  Vehicle NO LONGER "gobbles up" the light source,
as it does when I use a positive bias to for the
sensors.

Is this expected behaviour or am I missing something.


Here is the modified code that I am using to run my
simulation.

TIA

BN


------ Included Code Segment -------------------

@use Braitenberg.

Controller myBraitenbergControl.            

BraitenbergControl : myBraitenbergControl {

    + variables:
        vehicle (object).
        leftSensor, rightSensor (object).
        leftWheel, rightWheel (object).
        light (object)
 
    + to init:
 
        light = new BraitenbergLight.
        light move to (10, 1, 0).
     
        vehicle = new BraitenbergVehicle.
        self watch item vehicle.
  
        leftWheel = (vehicle add-wheel at ( 0,0,
1.5)).
        rightWheel = (vehicle add-wheel at (0,0,
-1.5)).

            
        leftSensor = ( vehicle add-sensor at
(2.0,0,1.5)).
        rightSensor = (vehicle add-sensor at (2.0,0,
-.5)).
        
        leftSensor link to rightWheel.
        rightSensor link to leftWheel.
  
        leftWheel set-natural-velocity to 0.5.
        rightWheel set-natural-velocity to 0.5.

        leftSensor set-bias to -0.1.
        rightSensor set-bias to -0.1.

}
   
-------- End of code Segment --------------


		
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