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Alicia
Posted: Mar 4 2011, 08:56 AM
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What's the best way to obtain collision data? Are you only able to detect vehicles in the same lane ahead or behind? Can you detect if you side-swipe ambient traffic?

Thanks,
Alicia
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hstoner
Posted: Mar 9 2011, 08:07 AM
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Hello,

You can collect collision data by creating a time sensor in the SimCreator javascript file. Here is some sample code:

CODE

var CollisionSensor = new Scenario.TimeSensor("ts");
CollisionSensor.setStartTime(0);
CollisionSensor.setStopTime(0);
CollisionSensor.setCycleInterval(0.01667);
CollisionSensor.setCycle(true);

CollisionSensor.onActivate = function()
{
 var collision = Scenario.Subject.getCollision();
   
 
  if(collision.getTime()!=this.lastCollisionTime)
  {
    var refEntity = collision.getRefEntity();
    if (refEntity != null)
    {
     
     
     if (this.isColliding == false)
     {
     
      print("ran into " + collision.getRefEntity().name);
      print("time of collision " + collision.getTime());
      print("vel diff " + collision.getVelDiff());
      Visuals.displayText("ran into " + collision.getRefEntity().name,.01,.84,1,0,1,0,1,25,0,0,0,0);
      Visuals.displayText("time of collision " + collision.getTime(),.01,.82,1,0,1,0,1,25,0,0,0,0);
     Visuals.displayText("vel diff " + collision.getVelDiff(),.01,.80,1,0,1,0,1,25,0,0,0,0);
     
     }

    }
   this.isColliding = true;
   this.lastCollisionTime = collision.getTime();
   
  }
   else
   {
  this.isColliding = false;
   }
}


This will detect if there is any collision between the Subject vehicle and any moving model (Vehicle), moving character (Actor) and any moving object (StaticObject).
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Alicia
Posted: Mar 9 2011, 10:18 AM
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Thanks Heather,
I'm assuming the Visuals.displayText commands are printing to the screen and not to the data file?
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hstoner
Posted: Mar 11 2011, 08:09 AM
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Correct. You can do anything you want with that information.
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