UDSM1

Qualifying Scoring:

Zone / Clipping Scoring

1. Overview
   The overall output metric is designed to be easy to understand for a typical “fan”.
Zone score: X / 100
   To score the precision with which a vehicle fills a clipping zone, without bias toward chassis size.
   To achieve this, there are new zone scoring types (scoring / penalty), zone position types, and vehicle “lines” (aka polygons) which show the track area that the vehicle has occupied.
    

• Definitions
  Body Drift Line:
  This is the polygon drawn on the track surface representing the area that the body of the vehicle has occupied. Essentially a “box” drawn from the front bumper to the rear bumper, and along the side of the vehicle.
  
  This polygon’s size and shape are dependent on the vehicle’s angle.
  
  Large body vehicles (JZX, Mustang, etc.) produce a larger drift line when on angle than smaller body vehicles (AE86, ZN8, S13, etc.).
  
  A tolerance of 200 mm is added to the perimeter of the Body Drift Line.
  
  Wheelbase Drift Line:
  This is the polygon drawn representing the area in which the wheelbase of the vehicle has occupied. The wheelbase being the “box” from the front wheels to the rear wheels, taking into consideration track width, tyre size, etc.
  Wheelbase Drift Lines are given a tolerance of 200 mm.
  
   
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  Clipping Zone + Penalty sub-zone "No-Go Zone (NGZ)":
  Clipping zones are broken into two parts: a “Scoring” part and a “Penalty” part. Every clipping zone will have both.
  NGZs are placed on the outer edge of the clipping zone, dependent on the direction of the zone and movement of the driving line.
  The NGZ is a mirror of the clipping zone in terms of size and position, placed adjacent to the scoring zone.
  NGZs can be / should be virtual (i.e. not painted).
  Tracks will most likely be unable to draw these zones onto the track surface. Drivers and judges should be aware of the NGZ.
  The driving objective is to fill the scoring zone (with either the Body Drift Line or Wheelbase Drift Line) without entering the “No-Go” Zone.
  The percentage (%) in which the scoring zone is filled is the score for this zone.
  If the vehicle enters the NGZ, the percentage (%) in which this zone is filled is a deduction.
  
  This is a 1:1 proportionate decrease in scoring if a driver does not fill the zone completely or overshoots the zone.
  
  UDSM1’s focus is to reward drivers who fill the zone completely without overshooting it — i.e. rewarding precision positioning of the vehicle.
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  Zone position Types:
  There are four position types of zones, and they are scored differently depending on their type.

  
  1- Outer Zone. 
  These are zones on the outside edge of the track surface, where the rear of the vehicle is required to interact. This zone is not impeded by other objects such as walls or tyre stacks.
  
  
  2- Outer Zone WITH object.
  Same as above; however, a physical object exists which would prohibit the vehicle from freely overshooting the zone — such as walls or tyre stacks.
  
  3-Inner Zone
  These are zones on the inside edge of the track surface, where the front of the vehicle is required to interact. This zone is not impeded by other objects such as walls or tyre stacks.
  
  4-Inner Zone WITH object.

  Same as above; however, a physical object exists which would prohibit the vehicle from freely overshooting the zone — such as walls or tyre stacks.
  
   

1. Methodology
   Zones are filled with the vehicles WHEELBASE DRIFT LINE. The amount that this polygon interacts / covers the scoring zone will increase the score to a maximum of 100%. 
   If the Wheelbase Drift Line exceeds the zone, and enters the NGZ, the amount the NGZ is filled, is deducted from the score.
   Effectively, the driver needs to place their wheels (front or rear depending on the zone)  as deeply into the zone to achieve maximum points, without entering the NGZ.
   
   Zones WITH objects are filled with the vehicles BODY DRIFT LINE.  The amount that this polygon interacts / covers the scoring zone will increase the score to a maximum of 100%. If the BODY Drift Line exceeds the zone, and enters the NGZ, the amount the NGZ is filled is deducted from the score.
   Effectively, the driver needs to place their bumpers (front or rear depending on the zone)  as deeply into the zone to achieve maximum points.
   
   Why?
   Clipping zones with objects — such as walls — traditionally give a bias toward vehicles with short rear overhangs. Large body vehicles are physically unable to place wheels deeply into zones where objects exist.
   
   Clipping zones where there are no objects, which are sometimes scored using the vehicle’s body filling the zone, give a bias toward large body vehicles, as they do not need to place wheels as deeply into the zone to fill it.
   Using the wheelbase to fill the zone removes that bias.
   
   Total Zone score:  Sum of all zone scores / zone amount.
   
    

2. Examples
   
   Outer zone : Clipping Zone partially filled (34%) (Wheelbase Drift Line)
   Vehicle NOT deep enough into zone.
   Score:  34% 
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   Outer zone WITH Object :Clipping zone fully filled (100%), NGZ partially filled (42%)  (Body Drift Line)
   Wall (2x) Objects within Zone. Vehicle overshoots Clipping Zone and enters NGZ mid corner, incurring a 42% penalty.
   Score:  :100% - 42%     = 58%
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   Inner zone : Clipping Zone mostly filled (98%)
   (Wheelbase Drift Line)Vehicle deep  into zone.
   Score:  98%