From Willy: Define a standard for helper parts

[Willy Tschager]

As the discussion has died down I made a summary of where the LSB has to agree upon:

Naming convention:

• Scheme: h<number>.dat
  
• Scheme: Helper<number>.dat
  
• Name as description without blanks: Helper3DEasyRotation.dat
  

Description:

As for the third party parts it starts with '|' or '~|'

• |Helper <2D/3D qualifier> <Type> <additional description> <lenght/height/depth>
  

<Type> Arrow, Dot, Line, Letter, Number, Light, LSynth Constraint, String Knot ...
<additional description> Straight, Rotation, "3", "F", Vertical
<lenght/height/depth> 2L, 3 Studs, 20 LDU, 10 mm

Note: It has to be decided if it is "Helpers" or "Helper".

Category:

Not needed. From the !CATEGORY and !KEYWORDS spec: If a part has no !CATEGORY meta-statement, the category is assumed to be the first word in the part name (ie. the first word of the first line of the part file).

Location:

• LDraw root LDraw\helpers
  
• Parts folder LDraw\parts
  
• Subfolder LDraw\parts\helpers
  
• Subfolder LDraw\parts\h
  

Note: It has to be decided if it is "helpers" or "helper".

Design:

• No edges on 2D helpers as for stickers
  
• Edges on 2D helpers as for parts
  
• Edges Yes/No on 2D helpers - leave the final decision to the author
  
• Edges on 3D helpers
  

Dimensions:

Numbers and letters should fit into a x-z grid of a:

• 20 x 20 LDU
  
• 40 x 40 LDU