LEGO - Znap part mockups for Ldraw

I have build some ldraw mockup dat files of some Lego - Znap parts. I made these to be able to make some bridge models. Besides my wish to document some bridges I found on the web, I also wanted to supply some basic bridges for the LTrax project.

all pieces are mockups; 
- all pegs are simple boxes, 
- all beam ends are simplified, 
- some pieces have a simplified inner geometry

but all holes are in the correct places and all basic outer dimensions are exact enough to interact correctly with other Lego pieces and document a structure build of these Znap pieces. (example picture done with LdView, see other examples)

Piece Chart

Number	Peeron Description	Picture	File	workname	notes
32203	Znap Beam 7 3 Holes		32203.dat	zb3.dat
32204	Znap Beam 11 4 Holes 2 Bents		32204.dat	za4.dat
32205	Znap Beam 1/2 Circle Radius 2L		32205.dat	zc3.dat
32206	Znap Beam 9 5 Holes 4 Bents (Half-Octagon)		32206.dat	za5.dat
32208	Znap Beam 16 9 Holes 5 Bents		32208.dat	za9.dat
32213	Znap Grid 9 x 7 15 Holes		32213.dat	z15.dat
32214	Znap Beam 9 8 Holes Triangular		32214.dat	za8.dat	The little dent on the inside at the acute angle is missing.
32216	Znap Beam 16 14 Holes Curved		32216.dat	z14.dat	The curved part needs to be smoothed. This is why some inner edges are left missing. Also three details in the acute angle area are missing. Details.
32229	Znap Beam 16 7 Holes		32229.dat	zb7.dat
32230	Znap Beam 1/4 Circle Radius 8L		32230.dat	zc2.dat	Maybe more circle primitives should be used.
32242	Znap Beam ? 2 Holes 2 Bents		32242.dat	za2.dat
32246	Znap Beam  Curve 4 Holes small		32246.dat	zc4.dat
	I need numbers for these parts !				See this table for possible open numbers within the number range LEGO used for Znap. I might not have all information on this though.
322x1	Znap Beam 2 1/3, 1 Hole		x339.dat	zb1.dat
322x2	Znap Connector 2-pegs, 1 Hole		x336.dat	zcon2.dat	The details are missing.  Version using Tore's studz file:  zcon2t.dat
322x3	Znap Connector 4-pegs, with Square Center		x337.dat	zcon4.dat	The details are missing.  Version using Tore's studz file:  zcon4t.dat
				znapparts.zip	Zip-file including all files
	Pieces to be done
32218	Znap Beam Double Curve 4 Holes			z04.dat	(I haven't got a clue of the center points for the arcs)
322xx	Znap Connector 2-pegs w/ 2 counterroating pegs			zconm.dat	This piece needs to be done for some bridge designs. Might be the next piece I'll do.
32207	Znap Connector Offset Pegholes			zcona.dat
32221	Znap Connector 4 Tall with Axlehole			zconp.dat
32225	Znap Grid Motor Holder			zmh.dat
32219	Znap Wheel 32mm
322xx	Znap Large Wheel (68mm)
322xx	Znap Wheel 69mm Half

the naming system I used while making uses these:

• z all znap parts begin with a z
• b for straight beams
• a for angular beams
• c for curved beams
• con for connectors
• digits for number of holes or pegs 
  (some large pieces use 2 digits only)

I would also like to have some feedback on the naming of the subparts. So far I used these names:

	zpeghole.dat	-	peghole	Technic peg hole file used
	zendph.dat	-	endpiece next a peghole	This sub part can be easily replaced by a higher detailed one when this is made.
	zbtwph.dat	-	between pegholes (inner parts)	The wall dimensions were taken from technic pieces to make use of the 1-4cyli.dat and 1-4edge.dat primitives.
	zbtwph2.dat	-	with variations	Half of zbtwph to connect to zbtwph3b/c or zbtwphst.
	zbtwph3c.dat	-	- "-	This piece and the next piece use a wrong angle, this needs to be corrected. Piece zbtwph3c and zbtwph2 must be combined for this sub part. The curve edges of zbtwph3b could be written directly to the piece file, making one of the two versions obsolete. Details
	zbtwph3b.dat	-	- " -	This piece and the preceding piece use a wrong angle, this needs to be corrected.
	zbtwphst.dat			This piece seems to cause some trouble in LdView. Maybe there is a problem with how they are used in piece 32206.

As these sub parts are used by more than one piece I don't think a numbers only system would be correct.

Ok - here are some examples: 

• Picture of Piece 32216 (VRML version as seen in Blaxxun)
  
  
• This is the "Bricklink" version of the Znap bridge from the "Traindepot"
  
  
  • as Ldraw dat-file: bricklinkznapbridge.dat
    
    
  • as VRML file (132 kb): blnkgelb2.wrl (sorry for the blue connectors, but LD2VR won't map purple.)
    
    
  • as VRML file zipped (22 kb): blnkgelb2.zip
    
    
• Early picture with Povray of a bridge seen on Brickshelf. Look at the second picture on this page for a first experiment with Ltrax.
• More Bridges can be seen on this page.

To Do List

1. Solve the "wrong angle" problem with subparts zbtwph3b and zbtwph3c.
2. Redo the curve of piece 32216 and add the missing lines. 
3. Smooth curves where needed and replace with primitives where possible.
   
   - The next would change the "simple mocup" style to normal "unofficial piece" detail level.
4. Do the details of  connectors zcon2 and zcon4. 
5. Redo subpart zendph with all details.
6. Add the details near the acute angle of pieces 32216 and 32214.
   
   - This would make the pieces fit for the parts tracker
7. Delete all rotation commands left for editing. 
8. Delete unneeded comments and inline fragments left for editing.
9. Add type 5 lines and do BFC.
   
   - If I have enough time and nobody else volunteers I might go on from here.
10. Make pieces zconm and 32218.

Maybe some of the needed code is already done elsewhere, I would be happy to combine forces. If anybody wants to work on the pieces, by all means please do so and share the code. Anything done to get more Znap pieces on the parts tracker is appreciated.

t.woelk@web.de 
tw 20031002