LEGO Elements/Parts : 6573


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Special:	[DAT] (requires LDraw-compatible viewer)
Subject:	Re: Conditional lines on sloped wedge parts 43720 and 43721
Newsgroups:	lugnet.cad.dat.parts
Date:	Wed, 22 Sep 2010 12:48:20 GMT
Viewed:	20028 times

Ok so it’s been a few years, but I took another look at this. Did anybody ever make a twist primitive? It appears like all you need to do is something like this.

Very interesting!

I am not so much comvinced by the improvement for flat shading. Looks like we trade triangular artefacts in one direction with artefacts in the other one.

But it drastically improves the very ugly condlines artefacts!

Not sure there are so many parts that would benefit from this rectangular twisted primitive (apart from those mentionned in this thread), but it’s worth creating it nonetheless. Don, would you submit it to PT?

Philo

PS: Attached your code with triangles merged to quads (removes LDView artifacts in smooth shading) and condlines added. (I hope that ftx only messes up code in preview...)

0 // Begin 4 quadrant twist patch. 0 // Is each quadrant actually the same part? 0 // Scale down to 1x1 for reuse in other parts. 0 // Can break each quadrant into 4 parts for 0 // an even finer mesh. 4 16 10 20 0 11.25 15 20 5 10 0 3.75 15 -20 3 16 11.25 15 20 10 20 0 20 20 40 3 16 11.25 15 20 20 20 40 10 10 40 4 16 5 10 0 11.25 15 20 10 10 40 3.75 5 20 0 4 16 5 10 0 3.75 5 20 0 0 0 1.25 5 -20 3 16 3.75 5 20 10 10 40 0 0 40 3 16 3.75 5 20 0 0 40 0 0 0 0 3 16 1.25 5 -20 0 0 -40 0 10 -40 4 16 5 10 0 1.25 5 -20 0 10 -40 3.75 15 -20 3 16 1.25 5 -20 0 0 0 0 0 -40 0 3 16 3.75 15 -20 0 10 -40 0 20 -40 3 16 3.75 15 -20 0 20 -40 10 20 0 0 // End 4 quadrant twist patch. 0 0 // Added lines/Condlines 5 24 11.25 15 20 5 10 0 10 20 0 10 10 40 5 24 10 20 0 11.25 15 20 5 10 0 20 20 40 5 24 20 20 40 11.25 15 20 10 20 0 10 10 40 5 24 10 10 40 11.25 15 20 20 20 40 5 10 0 5 24 3.75 5 20 0 0 0 5 10 0 0 0 40 5 24 5 10 0 3.75 5 20 0 0 0 10 10 40 5 24 10 10 40 3.75 5 20 5 10 0 0 0 40 5 24 0 0 40 3.75 5 20 10 10 40 0 0 0 5 24 1.25 5 -20 0 0 -40 0 10 -40 0 0 0 5 24 0 10 -40 1.25 5 -20 0 0 -40 5 10 0 5 24 5 10 0 1.25 5 -20 0 10 -40 0 0 0 5 24 0 0 0 1.25 5 -20 5 10 0 0 0 -40 5 24 3.75 15 -20 0 10 -40 0 20 -40 5 10 0 5 24 0 20 -40 3.75 15 -20 0 10 -40 10 20 0 5 24 10 20 0 3.75 15 -20 0 20 -40 5 10 0 5 24 5 10 0 3.75 15 -20 10 20 0 0 10 -40

Message has 1 Reply:

		Re: Conditional lines on sloped wedge parts 43720 and 43721
(...) Unfortunately it messes up unless you inlude FTX line breaks, or fixed code box characters (pipe). Unfortunately, both make it harder for people using email or newsreaders, so probably best to do it as you did, browsers can just click "View (...) (14 years ago, 22-Sep-10, to lugnet.cad.dat.parts, FTX)

Message is in Reply To:

		Re: Conditional lines on sloped wedge parts 43720 and 43721 [DAT]
(...) Ok so it's been a few years, but I took another look at this. Did anybody ever make a twist primitive? It appears like all you need to do is something like this. Don 0 Wedge 4 x 2 Sloped Left 0 Name: 43721.dat 0 Author: Donald Sutter 0 (...) (14 years ago, 22-Sep-10, to lugnet.cad.dat.parts)

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