domer1322 Posted August 1, 2013 Share Posted August 1, 2013 when I make an extrude along path (for instance, a road way curb/gutter) and the path is a curved NURBS or other curved line, the extrude shows up as a series of small straight line segments connected to form a curve. Is there a good way to make it look more curved without the straight segments and resultant corner points ? I've tried setting the VW preferences to show high resolution for 3D, but that doesn't cure it (but it makes it better than low resolution). PS: i still can't figure out how to attach an image to this forum. Quote Link to comment
taoist Posted August 1, 2013 Share Posted August 1, 2013 (edited) To attach an image use Win 7 Snipping tool. At the lower section, below the text/message box you will see File Manager. Click on File Manager. Click on Browse, select file Click on Add File Click on Done Adding Files See images Edited August 1, 2013 by taoist Quote Link to comment
mar schrammeyer Posted August 2, 2013 Share Posted August 2, 2013 Maybe try back/foreground render settings? Quote Link to comment
domer1322 Posted August 3, 2013 Author Share Posted August 3, 2013 Does anyone have an idea of how to reduce the 'segment' affect ? (I think I attached a file, but i can't tell from this window) Quote Link to comment
michaelk Posted August 3, 2013 Share Posted August 3, 2013 If that's an Open GL rendering, go to Open GL Options... and change the Detail to High or Very High. hth mk Quote Link to comment
domer1322 Posted August 6, 2013 Author Share Posted August 6, 2013 The attachment was a Renderworks "final" image that still has the segments. I'm still looking for help with this if anyone can tell me how to eliminate the segments in a curved extrude. Quote Link to comment
Bas Vellekoop Posted August 6, 2013 Share Posted August 6, 2013 (edited) Is not possible... Its a problem with the 'core' of Vectorworks and how it visualizes NURBS-curves. You can`t get it smoother... Had the same problem with eap, and asked at Vectorworks what to do. They said that you have to export the geometry and import it in Cinema4d. -export as IGS -import in cinema4d -import with a certains amount of U`s and V`s -Export as DXF -Import in Vectorworks.... Or you can reduce the controlpoint or split the different parts up in even more parts.... :sick: Edited August 6, 2013 by Buzz Lightyear Quote Link to comment
domer1322 Posted August 7, 2013 Author Share Posted August 7, 2013 thanks for the reply ... confirming my suspicions. I guess if I don't have Cinema 4D I'm out of luck. That's disappointing. I'm surprised this isn't a constant complaint ... it seems like a basic feature that is missing. Does everyone else just put up with the "segment" affect, or does everyone else just design things without curves ? Quote Link to comment
Kevin McAllister Posted August 7, 2013 Share Posted August 7, 2013 (edited) This doesn't hold true in my experience. There is an issue with Final Quality Renderworks, curve resolution and exporting to Cinema 4D I've seen. But in VW itself you should be able to get smoother geometry than in your example. Can you post a file with the geometry? I could only get similar results when rendering in Fast Renderworks. In Final Quality Renderworks things render smooth. Are you rendering in the Design Layers or in a Sheet Layer Viewport? Have you tried using Custom Renderworks which gives you the option to increase curve resolution? Kevin Edited August 7, 2013 by Kevin McAllister Quote Link to comment
Bas Vellekoop Posted August 7, 2013 Share Posted August 7, 2013 Its has to do with the length of the eap's and the amount of controlpoints of the path as well. I had a situation with the same problem, not as extreme but very noticeable as well. Quote Link to comment
domer1322 Posted August 8, 2013 Author Share Posted August 8, 2013 thanks for the help ... here is the offending object ... cut and pasted into a new file. Any suggestions ? Quote Link to comment
domer1322 Posted August 8, 2013 Author Share Posted August 8, 2013 I tried to reduce the length as buzz suggested ... that didn't help. (I used the split tool) I can't figure out a way to add vertexes without changing the shape. Quote Link to comment
domer1322 Posted August 8, 2013 Author Share Posted August 8, 2013 Kevin: I'm rendering in a design layer and a sheet layer .. same result. I tried the Custom Renderworks option, that had no affect (even though it had been set to "low" and i reset it to 'high") i sure would like to get the result as you posted in your image ... now I know it is possible .... Quote Link to comment
mar schrammeyer Posted August 8, 2013 Share Posted August 8, 2013 (edited) I thought I found the problem, I cannot replicate the kinks in a new file but when I try it in your file the lines are there. I used the polyline tool in bezier vertex mode to create the path in both files. Maybe someone in the higher echelons will see the problem Edited August 9, 2013 by mar schrammeyer Quote Link to comment
domer1322 Posted August 9, 2013 Author Share Posted August 9, 2013 Mar: thanks for the help, but I'm still puzzled. The segment you indicated clearly looks like individual line segments, but using the OIP and cycling through the vertexes, it shows they are all 2 degree nurbs curve vertexes. If they were lines, there would be a vertex at each corner point. I don't know what you mean by "a proper curve" . The geometry of this curve came from importing a dwg file. Is it possible there could be some hidden formatting or other issue left over from the translation ? Quote Link to comment
Benson Shaw Posted August 9, 2013 Share Posted August 9, 2013 (edited) Domer - This vexes me as well. Why should NURBS curves be faceted? But I was able to make this curb smoother by splitting the path into a few segments. I think BuzzLightYear & Kevin have it right, but apply the ideas together - use several shorter segments and Custom RW with Curve Geometry set to Very High. In Split Point mode, I isolated the sharpest part of the curb path with two cuts. The NURBS curves all became visibly smoother with each cut. Then made EAP for each segment of the path and rendered. FWRW is still pretty faceted Custom Renderworks with Curved Geometry set to highest, produces fairly smooth surfaces. I also tried OpenGL with highest detail, and anti aliasing is also fairly smooth. File attached. -B Edited August 9, 2013 by Benson Shaw Quote Link to comment
domer1322 Posted August 9, 2013 Author Share Posted August 9, 2013 Mar: OK ... I really do appreciate your advice .... thanks a lot. I am mostly satisfied with this now .... it is 'good enough' (I believe the saying goes .... "perfect is the enemy of 'good enough') There must be a software programming issue in this somewhere... I'm hoping someone at Nemetsheck will pick this up and fix it. Quote Link to comment
Kevin McAllister Posted August 9, 2013 Share Posted August 9, 2013 Benson, you really are the master of taming NURBS! KM Quote Link to comment
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