Faces Won't Make
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Can anyone tell me what's going on with this file? I'm tracing from a .tiff, and a couple places I have had trouble making a face.
I'm tracing the lines on the surface of the .tiff, best I can tell. I make a connection that closes a polygon and most times the face occurs. A couple times it hasn't, so I retrace the polygon. Still no face. I start making triangles. The opening I'm referring to is in the right bottom of the figure, and as you can see it is inside a triangle. As I keep tracing in the triangles, it should close up but it doesn't.
Further, when it's reduced to a small triangle and I cut across an internal line, what had been a face is eliminated in one section. Play with it and see if this happens to you, and if you have a sense of why.
Thanks,
Jim
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In mode wireframe, seems your drawing is some curious
Some lines are broken, missing etc...
So you must make some repairs
As your model is symmetric make just a module then copy / repeat/ mirror
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Frenchy, thank you for the beautiful links. This is part of a Tabernacle for a Catholic church, patterned after America's mission churches of the American southwest. They in turn were designed with an eye to 16th century Spain, with its Moorish, Roman (Renaissance) and early Baroque architecture.
We were inspired by the muquara in one of your links, Masjid-i-Shykh, but saw similar details around sculpted doors in many photos. Watching one being drawn explains a lot, but not the biggest mystery: how can you conceive of such a beautiful, complex three dimensional sculpture/architecture? The time to execute is staggering. The effect of the finished piece, at least in photos, is so soft and mossy, so unlike anything I know of plaster.
On the drawing: I'm not sure why things are so chopped up. I took out some crossing lines, and patched a couple of holes caused by offsetting halves of a semicircle, but even given that it came out ragged.
The part I was having trouble with was different. I outlined a triangle several times and it did not close. As a triangle, it was by definition planar. On close inspection I could find no holes or doubled vertices. Weld could not find faces. By working triangles in, it finally filled.
Weirder still, when I'd reducted it to a small triangle I extended a line across it, across an edge and the filled face beyond. When it attached to the next line, part of the filled face disappeared instead of the opening getting smaller. What could cause such an effect?
Thanks for your comments,
Jim
Curiously, when triangulating, if I drew a line across an existing triangle and extended it across a filled face to the next line, part of the filled face disappeared making the hole larger. This is the problem I was asking about. There were two areas like this on the drawing, mirrors of each other.
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Another thing can help when you modelize
use the Style "Color by Axis"
So horizontals, verticals, perpendiculars will be ever good
(click image if scroll bars)
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jim
Update to your model and comments
After looking at your model found and corrected a couple of other areas and removed all the stray lines ( 53 of them). Some comments for you:- Use of the triangles to correct can be done but I usually do that as a last resort approach. There are a number of plugins that can help;
- Stray lines at Smustard. It allows one to remove or label them and will quite often show the areas in your model preventing surface formation. http://www.smustard.com/script/StrayLines;
- Under windows/preferences/extension select utilities. This will give a create face utility in the tools drop down (utility/ create face). If you select the bounding edges and run this it will respond with a reason if it cannot.Not 100% accurate though
There are a number of others but #1 is the one I find most useful - Pilou recommendation is a definite must but, for your case with all the off axis lines it does not help a lots. For on axis rectilinear models ( house etc) it really helps
Many of your problems are caused by molder errors so make max use of the SU inference engine and when you have a problem stop and fix. Other wise they grow exponentially. Your use of layers is questionable. SU layers are used onlyfor visibility control and not geo separation. I put all back on layer 0. Make components for geo seperation and then use layers for visibility control of those. http://www.youtube.com/watch?v=fBdP499iw0Y
good Luck
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Jim
unless I have the wrong spot my suggestion is:- turn hidden geo on;
- Use line tool and green inference to extend lines from bottom circle edges to the top face, use green inference;
- Connect the top edges and your faces will form. They did for me
Attachment removed by mac1 9-2-01
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