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steffen aarfing

Deriving solid from two polygons

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This is a recurring problem to me, sometimes working with objects in forced perspective:

I need to generate a solid object from two polygons, like extruding one shape to meet the other. It's not enough to do a tapered extrude. Is there any feature I have missed? alternatively, can I somehow stitch the missing surfaces to the objects, point by point?

I enclose a screenshot, the object that I used as a template is shown below. The two wireframe objects need to be top and bottom in the new object.

Steffen

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I don't know exactly but there is somewhere a tool to create a volume from

those shapes.

I think you have to convert the Polys to Nurbs first.

As for having some solids (!?) with missing faces or parts of it.

You have to convert the solid back to dumb mesh first.

In a mesh in edit mode you can draw 3D Polygons to fill holes

and missing or corrupt faces.

(Or delete some 2 point Polygons on edges)

After the mesh is valid again, you have to Push Pull one face

away to get a generic solid, and back again to get the original

geometry.

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Use the Loft Surface tool in the first mode (no rail mode). The two surfaces need to be converted to NURBS curves to start. It will help if they have a similar number of points. With the tool active select a related corner from each curve and hit return. In the dialog that comes up you can check the "Create Solid" checkbox to make a solid.

Kevin

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Thanks Kevin

It worked fine for a presentation, and once i get the number of points right, it might even look symmetrical :-)

The "Create Solid" box was also very helpful.

Remind me to show you the result one day...

Steffen

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Zoomer, it will not work on this problem, but I can't wait to try it out.From my days with FormZ, I soo miss to be able to grab any point on any model, and move it in any direction.

Bw

Steffen

Edited by steffen aarfing

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You may have better luck with Taper Face, if I am seeing this figure correctly.

[img:center]https://techboard.vectorworks.net/ubbthreads.php?ubb=download&Number=11571&filename=taper%20face%20attempt.PNG[/img]

The attached object was just a simple extruded horseshoe shape, with the inner face tapered with the bottom face as the anchor point.

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it occurred to me that "extrude along path"is another viable and quick method, which also gets you history in case you need to edit any of the base geometry.

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