Round table cloth anywhere?

DoctorJellybean · September 11

I'm after a round table cloth to use for a restaurant round table. It should be either dForce enabled, or able to apply a dForce modifier to sim.

Thanks in advance.

WendyLuvsCatz · September 11

Y scaled down sphere cut in half using the Geometry editor wouldn't work?

DoctorJellybean · September 11

Oh, never thought of that.

jmucchiello · September 11

Don't forget to use a high Divisions value so the Dynamic dForce modifier will work. (I always end up using 1 and wondering why dForce isn't working.)

DoctorJellybean · September 11

It doesn't seem to work for me, I'll have to try something else.

barbult · September 12

What part isn't working? What happened when you tried? Try a plane with a circular opacity map to get more even mesh quads for dForcing. You could use the Geometry Editor capability to rotate triangulation of selected polygons to improve draping smoothness.

WendyLuvsCatz · September 12

while I haven't tried a tablecloth, I have made many circular skirts from edited DAZ sphere primitives

you cannot edit it after making it a dynamic object though, if you do, you will need to remove that and reapply

and yes, load the primitive with lots of sections and divisions

jmucchiello · September 12

barbult said:

What part isn't working? What happened when you tried? Try a plane with a circular opacity map to get more even mesh quads for dForcing. You could use the Geometry Editor capability to rotate triangulation of selected polygons to improve draping smoothness.

It might be helpful if you also posted the before primitive in wire view.

barbult · September 12

It is just a Daz primitive plane. I think I created it 2 or 3 Meters on a side and 100 divisions. I rotated the triangulation of two quadrants so all quadrant triangulation aimed toward a plane corner. There was a Daz tutorial on that technique when dForce was introduced. I can't add any images tonight. My computer is shut down and I have only my phone.

DoctorJellybean · September 12

Thank you for all your suggestions, I figured it out.

barbult · September 12

jmucchiello said:

It might be helpful if you also posted the before primitive in wire view.

Here is a top view screenshot of the primitive plane with my circular opacity map, a blue viewport background, and the Triangulation Wireframe Opacity increased in Draw Settings.

richardandtracy · September 12

Did the triangles help it drape? Otherwise it seems to be a step not altogether needed. Always wanting to learn. Regards, Richard.

felis · September 12

The way the triangles is orientated can help it drape better, more smoothly.

But this is a fairly dense mesh, so noy sure how much it would change.

Richard Haseltine · September 13

Traingulating can help, but you can control how DS triangulates to mimic the way that the two diagonally oposite quadrants have the same direction of split and the adjacent quadrants the opposite by using the right-click>Geometry Editing>Rotate Triangulation... command with the Geoemtry Editor on the selsected quadrants, which avoids doubling the working polygon count.

barbult · September 13

felis said:

The way the triangles is orientated can help it drape better, more smoothly.

But this is a fairly dense mesh, so noy sure how much it would change.

It might not add much for this density. I don't have any evidence one way of the other. I didn't try without the triangulation rotation, because with it was my best chance for success. It is very easy to do the triangulation rotation on a plane like this, so I just did it.

richardandtracy · September 13

Will have to try it myself. My main focus tends to be de-triangulation to get rid of pointy ones that are created by SolidWorks during the conversion to .stl when moving a model to DS. In some ways it seems nuts to deliberately introduce them. Regards, Richard.

barbult · September 13

richardandtracy said:

Will have to try it myself. My main focus tends to be de-triangulation to get rid of pointy ones that are created by SolidWorks during the conversion to .stl when moving a model to DS. In some ways it seems nuts to deliberately introduce them. Regards, Richard.

The Geometry Editor Triangulation Rotation won't de-triangulate.

richardandtracy · September 13

I know. I have written a de-triangulation method in my modeller to attempt to deal with pointy triangles. It usually, frequently, mostly works. The way it determines the angle between facet normals needs improvement as it sometimes merges facets into a quad where the triangle normals are at 90degrees to each other, leading to a seriously warped quad and strange looking edge in DS. Regards, Richard

Eustace Scrubb · September 13

Why not flatten a cone, so that the triangles are all pointed towards the center? Or would that be too regular a drape, as even round tablecloths are generally cut from square-woven fabrics?

ed3D · September 13

And this + dont know the number of Subdivides And kind of File Types ?? Thanx

made with Blender 279b

DoctorJellybean · September 13

ed3D said:

And this + dont know the number of Subdivides And kind of File Types ?? Thanx

made with Blender 279b

Thank you!

I'll gladly try it out.

ed3D · September 13

DoctorJellybean said:

ed3D said:

And this + dont know the number of Subdivides And kind of File Types ?? Thanx

made with Blender 279b

Thank you!

I'll gladly try it out.

.. you're more than welcome /

jmucchiello · September 13

I knew I'd seen a resource: https://www.daz3d.com/sy-morphing-primitives-and-merchant-resource

5th row, item 1 is dForce round cloth. Next to it is square cloth.

DoctorJellybean · September 14

jmucchiello said:

I knew I'd seen a resource: https://www.daz3d.com/sy-morphing-primitives-and-merchant-resource

5th row, item 1 is dForce round cloth. Next to it is square cloth.

A lot easier, thank you.

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Round table cloth anywhere?

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