Hatching a surface

[Javier_FQ (Javier)]

Hi¡

I was triying to apply (in a fast way) a hatch to a surface triying to get a nice 2d drawing…is there a fast way to do that? I know how to create UV from a surface, then hatch it, and then applycurve or flow along surface will work but i see it pretty complex, and i should do that with a lot of surfaces . Does anyone know a plugging or an easy way to do that? I have try also VisualArq but is only for the section of surfaces.

Thanks in advance¡

[Javier_FQ (Javier)]

Please, does anyone know how I could do that? I would like to do a perspective view and add multiple hatchs for the curve surfaces in the view!

[pascal (Pascal Golay)]

Hello - you might try Make2D and then add the hatches to the regions after the fact, on the 2d curves.

-Pascal

[Javier_FQ (Javier)]

But this way pascal the hatchs would be ‘flat’, i would like that they will follow the surface. Something similar to this.

Thanks for your answer @pascal

[Holo]

Hatches are 2D only, so if you want a 3D effect then either apply a texture with a matching UV projection, or project curves onto the 3D shape.

[Javier_FQ (Javier)]

Yeap but this process is going to be too long @Holo, in other sortwares is much easier and consumes less rosurces…i thought to do a grasshopper definition but the file will be too heavy cause i have to explode the hatchs and then apply them as curves

[John_Brock]

Rhino does not currently have a tool to “decorate” a surface like you described. The texture suggestion or hatching a flat Make2D illustration as described above are all I can think of.

[callum]

Hello! I have the same problem, was wondering if you’d be so kind as to clarify what I’d need to do to achieve it with the texture/UV projection please? Cheers

[weest]

actually it’s not just decorating, there are many useful things you could do with such a feature, for example make a curved fence…(thats what i am working on at the moment…) cheers

[martinsiegrist]

Curved fence… You can do that with Grasshopper very efficiently

[weest]

even tough i know a little grashopper i do not have the slightest idea how i would do that…
(the fence is supposed to be made of a (steel)net…

[martinsiegrist]

Why don’t you post an image of an example or draw a sketch?

[weest]

hi–meanwhile i did a little dirty hack on this:
exploded hatch into lines(curves) and then used pull curves to (help)surface to get the desired effect.
for me this is sufficiently correct, since i need the (rendered) views only as a working model(not for presentation) to develop my design…

[weest]

the staicase is elliptical…at the landing the inner ellipse merges into an arch(i could not simplify it any better…)

[lakoor (Gregory Kogan)]

Thank you. I use this method and it works. Do you have some idea how to apply solid hatch to curved surface?

[drakeschaefer1]

Posting for anybody who might stumble upon this thread looking for an answer. While you can’t hatch a 3D Surface, you can cheat the effect pretty easily. Duplicate the face you want to hatch and unroll or smash the surface to create a planar surface. You can hatch that surface, explode the hatch into individual lines, group them together, and use FlowAlongSrf to match back to the original surface.

This technique works flawlessly on single-curved surfaces, however, double-curved surfaces are much trickier. The second image is the result of using the method without adjustments. In the third image, I unrolled the end of the flattened cone, and height to create a rectangle to hatch. Then I flowed that onto the surface, and then I could FlowAlongSrf on the original surface. As you can see the resulting texture is better mapped to the surface, although rotated in this example.