How to create a custom hatch with an ARC or circle?

How to create a custom hatch with an ARC or circle?

mdallinga
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Message 1 of 5

How to create a custom hatch with an ARC or circle?

mdallinga
Explorer
Explorer

Hello guys,

 

need some advice on creating a custom hatch pattern consisting on an ARC/circle. Now I know one way of making custom hatch through making a notepad file and saving as .pat file and then importing in Autocad. But all the examples I saw online show pattern for only lines and not ARC/circles. I understand that a hatch pattern can contain only straight segments. But there must be a way to do it. I'm aware of the command SUPERHATCH, but that's not the one i'm looking for.

 

I have attached an image below of the ARC and what I want the hatch to be like. On the right I have drawn the ARC only using polylines, so that should work in a notepad file (in the attachment the .dwg). I just don't know how to write the code when I use so many polylines.

 

I hope someone can/will help me.

 

Cheers,

Maarten

 

mdallinga_1-1622809659067.png

 

 

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Message 2 of 5

Alfred.NESWADBA
Consultant
Consultant

Hi,

 

>> I understand that a hatch pattern can contain only

>> straight segments.

Sorry, you have found your answer, a hatch pattern can only contain lines and not arcs.

The best you can do is to convert your arc into a number of segmented lines and use it this way.

 

You might take a look to some free stuff like >>>this<<< (and I'm sure you'll find more samples).

 

- alfred -

------------------------------------------------------------------------------------
Alfred NESWADBA
ISH-Solutions GmbH / Ingenieur Studio HOLLAUS
www.ish-solutions.at ... blog.ish-solutions.at ... LinkedIn ... CDay 2026
------------------------------------------------------------------------------------

(not an Autodesk consultant)
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Message 3 of 5

pendean
Community Legend
Community Legend

While you wait... Explore this attached for how arcs are created with short straight segments.

 

HTH

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Message 4 of 5

Kent1Cooper
Consultant
Consultant

It's done as you surmise, as in portions of the middle and right pattern images >here<, or >this one<. If those are too kinky for you, it can be done with more segments, to look closer to real curvature, such as in the right side of >this<., or my CirclesTriGrid patterns >here<, which do this kind of thing:

Kent1Cooper_0-1622826814514.png

Those are actually 24-sided polygons.  It's certainly possible to take elements of how they are defined and make a pattern like your image.

EDIT:

Here's what your pattern would look like if made with portions of what would be 24-gons if they were complete "circles":

Kent1Cooper_0-1622827414871.png

Is that "curvy" enough for you?  It's only 9 segments per "arc," as compared to 21 in your drawing file.

 

Kent Cooper, AIA
Message 5 of 5

hugha
Collaborator
Collaborator
Accepted solution

Try the pattern contained in the attached file.

 

arc.png

 

 

the pattern was created directly from a WBLOCK'd  DXF of the seminal arc, arranged on a skewed mesh..

 

 

hth,

Hugh Adamson

www.hatchkit.com.au

 

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