topic Re: hatch pattern by block in AutoCAD Forum

hatch pattern by block

Anonymous — Thu, 27 Sep 2018 20:26:44 GMT

Hi everyone,

we all know that is not possible to create a round pattern file (.pat) in autocad so I created this custom one (on the left) made it a block and then used it with the command "SUPERHATCH" to create a hatch on the figure on its right.

My question is, can i add this block to the hatch pattern we all have in the toolbar? so that i can use it whenever i need and on any drawing using the HATCH command?

Re: hatch pattern by block

Kent1Cooper — Thu, 27 Sep 2018 20:58:39 GMT

I don't think it's possible to get something to appear in the Hatch pattern choices that's not in an actual .pat-file definition. I suppose you could do a Tool Palette item or other menu entry that calls up SuperHatch with it.

But would it be acceptable to have the curves in that pattern made of small straight segments? I have, for example, a true Hatch pattern definition that makes this:

and I'm sure something pretty much exactly like your image could be constructed on similar lines, if it looks circular enough for you at the scale you would use. The inner "circles" in the patterns are actually dodecagons [12-sided], and the outer "circles" are 24-gons. They look pretty "round" until you Zoom in close enough to distinguish the edges.

Re: hatch pattern by block

jayhar — Fri, 28 Sep 2018 03:33:47 GMT

Hi,

Hatches an area using a selected image, block, xref, or wipeout object.

SUPERHATCH displays the SuperHatch dialog box click here

Please Mark the Post or Posts as Solution(s) to help others find the answer quickly. If your issue persists,

Please give me a bit more detail on this issue so we can continue to work towards getting this solved.

Thanks You
Jayhar.M.J

Re: hatch pattern by block

Irreb — Fri, 28 Sep 2018 13:24:42 GMT

Yes that would be acceptable but how do I set the pattern with so many lines? Is there a way to do it or to get it easier than writing it all "by hand"?

Re: hatch pattern by block

Kent1Cooper — Fri, 28 Sep 2018 17:33:15 GMT

@Irreb wrote:

Yes that would be acceptable but how do I set the pattern with so many lines? Is there a way to do it or to get it easier than writing it all "by hand"?

There are pattern-generating programs out there, though I find definitions generated by them sometimes to be far more complex than necessary, so I haven't used them [maybe someone will jump in]. But it might not be too hard to make that pattern starting with parts of mine as a basis. In order to give it a try, I need to know one thing: What is the ratio of the center-to-center spacing of the Circles in your image to their radius? It looks to be about 2.5-to-1, but I don't want to assume. And whatever it is, is it critical that it be exactly that? It may be that a definition can be much simpler with a ratio that's just-slightly different.

Re: hatch pattern by block

Irreb — Fri, 28 Sep 2018 17:40:00 GMT

It doesn't need to be perfectly like that, that superhatch has a rectangular shape and as we know hatches have a square base; so yes it is possible to change it and adapt it on the needs.

see attachment for the block.

Re: hatch pattern by block

hugha — Sat, 29 Sep 2018 04:57:23 GMT

Attached is a vector pattern (.PAT) definition constructed from trimmed overlapping polygons and exported via DXF to HatchKit.

Add it to any .DWG with the HATCH command.

hth,

Hugh Adamson

www.hatchkit.com.au

Re: hatch pattern by block

Anonymous — Thu, 04 Oct 2018 20:09:18 GMT

Hi All,

i managed to do everything using the lsp HatchMaker.lsp and modifying the grid (SnapUnit) it uses to make the script for the hatch.

thanks to all for your answers even if i didn't use them.

See attachment to see the lsp i used. be aware that you have to turn off your OSNAP (F3) and Polar Tracking (F10) checking to have activated the SNAPMODE to grip on the grid. If you don't do so the lsp won't get some lines because of the uncommon angles.