topic Re: How do I code this hatch? in AutoCAD Forum

How do I code this hatch?

dhumbertXE4R3 — Wed, 02 Dec 2020 15:08:28 GMT

Hi everyone, I am tired of drawing individual lines and hatching in between them for this pattern. Does anyone know how to code this to create this pattern? This is basically a 1.5" wide board over a stucco finish that I use AR-SAND to fill in between. I have the code for the boards, but cannot figure out how to add the AR-SAND to the code without it filling the boards as well.

Here's the code for the boards:

Thanks!

Re: How do I code this hatch?

randyspear6624 — Wed, 02 Dec 2020 15:37:34 GMT

A dynamic block might be morer efficient for the purposes of others working with it too.

Re: How do I code this hatch?

Kent1Cooper — Wed, 02 Dec 2020 16:35:06 GMT

If you can bring yourself to lose one of the advantages of a Hatch pattern, you could EXPLODE the batten pattern, so its elements become the Lines you would otherwise have to draw, and then do the sand Hatching.

Re: How do I code this hatch?

dhumbertXE4R3 — Wed, 02 Dec 2020 17:18:48 GMT

Randy, would a DB allow for an irregular border?

Re: How do I code this hatch?

dhumbertXE4R3 — Wed, 02 Dec 2020 17:19:41 GMT

Kent, that is a good alternative idea if we cant get the hatch to work as I am envisioning.

Re: How do I code this hatch?

hugha — Thu, 03 Dec 2020 00:25:54 GMT

Try the attached pattern derived from a HatchKit Stretcher Brick QuickFill template set to create a randomly dotted 14.5" wide brick @ 16" centres, edited to an indefinite height.

hth,

Hugh Adamson

www.hatchkit.com.au

Re: How do I code this hatch?

Kent1Cooper — Thu, 03 Dec 2020 12:30:21 GMT

Here's something that uses AR-SAND's lineset angles and dot spacings as a starting point, massaged to leave the batten strips empty and further to look reasonably random. The not-quite-as-randomness of the look is because in order to not "bleed" into the batten strips, everything needs to have offsets that result in vertical alignments. I had to do four or five lines at each angle to do "groups" of dots, because of the limit of 12 specifications per line.

*StuccoBatten16, stucco random dots with 1.5" un-dotted vertical battens @ 16" 37.5, 1.5,0, 1.123,1.46352209, 0,-1.52,0,-1.7,0,-16.94755862 37.5, 5.25,0, 1.123,1.46352209, 0,-1.52,0,-1.7,0,-16.94755862 37.5, 9,0, 1.123,1.46352209, 0,-1.52,0,-1.7,0,-16.94755862 37.5, 12.75,0, 1.123,1.46352209, 0,-1.52,0,-18.64755862 7.5, 1.75,.25, 0.33795196,2.567, 0,-.82,0,-1.37,0,-13.94806337 7.5, 5,0, 0.33795196,2.567, 0,-.82,0,-1.37,0,-13.94806337 7.5, 8.25,-.25, 0.33795196,2.567, 0,-.82,0,-1.37,0,-13.94806337 7.5, 11.5,-.5, 0.33795196,2.567, 0,-.82,0,-1.37,0,-13.94806337 7.5, 14.75,-.75, 0.33795196,2.567, 0,-16.13806337 -32.5, 1.5,.5, -1.0690039,1.678, 0,-.5,0,-1.8,0,-16.62102476 -32.5, 4.75,.25, -1.0690039,1.678, 0,-.5,0,-1.8,0,-16.62102476 -32.5, 8,0, -1.0690039,1.678, 0,-.5,0,-1.8,0,-16.62102476 -32.5, 11.25,-.25, -1.0690039,1.678, 0,-.5,0,-1.8,0,-16.62102476 -32.5, 14.5,-.5, -1.0690039,1.678, 0,-.5,0,-18.42102476 -42.5, 1.15,.75, -2.45393488,2.678, 0,-.25,0,-1.18,0,-20.27146728 -42.5, 4.4,.5, -2.45393488,2.678, 0,-.25,0,-1.18,0,-20.27146728 -42.5, 7.65,.25, -2.45393488,2.678, 0,-.25,0,-1.18,0,-20.27146728 -42.5, 10.9,0, -2.45393488,2.678, 0,-.25,0,-1.18,0,-20.27146728 -42.5, 14.15,-.25, -2.45393488,2.678, 0,-.25,0,-21.45146728 90, .75,0, 0,16 90, -.75,0, 0,16

If you save it in a file by copy/paste, rather than using the attached one, remember to include the blank line at the end.

Re: How do I code this hatch?

dhumbertXE4R3 — Thu, 03 Dec 2020 13:08:49 GMT

These are some great suggestions, thanks everyone!

Re: How do I code this hatch?

randyspear6624 — Thu, 03 Dec 2020 15:11:27 GMT

Yes, that is one of the benefits to using dynamic blocks. I started putting one together but had difficulty using the dynamic array with the geometric constraints. Take a look at my screenshot, I think you'd need to replicate the batten/hatch (with the the constraints shown) to use as lookup/visibility objects. A little daunting if you've never used dynamic blocks but worth the exercise to learn.

I prefer not to create custom linetypes and hatches if I can.

The DB shown would do any trapezoid or triangular shape, you'd need to insert the block twice for anything more complex.

Re: How do I code this hatch?

hsarchitype1 — Sun, 02 Jun 2024 23:19:30 GMT

Hate to admit it but I am a 72 year old architect, self-taught AutoCAD user and still learning. I have spent a number of hours trying to create this code and yours worked. By studying your code I expect I will understand why it worked instead of what I saw on all the other forum posts.

My thanks,

Harry

Re: How do I code this hatch?

keishapillay7 — Sat, 10 May 2025 14:51:53 GMT

Hi I want to create a pat file/ code for a lotus flower hatch. Can anyone assist me with the code in notepad.

Re: How do I code this hatch?

Kent1Cooper — Sun, 11 May 2025 10:49:40 GMT

If you want actual curvature, investigate SUPERHATCH. Ordinary Hatch patterns can only be made up of straight-line pieces, so your curves would need to have kinks. The smaller the pieces and the greater the number of them, the closer the appearance to actual curvature, but also the more complex the definition.

Just as an example of approximating curvature with line segments, try any of the CirclesTriGrid... patterns in the file attached >here<. [Ignore the image -- download the file.] The "circles" are 24-gons. If something with that degree of kinkyness looks "circular" enough for your use, that would give a direction for defining your pattern, but it would be a very long definition. Greater allowable kinkyness would simplify the pattern; closer approximation to real curves would complicate and enlarge it.