topic How can I create a pat file (hatch) for this image? in Visual LISP, AutoLISP and General Customization Forum

How can I create a pat file (hatch) for this image?

tsui224567 — Sun, 15 Mar 2020 00:56:45 GMT

I have try the the introduction from youtube, but the error messages are always

existed. I don't know why. Does anyone can transform these pattern into code?

Re: How can I create a pat file (hatch) for this image?

hugha — Sun, 15 Mar 2020 06:06:51 GMT

Try this:

;-------------------------------------------------------------------------------
; Written by HatchKit Professional
; HatchKit Professional (c)1990-2019 Cadro Pty Ltd
; www.hatchkit.com.au/
;-------------------------------------------------------------------------------
;-Date : 2020-03-15
;-Time : 17:02:31
;-HatchKit Version : 3.1.11.2740
;-HatchKit Output Filetype : AutoCAD format
;-------------------------------------------------------------------------------
*Entities,DXF Entity Section
-90,0,149.63,49.8753,35,99.751,-0.2486
-90,15,149.63,49.8753,35,99.751,-0.2486
-0.02806264,0,49.875,12285.0,-0.28328495,15,-12340.0
-0.02806264,0,149.63,12285.0,-0.28328495,15,-12340.0

hth,

Hugh Adamson

Re: How can I create a pat file (hatch) for this image?

hak_vz — Sun, 15 Mar 2020 08:35:14 GMT

Here you have an excellent free code for generating hatch patterns (hatchmaker.lisp from Lanny Schiele).

You create your hatch element in real dimensions and cut it with a rectangle. After that scale it all to rectangle 1 × 1 unit. All lines should be on a grid 0.01 × 0.01 ( dimensions rounded to two decimals), and angles rounded to two decimals.

@hugha has provided a pattern that probably solves your current task, but using hatchmaker (lisp code) can help you to generate patterns you need. I'm using this code for many years and it helped me a lot. You just have to play with it to figure out how it works and how to use patterns it generates (appropriate scaling).

Re: How can I create a pat file (hatch) for this image?

Sea-Haven — Mon, 16 Mar 2020 05:41:14 GMT

Here is a pat for a floor tile closer to what you want if dwg in mm then scale is 1. The numbers should make sense.

*HT600x3003ET,600x300mm 3mm Free patterns from www.AUTOCADhatch.com
0,3,0, 0,603, 300,-3.0
0,3,3, 0,603, 300,-3.0
90,3,3, 0,303, 600,-3.0
90,0,3, 0,303, 600,-3.0