Earth Hatch Pattern [at a 45 deg angle]

[derek.96018]

Hello, I am trying to create the hatch pattern for the earth hatch that has the lines rotated at 45 degrees. Can someone help me with the code for it please ?

I know that the code for the typical hatch is as follows:
*EARTH, Earth or ground (subterranean)
0, 0,0, .25,.25, .25,-.25
0, 0,.09375, .25,.25, .25,-.25
0, 0,.1875, .25,.25, .25,-.25
90, .03125,.21875, .25,.25, .25,-.25
90, .125,.21875, .25,.25, .25,-.25
90, .21875,.21875, .25,.25, .25,-.25

I was able to get the angle to change, but basically know nothing about the rest of it. Thanks

[dkoch]

You certainly could write a pattern rotated at 45 degrees. In addition to changing the line angles (the first number, in degrees), you would need to change the second and third numbers, which represent the X- and Y-coordinates of the line origin. At 45 degrees, that introduces a factor of the square root of two over two, so the numbers will be messy and approximations at best. That can result in a breakdown in the pattern at large distances from the hatch origin.

An easier solution would be to use the already defined EARTH hatch pattern, and simply specify a 45-degree rotation when placing the hatch.

[hugh.69031]

Try this verion that has been rotated 45 degrees about the origin:

*EARTH45,Earth or ground (subterranean)
;-------------------------------------------------------------------------------
; Pattern written by HatchKit v2.7 Hatch Pattern Editor
; HatchKit v2.7 Hatch Pattern Editor(c) Cadro Pty Ltd 1990-2013.
; www.hatchkit.com.au
;-------------------------------------------------------------------------------
;-Template=EARTH, Earth or ground (subterranean)
;-Date =4/04/2013
;-Time =11:32:02 AM
;-------------------------------------------------------------------------------
45,-0.13258,0.13258,0.25,0.25,0.25,-0.25
45,-0.066291,0.066291,0.25,0.25,0.25,-0.25
45,0,0,0.25,0.25,0.25,-0.25
135,0,0.30936,0.25,0.25,0.25,-0.25
135,-0.066291,0.24307,0.25,0.25,0.25,-0.25
135,-0.13258,0.17678,0.25,0.25,0.25,-0.25


As mentioned above, the X and Y values have changed.
This pattern will, however, replicate indefinitely without roundoff error as any initial error in each element's X,Y location is simply passed along.

hth

[derek.96018]

Thanks for the reply's, the code worked great. For the record, I am aware that you can rotate the standard hatch in AutoCAD but I am using it to make the rotated hatch in Revit... of which I have not yet figured out how to do it there yet. Thanks again, Derek

[hugh.69031]

You can load the EARTH45 pattern as a Revit Drafting pattern without modification.
To load it as a model pattern you need to add a ;%TYPE=MODEL line to it (as described in the text file Revit.pat on your system):

*EARTH45,Earth or ground (subterranean)
;%TYPE=MODEL
;-------------------------------------------------------------------------------
; Pattern written by HatchKit v2.7 Hatch Pattern Editor
; HatchKit v2.7 Hatch Pattern Editor(c) Cadro Pty Ltd 1990-2013.
; www.hatchkit.com.au
;-------------------------------------------------------------------------------
;-Template=EARTH, Earth or ground (subterranean)
;-Date =4/04/2013
;-Time =11:32:02 AM
;-------------------------------------------------------------------------------
45,-0.13258,0.13258,0.25,0.25,0.25,-0.25
45,-0.066291,0.066291,0.25,0.25,0.25,-0.25
45,0,0,0.25,0.25,0.25,-0.25
135,0,0.30936,0.25,0.25,0.25,-0.25
135,-0.066291,0.24307,0.25,0.25,0.25,-0.25
135,-0.13258,0.17678,0.25,0.25,0.25,-0.25

- however you will find it is defined at just too small a scale to load at 1:1 scale as the repetition distance is just below the threshhold of acceptance:
http://www.hatchkit.com.au/faq_detail.php?id=7

Any scale above 1 will work, even 1.0000001 but you may want a scale that won't flood the hatched section, say 24 to gain a 1 foot repetition within the model.

Only Model patterns can be rotated in Revit - mouse hover and [TAB] to a line in your hatch, click to select then rotate.

hth, Hugh