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RedMan77
Posts: 225
Registered: ‎08-11-2008
Message 1 of 7 (308 Views)
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Need help with Ceiling pattern with alternating distances - Is it possible?

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10-31-2013 07:31 AM

Can anyone please help with a ceiling pattern that is 2'-0" in the X but 2'-0" and then 2'-9" in the Y?  For the whole ceiling it alternates between 2'-0" and 2'-9".  I am going crazy trying to figure this  if its even possible.  Seems it should be too different than a brick pattern.  Trying to create an existing condition in the ceiling and I am coming up against this.  I know I could just draw lines but I am trying to avoid that.  Any assitance is appreciated.  Thanks in advance.

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rosskirby
Posts: 810
Registered: ‎04-08-2008
Message 2 of 7 (299 Views)

Re: Need help with Ceiling pattern with alternating distances - Is it possible?

10-31-2013 07:59 AM in reply to: RedMan77

Try using Hatch-22.  You can create your own hatch pattern.  Here's the link.

Ross Kirby
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Arcturis
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RedMan77
Posts: 225
Registered: ‎08-11-2008
Message 3 of 7 (285 Views)

Re: Need help with Ceiling pattern with alternating distances - Is it possible?

10-31-2013 08:41 AM in reply to: rosskirby

Tried that.  Keeps telling me the hatch pattern is too large and when I paste the results in text editor, it doesnt come close to what I need. 

 

 

Love that site.  I use the parameter jerk to import numerous parameters into a family at once.

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David_W._Koch
Posts: 2,419
Registered: ‎12-09-2003
Message 4 of 7 (238 Views)

Re: Need help with Ceiling pattern with alternating distances - Is it possible?

10-31-2013 06:59 PM in reply to: RedMan77

One line, repeated at a 2'-0" spacing will work for the 2'-0" offsets in the X-direction.  You will need two lines in the Y-direction, repeating at a 4'-9" offset each.  The origin of the second line needs to be 2'-0" in the Y-direction from the origin of the first line.  See attached file.

David Koch
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RedMan77
Posts: 225
Registered: ‎08-11-2008
Message 5 of 7 (218 Views)

Re: Need help with Ceiling pattern with alternating distances - Is it possible?

11-01-2013 07:58 AM in reply to: David_W._Koch

THANKS!!  I think I understand.  I know a little bit about dissecting the values in the pat file but his helps in a big way.  Just one question.  Where does the 4'-9" show up from your response in the file you uploaded.  Did you mean 2'-9"?  Thanks again.  Much appreciated.  Also wanted to thank  for your input as well.

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David_W._Koch
Posts: 2,419
Registered: ‎12-09-2003
Message 6 of 7 (205 Views)

Re: Need help with Ceiling pattern with alternating distances - Is it possible?

11-01-2013 10:33 AM in reply to: RedMan77

You wanted alternating spacings of 2'-0" and 2'-9".  The offset between members of the same "family" of lines is constant, so one line cannot be spaced at 2'-0" and 2'-9", so you need two parallel line definitions, with a 2'-0" separation in their origin points,  that are spaced at the total of the repeating pattern, which is 2'-0" + 2'-9" = 4'-9" (57 in the PAT file).

 

Each line in a hatch definition represents a "family" of lines.  The angle of the line is specified in the first field, then the X and Y values of the origin point are specified in the next two fields.  The X offset (offset along the length of the line, regardless of angle; only has meaning for a line that has a dash pattern specified) and the Y offset (offset between members of the family, perpendicular to the direct of the line, regardless of angle) are the fourth and fifth fields.  Optional fields defining pen-down segments (dashes - positive values) and pen-up segments (gaps - negative values) can follow.  For an RCP grid, the lines are continuous, so there are no optional dash fields in the file I attached.

 

The first line definition is

0,   0,0,   0,57

 

This creates a horizontal line (0-degree angle) with an origin at 0,0 that has an X-offset along the length of the line of 0 (no dashes, so any number would work) and a Y-offset perpendicular to the length of the line of 57 (4'-9"), so you would get a series of lines running horizontally, 57 units apart.

 

The second line definition is

0,   0,24,   0,57

 

This creates a second horizontal line with an origin at 0,24, putting it 24 units (2'-0") away from the first line.  Like the first line, it is continuous, so the X-offset is meaningless and set to 0; the Y-offset is 57 (4'-9"), so this creates a second series of lines that are 57 units apart and 24 units (2'-0") from the previous line of the first line definition and 33 units (2'-9") from the following line of the first defintion line, creating the alternating 2-0" and 2'-9" spacing.

 

The third line defintion is

90,  0,0,  0,24

 

Since the spacing of the pattern in the other direction is a constant 2'-0", one line is all that is needed.  The angle is 90, making it a vertical line, with an origin at 0,0.  There is no X-offset along the length of the line, but there is a Y-offset perpendicular between lines of the same family of 24 units (2'-0").

 

David Koch
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RedMan77
Posts: 225
Registered: ‎08-11-2008
Message 7 of 7 (197 Views)

Re: Need help with Ceiling pattern with alternating distances - Is it possible?

11-01-2013 11:17 AM in reply to: David_W._Koch

AHA!!!  Got it. Thanks for the clarification.  Makes total sense. You Rock!

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