Topic: Lisp to change layer colors....

[cyclops]

The swamp,
I am looking for a LISP routine that will change a group of layers colors by a value of X.

Let say, the layer group *V-UTIL-* has a color value(s) of X, the LISP command will evaluate the color value each layer in the layer group, then bump the layer color value by a constant value (positive or negative).

For example
BEFORE
Layer                Color
v-util-strm          11
v-util-sswr          13
v-util-watr          15

AFTER
Layer                Color
v-util-strm          13 or 09
v-util-sswr          15 or 11
v-util-watr          17 or 13

Thanks for the help in advance.
Cycl^Ops

[Lee Mac]

Try the following:

Code - Auto/Visual Lisp: [Select]

1. (defun c:laycolshift ( / int pat )
2.     (if (and (setq pat (strcase (getstring t "\nSpecify layer name pattern: ")))
3.              (setq int (getint "\nSpecify colour shift: "))
4.         )
5.         (vlax-for lay (vla-get-layers (vla-get-activedocument (vlax-get-acad-object)))
6.             (if (wcmatch (strcase (vla-get-name lay)) pat)
7.                 (vla-put-color lay (max (rem (+ int (vla-get-color lay)) 256) 1))
8.             )
9.         )
10.     )
11.     (princ)
12. )
13. (vl-load-com) (princ)

For your example, you would enter v-util-* and plus or minus 2 at each respective prompt.

[cyclops]

Lee,
I will try this out.
Thanks
Cycl^Ops