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How would I create a checker pattern that wraps around a globe? I would
like the checker to alternate between latitude, longitude, etc. Thanks!
Mike
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Am 21.08.2015 um 06:19 schrieb Mike Horvath:
> How would I create a checker pattern that wraps around a globe? I would
> like the checker to alternate between latitude, longitude, etc. Thanks!
"Checker pattern and a spherical warp" would be my first thought.
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
Le 21/08/2015 07:04, clipka a écrit :
> Am 21.08.2015 um 06:19 schrieb Mike Horvath:
>> How would I create a checker pattern that wraps around a globe? I
>> would like the checker to alternate between latitude, longitude,
>> etc. Thanks!
>
> "Checker pattern and a spherical warp" would be my first thought.
>
sphere { 0,av_ra
texture {
checker texture { pigment { color rgb <1,1,0> } },texture { pigment
{color rgb 0.5} }
scale 1/4 warp { spherical orientation y } } }
you can adjust the frequency of alternating by tuning the scale 1/4 to
your need, even with a non uniform scale.
av_ra is the radius of your globe.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2
iJwEAQEIAAYFAlXWtO8ACgkQhKAm8mTpkW08CwQArMiLp2P1MnvfGZku14Ajnc3m
MjdceqGAAKPAyUJAm55d1trNbovtY5rnSpGNgMljji5ruI92Eq85ti9S7hCcXTK0
WTjN16Tcjhs5kljCkMVdoYTQNhe9eB55kY4V8BzUrNfoKiCCV/wvYvw/BC7Y0nXZ
FSQZnqlXqqVo/8C/Tjc=
=7G3o
-----END PGP SIGNATURE-----
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I forgot I did this once before for an object collection item. I ended
up copying the code and re-using it.
#declare latitude_pigment_1 = pigment
{
radial
color_map
{
[0.5 color srgb <040,066,018>/255]
[0.5 color srgb <067,084,029>/255]
}
frequency longitude_div/2
}
#declare latitude_pigment_2 = pigment
{
radial
color_map
{
[0.5 color srgb <067,084,029>/255]
[0.5 color srgb <040,066,018>/255]
}
frequency longitude_div/2
}
/*
#declare radius_pigment = pigment
{
function {f_r(x,y,z)}
pigment_map
{
[0 color srgb 1/2]
[1 latitude_pigment_1]
}
}
*/
#declare longitude_pigment = pigment
{
function {f_ph(x,y,z)/pi}
pigment_map
{
[0.5 latitude_pigment_1]
[0.5 latitude_pigment_2]
}
frequency longitude_div/4
}
#declare checker_sphere_pigment = pigment {longitude_pigment}
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From: Nekar Xenos
Subject: Re: Latitude, longitude, radius pattern?
Date: 22 Aug 2015 01:15:30
Message: <op.x3q7jxcnufxv4h@xena>
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On Fri, 21 Aug 2015 07:37:17 +0200, Mike Horvath <mik### [at] gmail com>
wrote:
> I forgot I did this once before for an object collection item. I ended
> up copying the code and re-using it.
>
> #declare latitude_pigment_1 = pigment
> {
> radial
> color_map
> {
> [0.5 color srgb <040,066,018>/255]
> [0.5 color srgb <067,084,029>/255]
> }
> frequency longitude_div/2
> }
> #declare latitude_pigment_2 = pigment
> {
> radial
> color_map
> {
> [0.5 color srgb <067,084,029>/255]
> [0.5 color srgb <040,066,018>/255]
> }
> frequency longitude_div/2
> }
> /*
> #declare radius_pigment = pigment
> {
> function {f_r(x,y,z)}
> pigment_map
> {
> [0 color srgb 1/2]
> [1 latitude_pigment_1]
> }
> }
> */
> #declare longitude_pigment = pigment
> {
> function {f_ph(x,y,z)/pi}
> pigment_map
> {
> [0.5 latitude_pigment_1]
> [0.5 latitude_pigment_2]
> }
> frequency longitude_div/4
> }
> #declare checker_sphere_pigment = pigment {longitude_pigment}
I was going to post something similar to this, but with a gradient map for
the longitude pigment. Yours is more accurate anyway.
--
-Nekar Xenos-
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