(u,v) coordinates on a mesh

I've been asked about exporting a texture from 3ds Max as a Radiance pattern. I think this can be done with a "mesh" object, but I am unclear on the details. Has anyone done it and, if not, where in the code do I go to learn more?

···

--
Randolph

The established way seems to be to export to OBJ with UV texture
coordinates and use obj2mesh to convert it.

···

On Thu, Dec 8, 2011 at 6:51 PM, Randolph M. Fritz <[email protected]> wrote:

I've been asked about exporting a texture from 3ds Max as a Radiance
pattern. I think this can be done with a "mesh" object, but I am unclear
on the details. Has anyone done it and, if not, where in the code do I go
to learn more?
--
Randolph

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Radiance-general mailing list
Radiance-general@radiance-**online.org<[email protected]>
http://www.radiance-online.**org/mailman/listinfo/radiance-**general<http://www.radiance-online.org/mailman/listinfo/radiance-general>

try this,
http://web.mac.com/geotrupes/iWeb/Main%20site/RadBlog/3690C181-7F9F-43AD-B5B2-A5D239AD503E.html
hope it answer the question.
g

···

On 9 Dec 2011, at 00:55, Thomas Bleicher wrote:

The established way seems to be to export to OBJ with UV texture coordinates and use obj2mesh to convert it.

On Thu, Dec 8, 2011 at 6:51 PM, Randolph M. Fritz <[email protected]> wrote:
I've been asked about exporting a texture from 3ds Max as a Radiance pattern. I think this can be done with a "mesh" object, but I am unclear on the details. Has anyone done it and, if not, where in the code do I go to learn more?
--
Randolph

_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general

_______________________________________________
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[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general

Thanks.

Partly it does answer, but only partly. I'm unclear on how the Lu and Lv coordinates are mapped to the mesh geometry.

Maybe I'd better do more searching in the mailing list archives.

Randolph

···

On 2011-12-09 08:36:06 +0000, giulio antonutto said:

try this,
http://web.mac.com/geotrupes/iWeb/Main%20site/RadBlog/3690C181-7F9F-43AD-B5B2-A5D239AD503E.html

hope it answer the question.
g

On 9 Dec 2011, at 00:55, Thomas Bleicher wrote:
The established way seems to be to export to OBJ with UV texture coordinates and use obj2mesh to convert it.

On Thu, Dec 8, 2011 at 6:51 PM, Randolph M. Fritz <RFritz@lbl .gov> wrote:
I've been asked about exporting a texture from 3ds Max as a Radiance pattern. I think this can be done with a "mesh" object, but I am unclear on the details. Has anyone done it and, if not, where in the code do I go to learn more?
--
Randolph

_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general

_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general

_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general

--
Randolph

The (Lu,Lv) coordinates are extracted and interpolated from the vertex texture ('vt') coordinates in the .OBJ file. These are usually produced by the modeling system when the texture is applied. You can refer to the obj2mesh man page:

  http://radsite.lbl.gov/radiance/man_html/obj2mesh.1.html

-Greg

···

From: "Randolph M. Fritz" <[email protected]>
Date: December 13, 2011 10:12:30 AM PST

Thanks.

Partly it does answer, but only partly. I'm unclear on how the Lu and Lv coordinates are mapped to the mesh geometry.

Maybe I'd better do more searching in the mailing list archives.

Randolph

On 2011-12-09 08:36:06 +0000, giulio antonutto said:

try this,
http://web.mac.com/geotrupes/iWeb/Main%20site/RadBlog/3690C181-7F9F-43AD-B5B2-A5D239AD503E.html
hope it answer the question.
g

Hi Randolph,

Not quite sure what you are looking for, perhaps this is a good starting point though:

    http://www.radiance-online.org/pipermail/radiance-general/2003-October/001029.html

If I remember, Lu/Lv coordinates are mapped over a normalized space relating to the aspect ratio of the image being textured....

-Jack

···

--
# Jack de Valpine
# president
#
# visarc incorporated
# http://www.visarc.com
#
# channeling technology for superior design and construction

On 12/13/2011 1:12 PM, Randolph M. Fritz wrote:

Thanks.

Partly it does answer, but only partly.I'm unclear on how the Lu and Lv coordinates are mapped to the mesh geometry.

Maybe I'd better do more searching in the mailing list archives.

Randolph

On 2011-12-09 08:36:06 +0000, giulio antonutto said:

try this,

http://web.mac.com/geotrupes/iWeb/Main%20site/RadBlog/3690C181-7F9F-43AD-B5B2-A5D239AD503E.html

hope it answer the question.

g

On 9 Dec 2011, at 00:55, Thomas Bleicher wrote:

The established way seems to be to export to OBJ with UV texture coordinates and use obj2mesh to convert it.

On Thu, Dec 8, 2011 at 6:51 PM, Randolph M. Fritz <RFritz@lbl .gov > <mailto:[email protected]>> wrote:

I've been asked about exporting a texture from 3ds Max as a Radiance pattern. I think this can be done with a "mesh" object, but I am unclear on the details. Has anyone done it and, if not, where in the code do I go to learn more?

--

Randolph

_______________________________________________

Radiance-general mailing list

[email protected] <mailto:[email protected]>

http://www.radiance-online.org/mailman/listinfo/radiance-general

_______________________________________________

Radiance-general mailing list

[email protected]

http://www.radiance-online.org/mailman/listinfo/radiance-general

_______________________________________________

Radiance-general mailing list

[email protected]

http://www.radiance-online.org/mailman/listinfo/radiance-general

--

Randolph

_______________________________________________
Radiance-general mailing list
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D'oh!

I will Read The Fine Manual. :~)

Randolph

···

On 2011-12-13 18:27:56 +0000, Greg Ward said:

The (Lu,Lv) coordinates are extracted and interpolated from the vertex texture ('vt') coordinates in the .OBJ file. These are usually produced by the modeling system when the texture is applied. You can refer to the obj2mesh man page:

  http://radsite.lbl.gov/radiance/man_html/obj2mesh.1.html

-Greg

Thanks, yes, that does help.

Randolph

···

On 2011-12-13 18:35:15 +0000, Jack de Valpine said:

Hi Randolph,

Not quite sure what you are looking for, perhaps this is a good starting point though:
http://www.radiance-online.org/pipermail/radiance-general/2003-October/001029.html

If I remember, Lu/Lv coordinates are mapped over a normalized space relating to the aspect ratio of the image being textured....

-Jack
--
# Jack de Valpine
# president
#
# visarc incorporated
# http://www.visarc.com
#
# channeling technology for superior design and construction

On 12/13/2011 1:12 PM, Randolph M. Fritz wrote:
Thanks.

Partly it does answer, but only partly. I'm unclear on how the Lu and Lv coordinates are mapped to the mesh geometry.

Maybe I'd better do more searching in the mailing list archives.

Randolph

On 2011-12-09 08:36:06 +0000, giulio antonutto said:

try this,
http://web.mac.com/geotrupes/iWeb/Main%20site/RadBlog/3690C181-7F9F-43AD-B5B2-A5D239AD503E.html

hope it answer the question.
g

On 9 Dec 2011, at 00:55, Thomas Bleicher wrote:
The established way seems to be to export to OBJ with UV texture coordinates and use obj2mesh to convert it.

On Thu, Dec 8, 2011 at 6:51 PM, Randolph M. Fritz <RFritz@lbl .gov> wrote:
I've been asked about exporting a texture from 3ds Max as a Radiance pattern. I think this can be done with a "mesh" object, but I am unclear on the details. Has anyone done it and, if not, where in the code do I go to learn more?
--
Randolph

_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general

_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general

_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general

--
Randolph

_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general
_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general

--
Randolph