Help me with a conversion

[bart]

It does or it doesn't run correctly.
I don't see the threads on your jpg.

Did you connect it to the blinn1SG in the displace slot of the mental ray tab?

Because I did not put an 'apply' command in the mi declaration file, the shader will show up in the Misc category.

[bart]

Also, I'm no expert on compiling on Windows with visual C++.

But you need to use the shader.lib file that comes in the Maya mental ray devkit. This is referenced in the Maya documentation section named:
Use a custom-made mental ray for Maya shader in Maya.

[bart]

So I put 'apply displace' into the mi file, and it now appears under the mental ray displacement shaders category.

declare shader
scalar "threads" (
scalar "Km" default .1,
scalar "frequency" default 5.0, #: default 10.0
scalar "phase" default 0.0,
scalar "offset" default 0.0,
scalar "dampzone" default 0.05
)
#: nodeid 101
apply displace
version 1
end declare

Also, note the little #: I put in after frequency. In the Maya doc, you can see how to add 'comment commands' with this syntax to affect how the AE presents the parameter. In the above case, I'm actually overriding the default. But there are other things that let you affect the slider.

And if you are going to be using this shader for a while, in other words, you take it out of R&D, you should assign it a nodeid.

[bart]

BTW, my pic:

[img]http://www.lamrug.org/resources/images/threads1.jpg[/img]

[bart]

To switch u(s) and v(t) directions you can switch them in the code, or you can remap how your textures get placed.

s and t are gathered from the u and v of the initial texture map space.

[lumiere]

No, it does not work for me.
Mental Ray return me the follow message:

mental ray for Maya 6.5
mental ray: version 3.4.1.5, 27 Dec 2004
API 0.0 error 301031: call to undeclared function "threads"
API 0.0 error 301036: undefined shader "threads1

Enrico"

[bart]

Did you put references to the shader in your maya.rayrc file, both an mi command and a link command like there is for base, physics, etc.?

Also, we should probably address the compiling issue first. Did you see the section in the manual I referred to above?

[lumiere]

I have set the references, Maya return me the follow message in the output window:

mental ray for Maya 6.5
mental ray: version 3.4.1.5, 27 Dec 2004
API 0.0 warn 302004: C:/Program Files/Alias/Maya6.5/mentalray/include/threads.mi, line 9: while defining declaration "threads": declaring nonexisting function threads
PHEN 0.2 error 051011: shader "threads" not found
PHEN 0.2 error 051011: shader "threads" not found
GEOE 0.2 error 091030: evaluation of displacement shader failed

I have tried with and without the #: nodeid 101
And yes, I use the correct shader.lib

Thanks Enrico

[bart]

The first warning indicates that the threads.dll is either not found or not loading, or not loading properly. Please increase verbosity, to track this better. Try Translation with mode set to progress in mental ray render globals.

And, just to make sure, you use shader.lib when you are compiling and no longer get the warnings you indicated previously?

[lumiere]

Sorry, double post.

Enrico