[Memo] How to Use user-provided mentalray shader in Maya? (How to use custom mentalray shader in Maya)

Document directory

• 1. Create VC project files
• 5. Modify Maya. env
• 6. Test

Note: a feasible method is provided by referring to the maya2009 document and slightly modifying it. If there are any errors or inappropriate ones, please correct them more. Thank you ~

 

1. Create VC project files

Create a new mytexture. vcproj according to the configuration of maya2009/devkit/mentalray/docs/writingshaders/mayashaderexample_32bit.vcproj to ensure that the output file is mytexture. dll.

2. mytexture
. C

Add code in mytexture. vcproj (see maya009 document --> Mental Ray for Maya reference
--> Example scene with custom shader
)

------------------------------------------------------------------------------

# Include <stdio. h>
# Include "shader. H"

Struct mytexture
{
Miscalar min;
Miscalar Max;
};

Extern "C" dllexport
Int mytexture_version (void) {return (1 );}

Extern "C" dllexport
Miboolean mytexture (
Micolor * result,
Mistate * state,
Struct mytexture * paras)
{
Mivector VEC;
Miscalar min, Max;

Mi_point_to_object (State, & VEC, & State-> point );
Min = * mi_eval_scalar (& paras-> min );
Max = * mi_eval_scalar (& paras-> MAX );
Result-> r = Vec. x <0? Min: Max;
Result-> G = Vec. Y <0? Min: Max;
Result-> B = Vec. z <0? Min: Max;
Result-> A = 1;
Return (mitrue );
}

------------------------------------------------------------------------------

Note: extern "C" dllexport must be added; otherwise, when rendering with mentalray, the following message is displayed:

Phen 0.3 error 051011: shader "mytexture" not found

 

3. mytexture
. Mi

Create mytexture. MI in the directory of the same level as mytexture. dll:

------------------------------------------------------------------------------

Min version "3.0.0"
Max version "3.6.99"

Declare shader
Color "mytexture
"(
Scalar "min", #: Default 0.3
Scalar "Max", #: Default 1.0
)

Version 1
# Apply Material

# If you use material



Hypershader --> Create mentalray nodes --> there will be mytexture under material,

#: Nodeid 2007;

End declare

------------------------------------------------------------------------------

 

4. aemytexture
Template. Mel

Under the directory of the same level as mytexture. dll
Create aemytexture
Template. MEL:

------------------------------------------------------------------------------

Global proc aemytexture
Template (string $ nodename)
{

Editortemplate-beginscrolllayout;

// MIB light attributes
Editortemplate-beginlayout "mytexture attributes"-collapse 0;
Editortemplate-label "min"-addcontrol "min ";
Editortemplate-label "Max"-addcontrol "Max"

Editortemplate-endlayout;

}
------------------------------------------------------------------------------

 

5. Modify Maya. env

Add the path of mytexture. dll, for example, add:

------------------------------------------------------------------------------

Maya_location
= D:/program files/Autodesk/maya2009

Path = $ maya_location
/Mentalray/LIB; $ path ;//! -Maya needs to find several DLL values of mentalray.

Mi_custom_shader_path =

$ Maya_location
/Devkit/mentalray/docs/writingshaders;

------------------------------------------------------------------------------

 

6. Test

Open Maya and choose Window> rendering editors> Mental Ray> shader manager. You can see mytexture.
. Mi has been loaded.

There will be mytexture nodes under hypershader --> Create mentalray nodes --> miscellaneous.

Create a mytexture texture, assign it to an object, and then use mentalray to render the texture.