Handling VRayMaterial from C++

V-Ray V-Ray Common Public
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1

Hello!,
First of all, this is my first topic. Thus, forgive me if this is not the right place to request help.
Despite the fact my company has a license I cannot open a topic in the SDK forum.

My issue is related with VRay sdk for 3dsMax 2018.

Is there any way to handle the VRayMaterial in a native manner? I mean, handling VRayMaterials without using the paramblock interface.

Thanks for your help,
Jesus

2

Hello,

Can you elaborate a bit more - what do you need to do with the VRayMtl ?

Best regards,
Yavor

3

Thanks for the quick answer Yavor,

I just need to check some material properties, but trying to guess every single combination of (Parameter block - Parameter) id is rough.
Thus, I would like to have something like VRayMtl.h where I can access the class definition.

I attach a code just to give a hint of what I’m asking:


// This is how I'm accessing the properties right now
void actOnAColor(Mtl* material) {
    // This is the intended way of getting properties in 3ds Max sdk if I'm not wrong
    IParamBlock2 *paramBlock = material->GetParamBlock(VRayMtlParameters::vrayMtl_old_id );
    if (paramBlock != nullptr) {
        Color color = paramBlock->GetColor(VRayMtlParameters::pb_diffuse_color);
        // Do whatever you want with the color.
    }
}

// This is how I would like to access the properties
void actOnAColor(Mtl* material) {
    VRayMtl *mtl = dynamic_cast<VRayMtl *>(material);
    if (mtl != nullptr) {
        Color color = mtl->GetDiffuseColor(); // Or something similar
        // Do whatever you want with the color.
    }
}

Best regards,
Jesus

4

Actually the param block way is the right way. VRayMtl itself reads the values from the param block in the beginning of the render.
From the example code I see you’ve already found the pb2vraymtl.h header that has the IDs of all the params. You should use the GetParamBlockByID function with the values from the first enum (vrayMtl_basic_id, vrayMtl_BRDF_id…).

If there are params you have trouble finding - list them here and I can check.

Best regards,
Yavor

5

Yes, I’ve found that header.
I guess I’ll stick to the right way.
Thanks for your help.

Best regards,
Jesus