lambertShader/lambertShaderOverride.cpp

//-
// ===========================================================================
// Copyright 2015 Autodesk, Inc.  All rights reserved.
//
// Use of this software is subject to the terms of the Autodesk license
// agreement provided at the time of installation or download, or which
// otherwise accompanies this software in either electronic or hard copy form.
// ===========================================================================
//+

#include "lambertShaderOverride.h"

MHWRender::MPxSurfaceShadingNodeOverride* lambertShaderOverride::creator(const MObject& obj)
{
    return new lambertShaderOverride(obj);
}

lambertShaderOverride::lambertShaderOverride(const MObject& obj)
: MPxSurfaceShadingNodeOverride(obj)
{
}

lambertShaderOverride::~lambertShaderOverride()
{
}

MHWRender::DrawAPI lambertShaderOverride::supportedDrawAPIs() const
{
    // works in both gl and dx
    return MHWRender::kOpenGL | MHWRender::kDirectX11 | MHWRender::kOpenGLCoreProfile;
}

MString lambertShaderOverride::fragmentName() const
{
    // Just reuse Maya's lambert surface shader
    return "mayaLambertSurface";
}

void lambertShaderOverride::getCustomMappings(
    MHWRender::MAttributeParameterMappingList& mappings)
{
    // The "color", "transparency" and "incandescence" attributes are all
    // named the same as the corresponding parameters on the fragment so they
    // will map automatically. Need to remap diffuseReflectivity and
    // translucence though
    MHWRender::MAttributeParameterMapping diffuseMapping(
        "diffuse", "diffuseReflectivity", true, true);
    mappings.append(diffuseMapping);

    MHWRender::MAttributeParameterMapping translucenceMapping(
        "translucence", "translucenceCoeff", true, true);
    mappings.append(translucenceMapping);
}

MString lambertShaderOverride::primaryColorParameter() const
{
    // Use the color parameter from the lambert fragment as the primary color
    return "color";
}

MString lambertShaderOverride::transparencyParameter() const
{
    // Use the "transparency" parameter from the lambert fragment for transparency
    return "transparency";
}

MString lambertShaderOverride::bumpAttribute() const
{
    // Use the "normalCamera" attribute to recognize bump connections
    return "normalCamera";
}