节点材质系统初步搭建完毕

节点材质系统初步搭建完毕

我的节点材质系统已经基本搭建完毕，ShaderFX和虚幻UDK给于了极大的启发与支持，感谢感谢

以下效果图是骨骼动画的各通道效果图

Ambient Map

Diffuse Map

Specular Map

 

节点暂时还是用C++构造的，之后会改为二进制存储

        MaterialCompiler Compiler;

        MaterialNodeTextureSampler SamplerNode(&Compiler);

        /*MaterialNodeVector VectorNode(&Compiler);

        VectorNode.mData = Vector4( 1,1,0,0);*/

        MaterialNodeAdd AddNode(&Compiler);

        MaterialNodePointLight PointLightNode(&Compiler);

        //VectorNode.mRGB.LinkTo( &AddNode.mDataX );

        //SamplerNode.mRGB.LinkTo( &AddNode.mDataY );

        SamplerNode.mRGB.LinkTo( &PointLightNode.mAmbient );

        //AddNode.mResult.LinkTo( &PointLightNode.mDiffuse );

        if ( Compiler.GetErrorCount() == 0 )

        {    

            PointLightNode.Compile();

            Compiler.SaveCode( StringConverter().AnsiToUnicode( mShaderFile.c_str() ) );

        }

生成的代码格式和虚幻的shader模板一摸一样，不过我的利用了点不定参数列表的小技巧，代码更漂亮的，呵呵

    MaterialNodePointLight::MaterialNodePointLight(MaterialCompiler* Compiler)

        : MaterialNode( Compiler )

    {

        mAmbient    .BindSlot( L"Ambient",        this, MVT_Float3, "float3(0.0f,0.0f,0.0f)" );

        mDiffuse    .BindSlot( L"Diffuse",        this, MVT_Float3, "float3(0.0f,0.0f,0.0f)" );

        mNormal     .BindSlot( L"Normal",        this, MVT_Float3, "Parameters.VertexNormal" );

        mSpecular   .BindSlot( L"Specular",        this, MVT_Float3, "float3(0.0f,0.0f,0.0f)");

        mSpecularPow.BindSlot( L"SpecularPow",    this, MVT_Float,  "16.0f");

        mOpacity    .BindSlot( L"Opacity",        this, MVT_Float,  "1.0f");

    }

    typedef std::vector<void*> FormatParameterArray;

    void MaterialNodePointLight::Compile(  )

    {

        dword CodeGenLength = 0;

        FormatParameterArray tFormatParameterArray;

        // 编译代码,并构建格式化数组

        for ( SlotList::iterator it = mSlotList.begin();

            it != mSlotList.end();

            ++it )

        {

            MaterialSlot* Slot = *it;

            Slot->Compile();

            CodeGenLength += StringHelperA::Length( Slot->GetResultCode() );

            CodeGenLength += StringHelperA::Length( Slot->GetCaculateCode() );

            tFormatParameterArray.push_back( (void*)Slot->GetCaculateCode() );

            tFormatParameterArray.push_back( (void*)Slot->GetResultCode() );

        }

        // 读取模板文件

        FileStream ShaderFile;

        if ( !ShaderFile.Open(L"shader/MaterialTemplatePixelShader.usf", FAM_Read ) )

        {

            Assert( false );

        }

        dword ShaderFileSize = ShaderFile.GetSize();

        AString ShaderTemplateCode;

        ShaderTemplateCode.resize( ShaderFileSize + 1);

        ShaderFile.ReadBuffer( (void*)ShaderTemplateCode.data(), ShaderFileSize * sizeof( char ) );

        ShaderTemplateCode[ShaderFileSize] = 0;

        mCompiler->WriteFinalCode( ShaderFileSize + CodeGenLength , ShaderTemplateCode.c_str(), &tFormatParameterArray[0] );

    }