//------- Technique: Multitextured --------
struct MTVertexToPixel
{
    float4 Position         : POSITION;    
    float4 TextureWeights1  : TEXCOORD0;
    float2 TextureWeights2  : TEXCOORD1;
    float2 TextureCoords    : TEXCOORD2;
};

struct MTPixelToFrame
{
    float4 Color : COLOR0;
};

MTVertexToPixel MultiTexturedVS(float4 inPos : POSITION, float4 inTextureWeights1: TEXCOORD0, float2 inTextureWeights2: TEXCOORD1, float2 inTextureCoords: TEXCOORD2)
{    
    MTVertexToPixel Output = (MTVertexToPixel)0;
    
    float4x4 preViewProjection = mul (xView, xProjection);
    float4x4 preWorldViewProjection = mul (xWorld, preViewProjection);
    
    Output.Position = mul(inPos, preWorldViewProjection);
    Output.TextureWeights1 = inTextureWeights1;
    Output.TextureWeights2 = inTextureWeights2;
    Output.TextureCoords = inTextureCoords;

    return Output;    
}

MTPixelToFrame MultiTexturedPS(MTVertexToPixel PSIn)
{
    MTPixelToFrame Output = (MTPixelToFrame)0;        
    
    Output.Color = tex2D(TextureSampler0, PSIn.TextureCoords)*PSIn.TextureWeights1.x;
    Output.Color += tex2D(TextureSampler1, PSIn.TextureCoords)*PSIn.TextureWeights1.y;
    Output.Color += tex2D(TextureSampler2, PSIn.TextureCoords)*PSIn.TextureWeights1.z;
    Output.Color += tex2D(TextureSampler3, PSIn.TextureCoords)*PSIn.TextureWeights1.w;
    Output.Color += tex2D(TextureSampler4, PSIn.TextureCoords)*PSIn.TextureWeights2.x;
    Output.Color += tex2D(TextureSampler5, PSIn.TextureCoords)*PSIn.TextureWeights2.y;

    return Output;
}

TAPixelToFrame TextureAtlasPS(TAVertexToPixel PSIn)
{
    TAPixelToFrame Output = (TAPixelToFrame)0;        
    
    float2 textureCoords0 = PSIn.TextureCoords;
    float2 textureCoords1 = PSIn.TextureCoords; textureCoords1.x+=0.25f;
    float2 textureCoords2 = PSIn.TextureCoords; textureCoords2.x+=0.5f;
    float2 textureCoords3 = PSIn.TextureCoords; textureCoords3.x+=0.75f;
    float2 textureCoords4 = PSIn.TextureCoords; textureCoords4.y+=0.25f;
    float2 textureCoords5 = PSIn.TextureCoords; textureCoords5.x+=0.25f; textureCoords5.y+=0.25f;

    Output.Color = tex2D(TextureSampler0, textureCoords0)*PSIn.TextureWeights1.x;
    Output.Color += tex2D(TextureSampler0, textureCoords1)*PSIn.TextureWeights1.y;
    Output.Color += tex2D(TextureSampler0, textureCoords2)*PSIn.TextureWeights1.z;
    Output.Color += tex2D(TextureSampler0, textureCoords3)*PSIn.TextureWeights1.w;
    Output.Color += tex2D(TextureSampler0, textureCoords4)*PSIn.TextureWeights2.x;
    Output.Color += tex2D(TextureSampler0, textureCoords5)*PSIn.TextureWeights2.y;

    return Output;
}

			writer.Write(VersionNumber);

			// Save combination of all flags (most important)
			writer.Write((int)Flags);

			// Save the shader code.
			writer.Write(ShaderCode);

			// Save the vertex format
			VertexFormat.Save(writer);

			// And finally the features (they might change from time to time)
			writer.Write(features.Count);
			foreach (IShaderFeature feature in features)
			{
				writer.Write((int)feature.ShaderFeature);
				feature.Save(writer);
			}

			// Shader nodes go here ^^

		public MainWindow()
		{
			InitializeComponent();

			// Setup the WPF window and create a panel in the ViewportHoster for us
			WindowsApplication.SetEditorWPFWindow(this, ViewportHoster);

			// And finally start the Delta Engine like you normally would
			Application.Start(delegate
			{
				// Line from top left up to bottom right in quadratic space
				Line.Draw(new Point(0, 0), new Point(1, 1), Color.Red);
			});
		}