//////////////////////////////////////////////////////////////////////////////////
// Some transformations
float4x4 WorldToObjectTranspose : WorldInverseTranspose < string UIWidget="None"; >;
float4x4 ObjectToClip : WorldViewProjection < string UIWidget="None"; >;
float4x4 ObjectToWorld : World < string UIWidget="None"; >;
float4x4 ViewToWorld : ViewInverse < string UIWidget="None"; >;
float4x4 WorldToClip : ViewProjection < string UIWidget="None"; >;


//////////////////////////////////////////////////////////////////////////////////
// Global parameters


texture TestTexture 
< 
    string ResourceName = "earth.png";
    string ResourceType = "2D";
//    string UIWidget = "Texture";
>;

sampler2D TestSampler = sampler_state
{
    texture = <TestTexture>;
    AddressU  = CLAMP;
    AddressV  = WRAP;
    AddressW  = WRAP;
    MIPFILTER = POINT;
    MINFILTER = POINT;
    MAGFILTER = POINT;
};


float BlinkScale = 0.0f;
float3 BlinkColor = float3(1,1,0);

//////////////////////////////////////////////////////////////////////////////////
// Connector structures

struct VSIn
{
    float4 Position     : POSITION;
    float2 TexCoord     : TEXCOORD0;
};

struct VSOut
{
    float4 ClipPosition : POSITION;
    float2 TexCoord     : TEXCOORD0;
};
 

//////////////////////////////////////////////////////////////////////////////////
// Vertex shading

VSOut VS_Default( VSIn vin )
{
	
    VSOut vout = (VSOut)0;

    vout.ClipPosition = mul( ObjectToClip, float4(vin.Position.xyz,1) );
    vout.TexCoord = vin.TexCoord;
	
    return vout;
}

//////////////////////////////////////////////////////////////////////////////////
// Pixel shading

float4 PS_SimpleTexture( VSOut pin ) : COLOR
{
    float3 result = tex2D( TestSampler, pin.TexCoord.xy ).rgb;
    return float4(result+0.1,1);
}

float4 PS_Blink( VSOut pin ) : COLOR
{
	return float4(BlinkColor.rgb, BlinkScale);
}

//////////////////////////////////////////////////////////////////////////////////
// Techniques

technique TestMultiPass < string Script = "Pass=p0;"; >
{
    pass p0 < string Script = "Draw=geometry;"; >
    {
        VertexShader = compile arbvp1 VS_Default();
        PixelShader = compile arbfp1 PS_SimpleTexture();

        ZEnable = true;
        ZWriteEnable = true;
		AlphaBlendEnable = false;
    }

    pass p1 < string Script = "Draw=geometry;"; >
    {
        VertexShader = compile arbvp1 VS_Default();
        PixelShader = compile arbfp1 PS_Blink();

        ZEnable = true;
        ZWriteEnable = true;
		ZFunc = LESSEQUAL;

		AlphaBlendEnable = true;
		BlendOp = ADD;
//		SrcBlend = SRCALPHA;
//		DestBlend = INVSRCALPHA;
// stupid gl syntax...
		BlendFunc = int2(SrcAlpha, OneMinusSrcAlpha);
    }
}