/******************************************************************************

Copyright Alex Hogan, 2006

The author accepts no liability from your use or misuse of the content provided
here. Use at your own risk.



Description: 
This is a quick example shader that will work in Maya 7.0 and output 
an unlit, user-defined color.

******************************************************************************/




// globals from Maya

float4x4 worldMatrix : World;	// World or Model matrix
float4x4 wvpMatrix : WorldViewProjection;	// Model*View*Projection
float4x4 worldViewMatrix : WorldView;
float4x4 worldViewMatrixI : WorldViewInverse;
float4x4 viewInverseMatrix : ViewInverseTranspose;
float4x4 ViewInv : ViewInverse;
float4x4 wvIT : WorldViewInverseTranspose;
float4x4 viewMatrix : View;

// tweakables
float3 inColor                          
<                                                  
    string UIName = "inColor";                       
    string UIWidget = "Color";                      
    string Type     = "Color";                      
> = { 0.0, 0.0, 0.1};

// structures and shaders /////////////////////

struct a2v
{
	float4 Position : POSITION; //in object space
};

struct v2f
{
	float4 Position : POSITION; //in projection space
};

v2f BlinnMVS(a2v IN)
{
	v2f OUT;
    OUT.Position = IN.Position;

    float4 Pobject = float4(IN.Position.xyz,1);
    float4 Pworld = mul(worldMatrix,Pobject);
	OUT.Position = mul(wvpMatrix,Pobject);

	return OUT;
}

float4 BlinnMPS( v2f IN ) : COLOR
{
    return float4( inColor, 1.0);
}



//////// techniques ////////////////////////////

technique BlinnM
{
	pass
	{
		DepthTestEnable=true;
		DepthMask = true;
		DepthFunc = LEqual;
		VertexProgram = compile arbvp1 BlinnMVS();
		FragmentProgram = compile arbfp1 BlinnMPS();
	}
}