DirectX 11 Shader Error. Pixel Shader receiving only NaN

Question

Hy everyone. I started re-coding my engine to convert it to directx 11. I'm now trying to get the basics working, but this error is really stoping me. I created a basic shader, a simple dot product of the normal and the view. I got it to compile without errors, but it dosnt works. It just totaly deforms the input mesh. I started debugging in vs2012, and found out that the pixel shader was getting as input all NaNs. I attached two screens and the shader code, if someone can provide any ideas, it would be really apriciated.

Vertex Shader

//----------------------------------------------------------------------------   
// Constant Buffer Variables
//----------------------------------------------------------------------------
cbuffer ConstantBuffer : register( b0 )
{
matrix World;
matrix View;
matrix Projection;
//float3 CameraPos;
float Power;
}

//--------------------------------------------------------------------------- 
struct VS_INPUT
{
   float4 Pos : POSITION;
   float3 Normal : NORMAL;
};
struct VS_OUTPUT
{
    float4 Pos : SV_POSITION;
float3 Normal : TEXCOORD0;
};

//--------------------------------------------------------------------------
// Vertex Shader
//-------------------------------------------------------------------------------
VS_OUTPUT VS( VS_INPUT input)
{
   VS_OUTPUT output = (VS_OUTPUT)0;

   output.Pos = mul( input.Pos, World );
   output.Pos = mul( output.Pos, View );
   output.Pos = mul( output.Pos, Projection );
   output.Normal = mul( float4( input.Normal, 1 ), World ).xyz;
   //output.wNormal = input.Normal;
   return output;
 }

And here the Pixel Shader

//------------------------------------------------------------------------------
// Constant Buffer Variables
//------------------------------------------------------------------------------
cbuffer ConstantBuffer : register( b0 )
{
matrix World;
matrix View;
matrix Projection;
float Power;
}

//------------------------------------------------------------------------------
struct VS_OUTPUT
{
    float4 Pos : SV_POSITION;
float3 wNormal : TEXCOORD0;
};


//-----------------------------------------------------------------------------
// Pixel Shader
//-----------------------------------------------------------------------------
float4 PS( VS_OUTPUT input) : SV_Target
{
    //return pow(dot(input.wNormal,float3(0,0,0)),Power); // fixed camera, just for now
return float4(0.1,0.6,0.1,1);
}

And at last, i created a xml file structure for my shaders, that i then parse, dont know if it relevant, but

<?xml version="1.0" encoding="utf-8"?>
<vs path = "D:\\Documentos\\Visual Studio 2012\\Projects\\Fusion Engine\\Tests\\ConstantLighting_VS.hlsl" name ="VS" target = "vs_4_0">
</vs>
<ps path = "D:\\Documentos\\Visual Studio 2012\\Projects\\Fusion Engine\\Tests\\ConstantLighting_PS.hlsl" name ="PS" target = "ps_4_0">
  <val1 type = "scalar" value = "0.456645" name = "Power"/>
</ps>

Cory Barker Cory Barker · Accepted Answer · 2014-02-22T16:24:58

You could just use #pragma pack_matrix(row_major) in your shader instead of tranposing matrices on the cpu side

DirectX 11 Shader Error. Pixel Shader receiving only NaN

4 Answers