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Editorial Team
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Asked: 2026-06-09T14:37:46+00:00

float4 PixelShaderFunction(float2 TexCoord: TEXCOORD0) : COLOR0 { float4 color1 = tex2D(inputSampler, TexCoord); float numb

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float4 PixelShaderFunction(float2 TexCoord: TEXCOORD0) : COLOR0
{
float4 color1 = tex2D(inputSampler, TexCoord);
float numb = TestFunc( 5 );
float4 color3 = color1 + numb;
return color3;
}

float TestFunc(float numb)
{

return numb + 1;
}

I get an error saying error x3004: undeclared identifier ‘TestFunc’

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1 Answer

  1. Editorial Team

    Either declare TestFunc() before using it in PixelShaderFunction, or move it entirely before that. I. e.:

    float TestFunc(float);

float PixelShaderFunction()
{
    // ...
}

float TestFunc(float n)
{
    // ...
}

    or

    float TestFunc(float n)
{
     // ...
}

float PixelShaderFunction()
{
    // ...
}
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