D2DSampleInputAtPosition function

Samples input N at an absolute scene position, rather than an input-relative position. Only available for complex inputs.

Syntax

float4 WINAPI D2DSampleInputAtPosition(
  in uint N,
  in float2 uv
);

Parameters

N [in]

The input number.

uv [in]

The uv position.

Return value

The function returns a float4, in the format TEXCOORDN.

Remarks

The following example shows the function used in a circular wrap.

  
D2D_PS_ENTRY(CircularWrapPS)  
{  
    // TODO: perform math to calculate a circular wrap
  
    // Find the input scene position.  
    float2 inputScenePosition = float2( TODO: add math parameters );  
  
    return D2DSampleInputAtPosition(0, inputScenePosition);  
}

Requirements

Requirement	Value
Header	D2d1effecthelpers.hlsli
DLL	D2d1.dll

See also

Effect Shader Linking

HLSL Helpers