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D3DX10ComputeNormalMap function

Converts a height map into a normal map. The (x,y,z) components of each normal are mapped to the (r,g,b) channels of the output texture.

Syntax

C++


HRESULT D3DX10ComputeNormalMap(
  _In_ ID3D10Texture2D *pSrcTexture,
  _In_ UINT            Flags,
  _In_ UINT            Channel,
  _In_ FLOAT           Amplitude,
  _In_ ID3D10Texture2D *pDestTexture
);

Parameters

pSrcTexture [in]

Type: ID3D10Texture2D*

Pointer to an ID3D10Texture2D interface, representing the source height-map texture.

Flags [in]

Type: UINT

One or more D3DX_NORMALMAP flags that control generation of normal maps.

Channel [in]

Type: UINT

One D3DX_CHANNEL flag specifying the source of height information.

Amplitude [in]

Type: FLOAT

Constant value multiplier that increases (or decreases) the values in the normal map. Higher values usually make bumps more visible, lower values usually make bumps less visible.

pDestTexture [in]

Type: ID3D10Texture2D*

Pointer to an ID3D10Texture2D interface, representing the destination texture.

Return value

Type: HRESULT

If the function succeeds, the return value is D3D_OK. If the function fails, the return value can be the following value: D3DERR_INVALIDCALL.

Remarks

This method computes the normal by using the central difference with a kernel size of 3x3. RGB channels in the destination contain biased (x,y,z) components of the normal. The central differencing denominator is hardcoded to 2.0.

Requirements

Header	D3DX10Tex.h
Library	D3DX10.lib