IDirect3DRMViewport::Transform

HRESULT Transform(D3DRMVECTOR4D * lprvDst, D3DVECTOR * lprvSrc);

Transforms the vector in the lprvSrc parameter in world coordinates to screen coordinates, and returns the result in the lprvDst parameter.

·Returns D3DRM_OK if successful, or an error otherwise. For a list of possible return codes, see Direct3D Retained-Mode Return Values.

lprvDst

Address of a D3DRMVECTOR4D structure that acts as the destination for the transformation operation.

lprvSrc

Address of a D3DVECTOR structure that acts as the source for the transformation operation.

The result of the transformation is a four-element homogeneous vector. The point represented by the resulting vector is visible if the following equations are true: