PointPick method

Performs a surface pick at the specified output point.

Syntax


HRESULT retVal = object.PointPick(pPoint, pulInputSurfaceIndex, pInputPoint);

Parameters

pPoint [in]

Type: const DXVEC

Pointer to a location on the output surface to use in the pick operation.

pulInputSurfaceIndex [out]

Type: unsigned long

Pointer to an indexed value of the input surface given by the surface pick.

pInputPoint [out]

Type: DXVEC

Pointer to the location on the input surface that was selected by the surface pick. Because the transformed input might be inverted or rotated relative to its original orientation, pPoint and pInputPoint are not necessarily the same. The point returned is in the input surface's coordinate frame.

Remarks

If an image transform has no input data or cannot map the pick event back to one of the inputs, IDXSurfacePick::PointPick returns DXT_S_HITOUTPUT, if the pick point intersects the output surface. For example, this is the case for any procedural surface, such as the gradient surface.

 

 

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