GetPixelInfoPoint trouble [SOLVED]

  • On 19/12/2014 at 15:50, xxxxxxxx wrote:

    User Information:
    Cinema 4D Version:   15,16 
    Platform:      Mac OSX  ; 
    Language(s) :     C++  ;

    I'm using GetPixelInfoPoint in a tool to get information about vertexes of an object that are inside an area.
    The information is returned inside a ViewportPixel structure and the vertex is returned in variable i.
    But if the x,y coordinates provided in GetPixelInfoPoint don't match with any vertex of the object, the i variable returns 0.
    However, the x,y coordinates could match the vertex number 0 of the object.
    How can I know if a value of zero in the i variable means that there is no vertex in that coordinate or if it is reporting vertex number 0?

  • On 20/12/2014 at 06:29, xxxxxxxx wrote:

    _<_t_>_ViewportPixel* GetPixelInfoPoint ( Int32 x,
    Int32 y
    ) <_<_t_>_

    Retrieves point information at the pixel position ( x , y ).
    | [in]| x| An X coordinate within the viewport. Must be  0  <=  x  <  w , where  w  is the width given to Init().
    [in]| y| A Y coordinate within the viewport. Must be  0  <=  y  <  h , where  h  is the height given to Init()_<_t_>_d>

    The retrieved point information, or  nullptr  if no information could be retrieved. The ViewportSelect instance owns the pointed viewport pixel..

    check against nullptr not 0

  • On 20/12/2014 at 12:59, xxxxxxxx wrote:

    Thank you, Mohamed.
    I made it work now :-)

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