GetPixelInfoPoint trouble [SOLVED]

Helper

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

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

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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?

Helper

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

_<_t_>_`ViewportPixel`[URL-REMOVED]* GetPixelInfoPoint	(	`Int32`[URL-REMOVED]	x,
	`Int32`[URL-REMOVED]	y
)		<_<_t_>_

Retrieves point information at the pixel position ( x , y ).
Parameters
| [in]| x| An X coordinate within the viewport. Must be 0 <= x < w , where w is the width given to Init()[URL-REMOVED].

[in]	y	A Y coordinate within the viewport. Must be 0 <= y < h , where h is the height given to `Init()`[URL-REMOVED]_<_t_>_d>

Returns
The retrieved point information, or nullptr if no information could be retrieved. The ViewportSelect[URL-REMOVED] instance owns the pointed viewport pixel..

check against nullptr not 0

[URL-REMOVED] @maxon: This section contained a non-resolving link which has been removed.

Helper

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

Thank you, Mohamed.
I made it work now