On , Joeish W wrote:
>
>I got the callback working somewhat to illustrate here is my code so far below
>and again im attempting to convert the lowest function on this page:
>http://opencv-srf.blogspot.com/2011/11/track-bars.html
>
>(defcallback a :void ((contrast :int) (img cv-arr) (des
>here is my attempt but i have no idea how to define a function as a pointer
>and ive tried alot of variations but is too long to post. The defun change
>contrast compiles btw...i tried using make-pointer to make the change-contrast
>function a pointer but make-pointer wants it to be a real...
the below function create-trackbar-example works except for the last parameter
of create-trackbar, "test" ..the test parameter is supposed to be a function
that gets called when the trackbar moves. cvCreateTrackbar, the function I'm
wrapping, creates a gui slider on the Opencv output window
