STATE_track_get_point_element

 

 




   point element can be 0 or 1 or 2
   0 means get the x element. 1 ==> y. 2 ==>z
   note that if the point_index or the element number
   are out of range the function returns 0. there is no way 
   to know if the 0 is because of error or no.

 

 

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