MDL Function

Hello All,

How to call this lidar tmodel function

//how to bind Dpoint3d and int to form a expression to evaluate using mdlCExpression_getvalue
int FnSurfaceZ( Dpoint3d *Pt, int I) ; // with parameters

mdlCExpression_getValue( &Val, &Res, Expr, VISIBILITY_CALCULATOR);



//For Example in my previous case
int FnSurfaceName( char *Str, int I) ;

sprintf( Expr, "FnSurfaceName(%ld,%d)", (long) Name, 0) ;

mdlCExpression_getValue( &Val, &Res, Expr, VISIBILITY_CALCULATOR);