187167_en-US

liliconcom

OOP Need help getting methods to return objects.

I am working on a class of vectors in JSL.  I would like to have a method that would return a normalized version of the vector.  Below is my script and error message.  Thanks!

Clear Log();
Clear Globals();

Define Class(
 "vector",
 x = 0;
 y = 0;
 z = 0;
 _init_ = Method( {a, b, c = 0},
  x = a;
  y = b;
  z = c;
 );
 _show_ = Method( {},
  Return( x, y, z )
 );
 mag = Method( {},
  magnitude = Sqrt( x ^ 2 + y ^ 2 + z ^ 2 )
 );
 normalize = Method( {},
  nv = vector(0,0,0);
  length = Sqrt( x ^ 2 + y ^ 2 + z ^ 2 );
  show(length);
  nv:x = x / length;
  nv:y = y / length;
  nv:z = z / length;
  nv;
 );
);

bob = New Object( vector( 4, 2 ) );
Show( bob );
bob<<NORMALIZE></NORMALIZE>

Name Unresolved: vector in access or evaluation of 'vector' , vector( 0, 0, 0 )

Re: OOP Need help getting methods to return objects.

I am a novice when it comes to classes in general and JMP Classes.  This works:

Clear Log();
Clear Globals();

Define Class(
 "vector",
 x = 0;
 y = 0;
 z = 0;
 _init_ = Method( {a, b, c = 0},
  x = a;
  y = b;
  z = c;
 );
 _show_ = Method( {},
  Return( x, y, z )
 );
 mag = Method( {},
  magnitude = Sqrt( x ^ 2 + y ^ 2 + z ^ 2 )
 );
 normalize = Method( {},
  nv = [0,0,0];
  length = Sqrt( x ^ 2 + y ^ 2 + z ^ 2 );
  show(length);
  nv[1] = x / length;
  nv[2] = y / length;
  nv[3] = z / length;
  Print(char(nv));
  nv;
 );
);

bob = New Object( vector( 4, 2 ) );
Show( bob );
bob = bob:normalize();
show(bob);

Ther is a method to pass self.  I suggest the JMP Scripting Guide and searching this website for Classes. 

Re: OOP Need help getting methods to return objects.

Georgia,

 

Thanks for your reply.  I found the "clone" message for objects that I can use to create a copy of the object and then normalize it.  I will keep looking around and see if I can find anything on how to return objects from methods directly like they do in the "complex" class example.

 

John