Passing types to functions

[ShadowCentaur]

I'm writing a little two dimensional gas simulator and having some trouble passing types to functions.  I want to make a function that will spit out the dot product of two vectors (and later maybe the orthogonal projection). I keep getting a "Expecting coma's between 'dotproduct' Function declarations input parameters. What is it that I'm screwing up?

// a two dimensional vector
type tvector
   // x value
   x#
   // y value
   y#
endtype


// mainloopstuff in here
// compute the dot product of two vectors, a and b
function dotproduct(a as tvector, b as tvector)
   
   product#=a.x#*b.x#+a.y#*b.y#
   
   
   
endfunction product#

[kevin]

  This is all covered in the Help.  There's various tutorials in the help/About section for TYPES tutorial.


   This function accepts array passes for parameters A and B... which is ok if you want to pass typed variables / arrays & lists in as a whole, but you can't operate upon a particular element from within that container.  You get the whole structure (conatiners and all the elements)

Code Select Expand


function dotproduct(a.tvector, b.tvector)

endfunction



or, this version accept individual elements.  So the locals A and B are basically pointing at elements from a Variable/Array or List container.  They can't see the container this time though. 

Code Select Expand



     type  tvector
          x#,y#
     endtype

     Dim Vectors(100) as  tvector

    ; allocate a couple of them from the array
    Vectors(10)  = new tvector
    Vectors(20)  = new tvector

    ; call the dot product

    result#= dotproduct(Vectors(10), Vectors(20)


function dotproduct(a as tvector, b as tvector)

endfunction result#