Re: [sc-dev] SC -> c++ interface

[Charlls Quarra <charlls_quarra@xxxxxxxxxxxx>]

 --- James McCartney <asynth@xxxxxx> escribió: 

> There is a document on writing primitives:   
> SuperCollider3/doc/Primitives.rtf


 Ok. So for educational purposes, suppose i have a
library call like this:

:::::::ComplexStuff.sc::::::::::
ComplexStuff : BasicStuff {
  .....
    setMyArray { | array |
        array.size.do( {arg i;
              //setToArray should be the primitive
call
             this.setToArray(i , array.at(i));
           }
         )
    }
  .....
}

So, on the other hand, i have the following in my
library


the library c++ code goes like

:::::::ComplexStuff.h:::::::::

class ComplexStuff : public BasicStuff
{
 std::vector<BasicTrumpets> array;
 ......
 virtual void SetToArray(int index ,  BasicTrumpets&
u)
 {
    if (array.size()<=index)
      array.resize(index+1);
  
    array[index]=u; 
 }  
}


So, now to the intrincate part: the binding call;
somehow i must declare

   int ComplexStuff_setToArray(struct VMGlobals* g,
int )
  {
    PyrSlot* complexstuff_instance = g->sp - 2;
    PyrSlot* index = g->sp - 1;      
    PyrSlot* basicTrumpetinstance = g->sp;

   
((ComplexStuff*)complexstuff_instance)->setToArray(   
 *((int*)(index)) ,
*((BasicTrumpet*)(basicTrumpetinstace)) );
  }

  and finally;

 definePrimitive(base, index++,
"_ComplexStuff_setToArray" , ComplexStuff_setToArray ,
2, 0);


 Im probably got all those casts very badly, im sure
is not so simple, but it shows what im trying to do

 is this more or less how this works? It seem i still
cannot click well into the mechanism





=====
Running on:
1.5 Ghz P4
256Mb 
asus v800x chipset
RH9 CCRMA-patched linux


	

	
		
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