Iterating through children



  • THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

    On 06/03/2011 at 14:18, xxxxxxxx wrote:

    User Information:
    Cinema 4D Version:   12 
    Platform:   Windows  ;   
    Language(s) :     C++  ;

    ---------
    Hello,

    I would like to Iterate through the children of a particular object in the OM.  Let's call this object BOB.  So I would like to check first to see if BOB has any children.. So I do this with

      
     if(BOB->GetDown()){  
      
      
    //Do Something  
    }  
    

    Now inside of that If statement I would like to iterate through all of the children that BOB has to see if any of his children have a particular name..

    so in my head it looks like this..

      
     if(BOB->GetDown()){  
      
    for(BOB->GetDown() ; BOB->GetLast() ; BOB->GetDown->GetNext()){  
      
    GePrint(op->GetName());  
      
    }  
      
    }  
    

    So I have an idea of how it should be done but I am a little fuzzy on all the details.    Could someone drop me a sample code of how I should do it?

    Thanks so much..

    ~Shawn



  • THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

    On 06/03/2011 at 14:42, xxxxxxxx wrote:

    I think I figured it out...   This is what I am doing now..  Please let me know if there is a better way.

      
      
    if (objectToOrbit->GetDown()){  
            
          BaseObject *obj = objectToOrbit->GetDown();  
          while(obj)  
          {  
              if(obj->GetName() == "Orbit Path"){  
                  GePrint("FOUND THE MONKEY");  
              }  
              obj = obj->GetNext();  
          }  
      }  
      
    


  • THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

    On 06/03/2011 at 15:00, xxxxxxxx wrote:

    Hehe, why did you first call "GetLast()" ? ^^
    If you use GetNext() after GetLast() there will be none. 😉



  • THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

    On 06/03/2011 at 15:03, xxxxxxxx wrote:

    I think the method in the second post will work fine, it's the method I use (for what that's worth!!). The only problem is if your child objects themselves have children and you need to check those. You need a recursive function if that's the case, but for a single level of child objects this looks fine.



  • THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

    On 07/03/2011 at 01:05, xxxxxxxx wrote:

    To iterate through the complete hierarchy of a document do something like this.

      
    void WalkTheHierarchy(BaseObject *op)  
    {  
       while(op)  
      {  
          StatusSetSpin();  
          // do something with op....  
          GePrint(op->GetName());  
      
          WalkTheHierarchy(op->GetDown());  
      
          op = op->GetNext();  
      }  
    }  
      
    ...  
      
    WalkTheHierarchy(doc->GetFirstObject());  
    

    You could have found this information in the forum btw, please use the forum search.

    cheers,
    Matthias



  • THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

    On 07/03/2011 at 05:25, xxxxxxxx wrote:

    While "WalkTheHierarchy(op->GetDown())" is just fine, you can increase performance and avoid pushing onto/popping off a bunch of stack stuff by doing a quick check first:

    ...
    if (op->GetDown()) WalkTheHierarchy(op->GetDown());
    ...

    This adds a conditional and a duplicate call but it means that you stay within this iteration of the recursion without needless recursion stacking.



  • THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

    On 10/03/2011 at 09:55, xxxxxxxx wrote:

    Thanks Guys!


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