still question about object axis

Helper

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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 14/06/2009 at 13:55, xxxxxxxx wrote:

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

---------
hi there,

i am totally struggling now.. i need to set the axis of an object to a specific value and i have absolutely no clue how to do this. not even a shade of knowledge...

for example i want to set it to the global (0,0,0) coordinate..

maybe someone can help me solve this? i've got the first tip here, but i must admit that i dont understand that matrix stuff good enough to use it...

thanks in advance,
ello

Helper

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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 14/06/2009 at 15:29, xxxxxxxx wrote:

could it really be that it is that simple???

> `

  
\>  void setAxis(BaseDocument *doc, BaseObject *op, Vector pos)  
\>  {  
\>       Matrix m;  
\>       Matrix tm;  
\>       m.off = pos;  
\>       while(op)  
\>       {  
\>            if (op->GetType()==Opolygon)  
\>            {  
\>                 tm = op->GetMl();  
\>                 PointObject *pobj = static_cast<PointObject*>(op);  
\>                 Vector *parr = pobj->GetPointW();  
\>                 LONG pcnt = pobj->GetPointCount();  
\>                 GePrint(LongToString(pcnt));  
\>                 for(int i=0;i<pcnt;i++)  
\>                 {  
\>                      parr[i]*=tm;  
\>                 }  
\>    
\>                 op->SetMl(m,FALSE);  
\>            }  
\>            setAxis(doc,op->GetDown(),pos);  
\>            op = op->GetNext();  
\>       }  
\>  }  
\>

`

in my first tests it seems that this is it??

thanks for checking,
ello

Helper

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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 14/06/2009 at 15:55, xxxxxxxx wrote:

hm, now i face another problem.. what is wrong with my code? i am trying to calculate the center of a polygonobject, but it doesnt work:

> `

  
\>                 Vector cpos = Vector(0);  
\>                 PointObject *pobj = static_cast<PointObject*>(op);  
\>                 Vector *parr = pobj->GetPointW();  
\>                 LONG pcnt = pobj->GetPointCount();  
\>                 if (pcnt>0)  
\>                 {  
\>                      for(int i=0;i<pcnt;i++)  
\>                      {  
\>                           cpos += parr[i];  
\>                      }  
\>                      cpos /= pcnt;  
\>                 }  
\>

`

where's my fault?

thanks and cheers,
ello

Helper

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

On 15/06/2009 at 13:44, xxxxxxxx wrote:

hmm, somehow the axis is not centered correctly, nearby, but not exactly where it should be..

> `

  
\>  void setAxisSingleObject(BaseObject *op, Vector pos)  
\>  {  
\>       Matrix m;  
\>       m.off = -pos;  
\>       if (op->GetType()==Opolygon)  
\>       {  
\>            PointObject *pobj = static_cast<PointObject*>(op);  
\>            Vector *parr = pobj->GetPointW();  
\>            LONG pcnt = pobj->GetPointCount();  
\>            for(int i=0;i<pcnt;i++)  
\>            {  
\>                 parr[i]*=m;  
\>            }  
\>            m.off = pos;  
\>            op->SetMl(m,FALSE);  
\>       }  
\>  }  
\>    
\>  void centerAxis(BaseObject *op)  
\>  {  
\>            if (op->GetType()==Opolygon)  
\>            {  
\>                 Vector cpos = Vector(0);  
\>                 PointObject *pobj = static_cast<PointObject*>(op);  
\>                 Vector *parr = pobj->GetPointW();  
\>                 LONG pcnt = pobj->GetPointCount();  
\>                 if (pcnt>0)  
\>                 {  
\>                      for(int i=0;i<pcnt;i++)  
\>                      {  
\>                           cpos += parr[i];  
\>                      }  
\>                      cpos /= pcnt;  
\>                      setAxisSingleObject(op, cpos+op->GetPos());  
\>                 }  
\>            }  
\>  }  
\>

`

anyone sees where i am wrong here?

thanks in advance.
cheers,
ello