Object likely to NullObject

Helper

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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 12/04/2008 at 06:18, xxxxxxxx wrote:

User Information:
Cinema 4D Version:   10.1
Platform:   Windows ; Mac ; Mac OSX ;
Language(s) :     C++ ;

---------
Hi,

I need to make a plugin object that's in fact a Null Object (including e.g. the ID_BASEOBJECT_COLOR and ID_BASEOBJECT_SHADEDWIRECOLORMODE working as in an Null Object), just with 2 extra attributes.

I tried with:

> `

class OPointOfInterest : public ObjectData  
\>  {  
\>       INSTANCEOF(OPointOfInterest,ObjectData)  
\>    
\>       private:  
\>    
\>       public:  
\>            virtual Bool Init(GeListNode *node);  
\>    
\>            virtual Bool Message                    (GeListNode *node, LONG type, void *data);  
\>            virtual Bool Draw                         (PluginObject *op, LONG type, BaseDraw *bd, BaseDrawHelp *bh);  
\>            virtual Bool GetDEnabling               (GeListNode *node, const DescID &id;,GeData &t;_data,LONG flags,const BaseContainer *itemdesc);  
\>            virtual void CheckDirty(PluginObject* op, BaseDocument* doc);  
\>    
\>            static NodeData *Alloc(void) { return gNew OPointOfInterest; }  
\>  };

`

All void functions just return TRUE.

I try to register it with:
> `

Bool RegisterPointOfInterest(void)  
\>  {  
\>       // decide by name if the plugin shall be registered - just for user convenience  
\>       String name=GeLoadString(IDS_POINTOFINTEREST); if (!name.Content()) return TRUE;  
\>       return RegisterObjectPlugin(ID_POINTOFINTEREST,name,0,OPointOfInterest::Alloc,"OPointOfInterest","PointOfInterest.tif",0);  
\>  }

`

Not sure about the "0" flag, have also tried OBJECT_GENERATOR.

In the .res file I include Onull and add some attributes.

Now the object looks like I want, and has all attributes that I want. But if I try to use the Null Object's functionality to draw e.g. a circle in a certain color, it does not work. Nothing is drawn.

What do I have to do to make an object that completely behaves like the null object?

Thanks in advance for hints and help

Best regards,
Jack

Helper

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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 12/04/2008 at 07:42, xxxxxxxx wrote:

Howdy,

Well, the drawing of a Null object is in the NULL object's ObjectData::Draw() function, which you'd have to mimic in your OPointOfInterest::Draw() function. ;o)

Adios,
Cactus Dan

Helper

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

On 12/04/2008 at 19:39, xxxxxxxx wrote:

Just return a Null object in GetVirtualObjects. Here an example (it's a modified sample from the SDK)

> \> class MorphMixerObject : public ObjectData \> { \> INSTANCEOF(MorphMixerObject,ObjectData) \> \> public: \> virtual BaseObject\* GetVirtualObjects(PluginObject \*op, HierarchyHelp \*hh); \> \> static NodeData \*Alloc(void) { return gNew MorphMixerObject; } \> }; \> \> // create morphed object \> BaseObject \*MorphMixerObject::GetVirtualObjects(PluginObject \*op, HierarchyHelp \*hh) \> { \> BaseObject \*null = NULL; \> null = BaseObject::Alloc(Onull); \> if (!null) goto Error; \> \> BaseContainer \*data = null->GetDataInstance(); \> \> data->SetLong(NULLOBJECT_DISPLAY, NULLOBJECT_DISPLAY_PENTAGON); \> \> return null; \> \> Error: \> BaseObject::Free(null); \> return NULL; \> } \> \> // be sure to use unique IDs obtained from www.plugincafe.com \> #define ID_MORPHMIXER_OBJECT 1001156 \> \> Bool RegisterMorphMixer(void) \> { \> // decide by name if the plugin shall be registered - just for user convenience \> String name=GeLoadString(IDS_MORPHMIXER); if (!name.Content()) return TRUE; \> return RegisterObjectPlugin(ID_MORPHMIXER_OBJECT,name,OBJECT_GENERATOR,MorphMixerObject::Alloc,"Omorphmixer","morphmixer.tif",0); \> } \>

cheers,
Matthias

Helper

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

On 13/04/2008 at 09:00, xxxxxxxx wrote:

Right that's a good possibility, too. Thanks again, Matthias!

Anway, I already did the drawing stuff in the Draw(), that way I have the possibility to draw some more things and give the object a special look.

Greetings,
Jack