Usin BaseDraw::DrawObject to draw spline



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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

    On 13/09/2008 at 09:32, xxxxxxxx wrote:

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

    ---------
    I try to draw a spline in the HANDLES pass, using BaseDraw::DrawObject, but nothing is showing up. The result of DrawObject ir TRUE, so I guess it should have worked.

    Anything I have to be aware of?

    Thanks for any help!

    Greetings,
    Jack



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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

    On 18/09/2008 at 07:08, xxxxxxxx wrote:

    You have to pass an LineObject instead of a SplineObject. Also since the spline was probably a primitive it does not exist in a draw pipeline yet. You better use GenerateSplinePrimitive(). See attached code of the modified AtomObject example.

    > \> class AtomObject : public ObjectData \> { \>      private: \>           LineObject \*line; \>      public: \>           virtual Bool Init(GeListNode \*node); \>           virtual void Free(GeListNode\* node); \>           virtual Bool Draw(BaseObject\* op, LONG drawpass, BaseDraw\* bd, BaseDrawHelp\* bh); \>           virtual BaseObject\* GetVirtualObjects(PluginObject \*op, HierarchyHelp \*hh); \> \>           static NodeData \*Alloc(void) { return gNew AtomObject; } \> }; \> \> Bool AtomObject::Init(GeListNode \*node) \> { \>      BaseObject          \*op          = (BaseObject\* )node; \>      BaseContainer \*data = op->GetDataInstance(); \> \>      BaseContainer bc; \>      BaseObject \*spline = NULL; \>      spline = GenerateSplinePrimitive(node->GetDocument(), Osplinestar, bc, 1.0, NULL); \>      if(!spline) return FALSE; \> \>      line = ToSpline(spline)->GetLineObject(node->GetDocument(), 1.0, NULL); \>      if(!line) \>      { \>           BaseObject::Free(spline); \>           spline = NULL; \>           return FALSE; \>      } \> \>      return TRUE; \> } \> \> void AtomObject::Free(GeListNode \*node) \> { \>      if(line) LineObject::Free(line); \>      line = NULL; \> } \> \> Bool AtomObject::Draw(BaseObject \*op, LONG drawpass, BaseDraw \*bd, BaseDrawHelp \*bh) \> { \>      if(drawpass != DRAWPASS_OBJECT) return TRUE; \> \>      return bd->DrawObject(bh, line, drawpass); \> } \> \> BaseObject \*AtomObject::GetVirtualObjects(PluginObject \*op, HierarchyHelp \*hh) \> { \>      return NULL; \> } \>

    cheers,
    Matthias



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

    On 18/09/2008 at 09:05, xxxxxxxx wrote:

    Thanks! That sure looks like a good tip, should be included in the SDK.

    Unfortunately, still nothing is drawn :-(

    Anyway, I guess I have done something else wrong. Will work on this some more.

    Thanks again ;-)

    Greetings,
    Jack


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