Visualize Ngons

[Helper]

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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 21/04/2009 at 08:06, xxxxxxxx wrote:

User Information:
Cinema 4D Version:   R11.026 
Platform:   Windows  ;   Mac OSX  ; 
Language(s) :     C++  ;

---------
Hello,

i want to visualize ngons with the GetVirtualObject-Method in my generatorobject after i already visualized normal polygons. In principle my "datatype" has the same information as the code from the documentation below.

> \> BaseObject \*ret = BaseObject::Alloc(Onull); \> \> AutoAlloc<PolygonObject> obj(0,0); //begin of example \> if (!obj) return FALSE; \> \> AutoAlloc<Modeling> mod; \> if (!mod || !mod->InitObject(obj)) return FALSE; \> \> LONG a = mod->AddPoint(obj, Vector(0,0,0)); \> LONG b = mod->AddPoint(obj, Vector(100,0,0)); \> LONG c = mod->AddPoint(obj, Vector(150,50,0)); \> LONG d = mod->AddPoint(obj, Vector(100,100,0)); \> LONG e = mod->AddPoint(obj, Vector(0,100,0)); \> if (!a || !b || !c || !d || !e) return FALSE; \> \> LONG padr[] = {a,b,c,d,e}; \> LONG cnt = sizeof(padr)/sizeof(padr[0]); \> \> LONG i = mod->CreateNgon(obj, padr, cnt); \> if (!i) return FALSE; \> \> if (!mod->Commit()) return FALSE; //end of example \> \>    obj->InsertUnderLast(ret); \>

Did i forget something or did i overlook a fault?

Thanks for help

[Helper]

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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 22/04/2009 at 09:09, xxxxxxxx wrote:

Did i missed a step between
> mod->CreateNgon(obj, padr, cnt);
and
> obj->InsertUnderLast(ret)
to "connect" the ngon-information with the PolygonObject so that thePolygonObject internally generates polygons out of the ngons or something like that?
I don't find the missing link. I need a food for thought.

cheers

Oli

[Helper]

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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 22/04/2009 at 09:25, xxxxxxxx wrote:

This line looks wrong.

> AutoAlloc<PolygonObject> obj(0,0)

With AutoAlloc allocated objects have only a scope-based lifetime. The polygon object will not be avaible anymore after GetVirtualObjects() has been processed. Use PolygonObject::Alloc(0,0) instead in this case.

cheers,
Matthias

[Helper]

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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 23/04/2009 at 01:22, xxxxxxxx wrote:

It works :-).
What a stupid fault...oh my god.

Thanks a lot Matthias!

cheers,

Oli

[Helper]

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

On 29/04/2009 at 04:47, xxxxxxxx wrote:

Same Topic, other problem.

Now i want to visualize more than one ngon.

So i use a loop to allocate/free the memory of the PolygonObject and to insert them into the BaseObject.
In principle it looks like this.

> <code>BaseObject *ret = BaseObject::Alloc(Onull);
>
> AutoAlloc<Modeling> mod;
>
> for(LONG ngonCount = 0; ngonCount < ngons; ngonCount++){
>
> PolygonObject* obj = PolygonObject::Alloc(0,0);
>
> if (!obj) return FALSE;
>
> if (!mod || !mod->InitObject(obj)) return FALSE;
>
> LONG a = mod->AddPoint(obj, Vector(0,0,0));
>
> LONG b = mod->AddPoint(obj, Vector((ngonCount+1)*100,0,0));
>
> LONG c = mod->AddPoint(obj, Vector((ngonCount+1)*150,(ngonCount+1)*50,0));
>
> LONG d = mod->AddPoint(obj, Vector((ngonCount+1)*100,(ngonCount+1)*100,0));
>
> LONG e = mod->AddPoint(obj, Vector(0,(ngonCount+1)*100,0));
>
> if (!a || !b || !c || !d || !e) return FALSE;
>
> LONG padr[] = {a,b,c,d,e};
>
> LONG cnt = sizeof(padr)/sizeof(padr[0]);
>
> LONG i = mod->CreateNgon(obj, padr, cnt);
>
> if (!i) return FALSE;
>
> if (nognCount == ngons-1 && !mod->Commit()) return FALSE;
>
>    obj->InsertUnderLast(ret);
> }
> </code>

I know the values of the points not reallymake sense :-).

My problem is, that this solution worked yesterday and today every time i get a Modeling Kernel Error: internal Error.
I know i should not use Commit without arguments in a loop (->documentation), but i "commit" not before the last run.

And how i said, yesterday it worked.

If there was a magic dragon in my pc yesterday :-), has anybody an other idea to insert more than one ngon into the BaseObject or an idea why it works and than not.

cheers,

Oli

[Helper]

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

On 29/04/2009 at 05:29, xxxxxxxx wrote:

This seems to work fine here. Maybe just exchange the call to Commit() with mod- >Commit(obj, MODELING_COMMIT_NONE, NULL).

cheers,
Matthias

[Helper]

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

On 29/04/2009 at 07:05, xxxxxxxx wrote:

Thanks for the fast reply Matthias.
I have two things.
1.) If i exchange the call, i only see the last ngon i inserted, but it works :-).

2.) With your solution i was aible to isolate the fault. In the concrete case i wanted to create a cube with three ngons. So i copied the Cinema-Cube (position of points and the polygonpoints). Ngon 2 and 3 create the ground or rather the top. Ngon 1 should create the four sides of the cube.
So i get these three arrays for the polygonpoints:
Ngon 1: 0,1,3,2,2,3,5,4,4,5,7,6,6,7, 1 ,0
Ngon 2: 1,7,5,3
Ngon 3: 6,0,2,4

The marked "1" is the reason for the Modeling Kernel Error.

If i change the number to "3" for example it works. And if i change the call to Commit() again, i see all ngons :-).

So any idea why i get the error if there is a "1".

Thanks,

Oli

[Helper]

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

On 05/05/2009 at 07:41, xxxxxxxx wrote:

I solved the problem.
The process flow direction of the polygon was wrong at this point :-).