Drawing a spline

Helper

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On 07/02/2011 at 13:59, xxxxxxxx wrote:

Oh, thanks, couldn't imagine it's different in C++, but now i know better.

Helper

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On 07/02/2011 at 14:05, xxxxxxxx wrote:

Howdy,

Yeah, coffee is very similar to c++, but from what I remember about coffee, there were more functions you had to call to perform an operation, where in c++ you simply performed the operation.

Adios,
Cactus Dan

Helper

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On 07/02/2011 at 16:04, xxxxxxxx wrote:

hey scott would you mind sharing with me the final working code you got. The4 code above keeps making my c4d crash out.

Thanks,

Shawn

Helper

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On 07/02/2011 at 21:11, xxxxxxxx wrote:

Sure. Here's the code again:

SplineObject *sp = SplineObject::Alloc(3, SPLINETYPE_LINEAR); // create a linear spline with 3 verts
if(!sp) return NULL;
doc->InsertObject(sp, NULL, NULL, 0); // Add it to the OM

Vector *gp = sp->GetPointW();// The point array of the spline
gp[0] = Vector(10,0,-100);// Place the first point here
gp[1] = Vector(0,0,0);// Place the first point here
gp[2] = Vector(-10,0,100);// Place the first point here
EventAdd();//Update all the changes
sp->Message(MSG_UPDATE);

I'm a little surprised that there's no code block formatting option for this forum. To make posting code snippets easier to read.

-ScottA

Helper

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On 07/02/2011 at 21:30, xxxxxxxx wrote:

why not use [*code] [/*code](without * ) ?

Helper

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On 08/02/2011 at 01:08, xxxxxxxx wrote:

Originally posted by xxxxxxxx

I'm a little surprised that there's no code block formatting option for this forum. To make posting code snippets easier to read.

There is, please check the BBCodes avaible for the forum:
<[URL-REMOVED]>

cheers,
Matthias

[URL-REMOVED] @maxon: This section contained a non-resolving link which has been removed.

Helper

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On 08/02/2011 at 01:16, xxxxxxxx wrote:

Originally posted by xxxxxxxx

I looked at the Circle.cpp example. But It's dealing with creating a spline primitive. Not a new spline from scratch. So I'm still not sure how to properly create a spline from scratch

I was refering to this part of the circle.cpp example. It shows how to set up a Bezier spline.

  
SplineObject *GenerateCircle(Real rad)  
{  
  #define TANG 0.415  
  
  Real    sn,cs;  
  LONG    i,sub=4;  
  
  SplineObject *op = SplineObject::Alloc(sub*2,SPLINETYPE_BEZIER);  
  if (!op || !op->MakeVariableTag(Tsegment,2)) { blDelete(op); return NULL; }  
  op->GetDataInstance()->SetBool(SPLINEOBJECT_CLOSED,TRUE);  
  
  Vector  *padr = op->GetPointW();  
  Tangent *hadr = op->GetTangentW();  
  Segment *sadr = op->GetSegmentW();  
  
  if (sadr)  
  {  
      sadr[0].closed = TRUE;  
      sadr[0].cnt    = sub;  
      sadr[1].closed = TRUE;  
      sadr[1].cnt    = sub;  
  }  
  
  if (hadr && padr)  
  {  
      for (i=0; i<sub; i++)  
      {  
          SinCos(2.0*pi*i/Real(sub),sn,cs);  
            
          padr[i]    = Vector(cs*rad,sn*rad,0.0);  
          hadr[i].vl = Vector(sn*rad*TANG,-cs*rad*TANG,0.0);  
          hadr[i].vr = -hadr[i].vl;  
  
          padr[i+sub]    = Vector(cs*rad,sn*rad,0.0)*0.5;  
          hadr[i+sub].vl = Vector(sn*rad*TANG,-cs*rad*TANG,0.0)*0.5;  
          hadr[i+sub].vr = -hadr[i+sub].vl;  
      }  
  }  
  
  op->Message(MSG_UPDATE);  
  
  return op;  
}

op- >Message(MSG_UPDATE) is needed to update the object.

EventAdd() is used to update managers like the Object manager. So only have to call it when you add new objects to the scene for example.

cheers,
Matthias

Helper

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On 08/02/2011 at 03:25, xxxxxxxx wrote:

Thanks Matthias.. That helped a ton. I've got it figured out now.

Helper

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On 08/02/2011 at 08:13, xxxxxxxx wrote:

Thanks Matthias.

If it's something that you can easily do. Could you possibly add the code block icon to the top of the message creation window with the other icons?

If it's a hassle to enable it. Don't sweat it.

-ScottA

Helper

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On 08/02/2011 at 09:41, xxxxxxxx wrote:

When I type in code examples I usually just type [*code] My Code [*/code] without the * as mentioned above.