TPointSet3D.cxx

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// @(#)root/g3d:$Id$
// Author: Matevz Tadel  7/4/2006

/*************************************************************************
 * Copyright (C) 1995-2006, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/

#include "TPointSet3D.h"
#include "TBuffer.h"
#include "TClass.h"

/** \class TPointSet3D
\ingroup g3d

TPolyMarker3D using TPointSet3DGL for direct OpenGL rendering.
Supports only elementary marker types:
  - 4, 20, 24 : round points, size in pixels;
  - 2, 3, 5 : crosses, size in scene units;
  - 28 : as above, line width 2 pixels;
  - all other : square points, size in pixels.

Marker-size (from TAttMarker) is multiplied by 5!

An identification of type TObject* can be assigned to each point
via SetPointId() method. Set the fOwnIds flag if the ids are owned
by the point-set and should be deleted when pointset is cleared or
destructed.

Copy-constructor and assignment operator COPIES the ids if the are
not owned and CLONES them if they are owned.

The ids are not streamed.
*/

ClassImp(TPointSet3D);

////////////////////////////////////////////////////////////////////////////////
/// Copy constructor.

TPointSet3D::TPointSet3D(const TPointSet3D &t) :
   TPolyMarker3D(t), TAttBBox(t), fOwnIds(kFALSE), fIds()
{
   CopyIds(t);
}

////////////////////////////////////////////////////////////////////////////////
/// Destructor.

TPointSet3D::~TPointSet3D()
{
   ClearIds();
}

////////////////////////////////////////////////////////////////////////////////
/// Copy id objects from point-set 't'.

void TPointSet3D::CopyIds(const TPointSet3D& t)
{
   fOwnIds = t.fOwnIds;
   fIds.Expand(t.fIds.GetSize());
   if (fOwnIds) {
      for (Int_t i=0; i<t.fIds.GetSize(); ++i)
         fIds.AddAt(t.fIds.At(i)->Clone(), i);
   } else {
      for (Int_t i=0; i<t.fIds.GetSize(); ++i)
         fIds.AddAt(t.fIds.At(i), i);
   }
}

////////////////////////////////////////////////////////////////////////////////
/// Assignment operator.

TPointSet3D& TPointSet3D::operator=(const TPointSet3D& t)
{
   if (this != &t) {
      ClearIds();
      TPolyMarker3D::operator=(t);
      CopyIds(t);
   }
   return *this;
}

////////////////////////////////////////////////////////////////////////////////
/// Compute the bounding box of this points set.

void TPointSet3D::ComputeBBox()
{
   if (Size() > 0) {
      BBoxInit();
      Int_t    n = Size();
      Float_t* p = fP;
      for (Int_t i = 0; i < n; ++i, p += 3) {
         BBoxCheckPoint(p);
      }
   } else {
      BBoxZero();
   }
}
////////////////////////////////////////////////////////////////////////////////
/// Set id of last point.
/// Use this method if you also use TPolyMarker3D::SetNextPoint().

void TPointSet3D::SetPointId(TObject* id)
{
   SetPointId(fLastPoint, id);
}

////////////////////////////////////////////////////////////////////////////////
/// Set id of point n.

void TPointSet3D::SetPointId(Int_t n, TObject* id)
{
   if (n >= fN) return;
   if (fN > fIds.GetSize())
      fIds.Expand(fN);
   fIds.AddAt(id, n);
}

////////////////////////////////////////////////////////////////////////////////
/// Clears the id-array. If ids are owned the TObjects are deleted.

void TPointSet3D::ClearIds()
{
   if (fOwnIds) {
      for (Int_t i=0; i<fIds.GetSize(); ++i)
         delete GetPointId(i);
   }
   fIds.Expand(0);
}

////////////////////////////////////////////////////////////////////////////////
/// This virtual method is called from TPointSet3DGL when a point is
/// selected.
///
/// At this point it just prints out n and id of the point (if it exists).
/// To make something useful out of this do:
///
///  1. subclass and re-implement this method;
///  2. extend this class to include TExec or some other kind of callback.

void TPointSet3D::PointSelected(Int_t n)
{
   TObject* id = GetPointId(n);
   printf("TPointSet3D::PointSelected n=%d, id=(%s*)0x%lx\n",
          n, id ? id->IsA()->GetName() : "void", (ULong_t)id);
   if (id)
      id->Print();
}

////////////////////////////////////////////////////////////////////////////////
/// Stream an object of class TPointSet3D.

void TPointSet3D::Streamer(TBuffer &R__b)
{
   if (R__b.IsReading()) {
      R__b.ReadClassBuffer(TPointSet3D::Class(), this);
      if (fOwnIds) {
         Int_t n;
         R__b >> n;
         for (Int_t i=0; i<n; ++i) {
            TObject* o = (TObject*) R__b.ReadObjectAny(TObject::Class());
            if (gDebug > 0) { printf("Read[%2d]: ", i); o->Print(); }
         }
      }
   } else {
      R__b.WriteClassBuffer(TPointSet3D::Class(), this);
      if (fOwnIds) {
         R__b << fIds.GetEntries();
         TObject* o;
         TIter next(&fIds);
         while ((o = next())) {
            if (gDebug > 0) { printf("Writing: "); o->Print(); }
            R__b.WriteObjectAny(o, TObject::Class());
         }
      }
   }
}