/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_6_2_5/src/Fireworks/Vertices/src/TEveEllipsoid.cc

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#include "Fireworks/Vertices/interface/TEveEllipsoid.h"
#include "TEveTrans.h"
#include "TEveProjectionManager.h"
#include "TMath.h"

//______________________________________________________________________________
TEveEllipsoid::TEveEllipsoid(const Text_t* n, const Text_t* t) :
   TEveShape(n, t)
{
   // Constructor.
}

//______________________________________________________________________________
void TEveEllipsoid::ComputeBBox()
{
   // Compute bounding-box of the data.

   BBoxInit();

   Float_t a = TMath::Max(TMath::Max(TMath::Abs(fExtent3D[0]), TMath::Abs(fExtent3D[1])), TMath::Abs(fExtent3D[2]));

   fBBox[0] = -a +fPos[0];
   fBBox[1] =  a +fPos[0];

   fBBox[2] = -a +fPos[1];
   fBBox[3] =  a +fPos[1];

   fBBox[4] = -a +fPos[2];
   fBBox[5] =  a +fPos[2];
}

//______________________________________________________________________________
TClass* TEveEllipsoid::ProjectedClass(const TEveProjection*) const
{
   // Virtual from TEveProjectable, returns TEveEllipsoidProjected class.

   return TEveEllipsoidProjected::Class();
}

//==============================================================================
// TEveEllipsoidProjected
//==============================================================================

//______________________________________________________________________________
//
// Projection of TEveEllipsoid.

//______________________________________________________________________________
TEveEllipsoidProjected::TEveEllipsoidProjected(const char* n, const char* t) :
   TEveShape(n, t)
{
   // Constructor.
}

//______________________________________________________________________________
TEveEllipsoidProjected::~TEveEllipsoidProjected()
{
   // Destructor.
}

//______________________________________________________________________________
void TEveEllipsoidProjected::ComputeBBox()
{
   // Compute bounding-box, virtual from TAttBBox.

   BBoxInit();
   

   TEveEllipsoid    *e3d = dynamic_cast<TEveEllipsoid*>(fProjectable);

   //printf("project bbox  %p\n", (void*)e3d->GetBBox());
   if ( e3d ) {
      TEveProjection *proj = GetManager()->GetProjection();
      Float_t a = TMath::Max(TMath::Max(TMath::Abs(e3d->RefExtent3D()[0]), TMath::Abs(e3d->RefExtent3D()[1])), TMath::Abs(e3d->RefExtent3D()[2]));
      float* p = e3d->RefPos().Arr(); 
      float b[] = {-a + p[0], a + p[0], -a + p[1], a + p[1], -a + p[2], a + p[2] };
      TEveVector v;
      v.Set(b[0],b[2], b[4]); proj->ProjectVector(v, fDepth); BBoxCheckPoint(v);
      v.Set(b[1],b[2], b[4]); proj->ProjectVector(v, fDepth); BBoxCheckPoint(v);
      v.Set(b[0],b[3], b[4]); proj->ProjectVector(v, fDepth); BBoxCheckPoint(v);
      v.Set(b[1],b[3], b[4]); proj->ProjectVector(v, fDepth); BBoxCheckPoint(v);
      v.Set(b[0],b[2], b[5]); proj->ProjectVector(v, fDepth); BBoxCheckPoint(v);
      v.Set(b[1],b[2], b[5]); proj->ProjectVector(v, fDepth); BBoxCheckPoint(v);
      v.Set(b[0],b[3], b[5]); proj->ProjectVector(v, fDepth); BBoxCheckPoint(v);
      v.Set(b[1],b[3], b[5]); proj->ProjectVector(v, fDepth); BBoxCheckPoint(v);

      // for Z dimesion
      fBBox[4] -= a;
      fBBox[5] += a;

   }
   // printf("(%f, %f) (%f, %f) (%f, %f)\n",fBBox[0],fBBox[1],fBBox[2],fBBox[3],fBBox[4],fBBox[5] );
}

//______________________________________________________________________________
void TEveEllipsoidProjected::SetDepthLocal(Float_t d)
{
   // This is virtual method from base-class TEveProjected.

   SetDepthCommon(d, this, fBBox);
}

//______________________________________________________________________________
void TEveEllipsoidProjected::SetProjection(TEveProjectionManager* mng, TEveProjectable* model)
{
   // This is virtual method from base-class TEveProjected.

   TEveProjected::SetProjection(mng, model);
   CopyVizParams(dynamic_cast<TEveElement*>(model));
}

//______________________________________________________________________________
void TEveEllipsoidProjected::UpdateProjection()
{
   // Override from abstract function.
}