//*CMZ :  2.00/12 20/09/98  00.13.05  by  Rene Brun
//*CMZ :  2.00/11 18/08/98  10.10.01  by  Rene Brun
//*CMZ :  2.00/09 23/06/98  17.01.55  by  Rene Brun
//*CMZ :  2.00/00 17/02/98  16.01.56  by  Rene Brun
//*CMZ :  1.03/09 07/12/97  16.59.17  by  Fons Rademakers
//*-- Author :    Nenad Buncic   17/08/95

//*KEEP,CopyRight,T=C.
/*************************************************************************
 * Copyright(c) 1995-1998, The ROOT System, All rights reserved.         *
 * Authors: Rene Brun, Nenad Buncic, Valery Fine, Fons Rademakers.       *
 *                                                                       *
 * Permission to use, copy, modify and distribute this software and its  *
 * documentation for non-commercial purposes is hereby granted without   *
 * fee, provided that the above copyright notice appears in all copies   *
 * and that both the copyright notice and this permission notice appear  *
 * in the supporting documentation. The authors make no claims about the *
 * suitability of this software for any purpose.                         *
 * It is provided "as is" without express or implied warranty.           *
 *************************************************************************/
//*KEND.

#include <fstream.h>
#include <iostream.h>

//*KEEP,TROOT.
#include "TROOT.h"
//*KEEP,TPolyLine3D.
#include "TPolyLine3D.h"
//*KEEP,TVirtualPad.
#include "TVirtualPad.h"
//*KEEP,TPostScript.
#include "TPostScript.h"
//*KEEP,TGXW.
#include "TGXW.h"
//*KEEP,TPoint.
#include "TPoint.h"
//*KEEP,TGLKernelABC,T=C++.
#include "TGLKernelABC.h"
//*KEEP,TView.
#include "TView.h"
//*KEEP,TPadView3D,T=C++.
#include "TPadView3D.h"
//*KEND.

ClassImp(TPolyLine3D)

//______________________________________________________________________________
// PolyLine3D is a 3-dimensional polyline. It has 4 different constructors.
//
//   First one, without any parameters TPolyLine3D(), we call 'default
// constructor' and it's used in a case that just an initialisation is
// needed (i.e. pointer declaration).
//
//       Example:
//                 TPolyLine3D *pl1 = new TPolyLine3D;
//
//
//   Second one is 'normal constructor' with, usually, one parameter
// n (number of points), and it just allocates a space for the points.
//
//       Example:
//                 TPolyLine3D pl1(150);
//
//
//   Third one allocates a space for the points, and also makes
// initialisation from the given array.
//
//       Example:
//                 TPolyLine3D pl1(150, pointerToAnArray);
//
//
//   Fourth one is, almost, similar to the constructor above, except
// initialisation is provided with three independent arrays (array of
// x coordinates, y coordinates and z coordinates).
//
//       Example:
//                 TPolyLine3D pl1(150, xArray, yArray, zArray);
//





//______________________________________________________________________________
 TPolyLine3D::TPolyLine3D()
{
//*-*-*-*-*-*-*-*-*-*-*-*-*3-D PolyLine default constructor*-*-*-*-*-*-*-*-*-*-*
//*-*                      ================================

   fP = 0;

}


//______________________________________________________________________________
 TPolyLine3D::TPolyLine3D(Int_t n, Option_t *option)
{
//*-*-*-*-*-*3-D PolyLine normal constructor without initialisation*-*-*-*-*-*-*
//*-*        ======================================================
//*-*  If n < 0 the default size (2 points) is set
//*-*
   if (n < 1) fN = 2;  // Set the default size for this object
   else fN = n;

   fP = new Float_t[3*fN];
   for (Int_t i=0; i<3*fN; i++) fP[i] = 0;
   fOption = option;
}


//______________________________________________________________________________
 TPolyLine3D::TPolyLine3D(Int_t n, Float_t *p, Option_t *option)
{
//*-*-*-*-*-*-*-*-*-*-*-*-*3-D PolyLine normal constructor*-*-*-*-*-*-*-*-*-*-*-*
//*-*                      ===============================
//*-*  If n < 0 the default size (2 points) is set
//*-*

   if (n < 1) fN = 2;  // Set the default size for this object
   else fN = n;

   fP = new Float_t[3*fN];
   if (n > 0)
     for (Int_t i=0; i<3*n; i++) {
        fP[i] = p[i];
     }
   else
     for (Int_t i=0; i<3*fN; i++) {
        fP[i] = 0;
     }
   fOption = option;
}


//______________________________________________________________________________
 TPolyLine3D::TPolyLine3D(Int_t n, Float_t *x, Float_t *y, Float_t *z, Option_t *option)
{
//*-*-*-*-*-*-*-*-*-*-*-*-*3-D PolyLine normal constructor*-*-*-*-*-*-*-*-*-*-*-*
//*-*                      ===============================
//*-*  If n < 0 the default size (2 points) is set
//*-*

   if (n < 1) fN = 2;  // Set the default size for this object
   else fN = n;

   fP = new Float_t[3*fN];
   Int_t j = 0;
   if (n > 0) {
       for (Int_t i=0; i<n;i++) {
           fP[j]   = x[i];
           fP[j+1] = y[i];
           fP[j+2] = z[i];
           j += 3;
       }
   }
   else {
     for (Int_t i=0; i<3*fN; i++) {
        fP[i] = 0;
     }
   }
   fOption = option;
}


//______________________________________________________________________________
 TPolyLine3D::~TPolyLine3D()
{
//*-*-*-*-*-*-*-*-*-*-*-*-*3-D PolyLine default destructor*-*-*-*-*-*-*-*-*-*-*-*
//*-*                      ===============================

   if (fP) delete [] fP;

}


//______________________________________________________________________________
 TPolyLine3D::TPolyLine3D(const TPolyLine3D &polyline)
{
   ((TPolyLine3D&)polyline).Copy(*this);
}


//______________________________________________________________________________
 void TPolyLine3D::Copy(TObject &obj)
{
//*-*-*-*-*-*-*-*-*-*-*-*-*Copy this polyline to polyline*-*-*-*-*-*-*-*-*-*-*-*
//*-*                      ==============================

   TObject::Copy(obj);
   TAttLine::Copy(((TPolyLine3D&)obj));
   ((TPolyLine3D&)obj).fN = fN;
   if (((TPolyLine3D&)obj).fP)
      delete [] ((TPolyLine3D&)obj).fP;
   ((TPolyLine3D&)obj).fP = new Float_t[3*fN];
   for (Int_t i=0; i<3*fN;i++)  {((TPolyLine3D&)obj).fP[i] = fP[i];}
   ((TPolyLine3D&)obj).fOption = fOption;
}


//______________________________________________________________________________
 Int_t TPolyLine3D::DistancetoPrimitive(Int_t px, Int_t py)
{
//*-*-*-*-*-*-*-*Compute distance from point px,py to a 3-D polyline*-*-*-*-*-*-*
//*-*            ===================================================
//*-*
//*-*  Compute the closest distance of approach from point px,py to each segment
//*-*  of the polyline.
//*-*  Returns when the distance found is below DistanceMaximum.
//*-*  The distance is computed in pixels units.
//*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*

   const Int_t inaxis = 7;
   Int_t dist = 9999;

   Int_t puxmin = gPad->XtoAbsPixel(gPad->GetUxmin());
   Int_t puymin = gPad->YtoAbsPixel(gPad->GetUymin());
   Int_t puxmax = gPad->XtoAbsPixel(gPad->GetUxmax());
   Int_t puymax = gPad->YtoAbsPixel(gPad->GetUymax());

//*-*- return if point is not in the user area
   if (px < puxmin - inaxis) return dist;
   if (py > puymin + inaxis) return dist;
   if (px > puxmax + inaxis) return dist;
   if (py < puymax - inaxis) return dist;

   TView *view = gPad->GetView();
   if (!view) return dist;

   Int_t i, dsegment;
   Float_t x1,y1,x2,y2, xndc[3];
   for (i=0;i<fN-1;i++) {
      view->WCtoNDC(&fP[3*i], xndc);
      x1 = xndc[0];
      y1 = xndc[1];
      view->WCtoNDC(&fP[3*i+3], xndc);
      x2 = xndc[0];
      y2 = xndc[1];
      dsegment = DistancetoLine(px,py,x1,y1,x2,y2);
      if (dsegment < dist) dist = dsegment;
   }
   return dist;
}


//______________________________________________________________________________
 void TPolyLine3D::Draw(Option_t *option)
{
//*-*-*-*-*-*-*-*Draw this 3-D polyline with its current attributes*-*-*-*-*-*-*
//*-*            ==================================================

   AppendPad(option);

}


//______________________________________________________________________________
 void TPolyLine3D::DrawPolyLine(Int_t n, Float_t *p, Option_t *option)
{
//*-*-*-*-*-*-*-*-*Draw this 3-D polyline with new coordinates*-*-*-*-*-*-*-*-*-*
//*-*              ============================================

   TPolyLine3D *newpolyline = new TPolyLine3D();
   newpolyline->fN =n;
   newpolyline->fP = new Float_t[3*fN];
   for (Int_t i=0; i<3*fN;i++) { newpolyline->fP[i] = p[i];}
   TAttLine::Copy(*newpolyline);
   newpolyline->fOption = fOption;
   newpolyline->SetBit(kCanDelete);
   newpolyline->AppendPad(option);
}

//______________________________________________________________________________
 void TPolyLine3D::ExecuteEvent(Int_t event, Int_t px, Int_t py)
{
//*-*-*-*-*-*-*-*-*-*Execute action corresponding to one event*-*-*-*-*-*-*-*-*-*
//*-*                =========================================


        if (gPad->GetView())
                gPad->GetView()->ExecuteRotateView(event, px, py);

}

//______________________________________________________________________________
 void TPolyLine3D::ls(Option_t *option)
{
//*-*-*-*-*-*-*-*-*-*List this 3-D polyline with its attributes*-*-*-*-*-*-*
//*-*                ==========================================

   IndentLevel();
   cout <<"PolyLine3D  N=" <<fN<<" Option="<<option<<endl;

}

//______________________________________________________________________________
 void TPolyLine3D::Paint(Option_t *option)
{
//*-*-*-*-*-*-*-*-*Paint this 3-D polyline with its current attributes*-*-*-*-*
//*-*              ===================================================
//*-*
//*-* Option could be 'x3d', and it means that output
//*-* will be performed by X3D package.
//*-*
//*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*

    //*-* Check whether there is some 3D view class for this TPad
    TPadView3D *view3D = gPad->GetView3D();
    if (view3D) view3D->PaintPolyLine(this,option);

    //*-* Check if option is 'x3d'.      NOTE: This is a simple checking
    //                                         but since there is no other
    //                                         options yet, this works fine.
    if ((*option != 'x') && (*option != 'X')) {
        PaintPolyLine(fN, fP, option);
    }
    else {
        X3DBuffer *buff = new X3DBuffer;
        if (buff) {
            buff->numPoints = fN;
            buff->numSegs   = fN-1;
            buff->numPolys  = 0;        //NOTE: Because of different structure, our
            buff->polys     = NULL;     //      TPolyLine3D can't use polygons
            buff->points    = fP;
        }

        Int_t c = ((GetLineColor() % 8) - 1) * 4;     // Basic colors: 0, 1, ... 8
        if (c < 0) c = 0;

    //*-* Allocate memory for segments *-*
        buff->segs = new Int_t[buff->numSegs*3];
        if (buff->segs) {
            for (Int_t i = 0; i < buff->numSegs; i++) {
                buff->segs[3*i  ] = c;
                buff->segs[3*i+1] = i;
                buff->segs[3*i+2] = i+1;
            }
        }


        if (buff && buff->points && buff->segs) //If everything seems to be OK ...
            FillX3DBuffer(buff);
        else {                            // ... something very bad was happened
            gSize3D.numPoints -= buff->numPoints;
            gSize3D.numSegs   -= buff->numSegs;
            gSize3D.numPolys  -= buff->numPolys;
        }

        if (buff->segs)     delete [] buff->segs;
        if (buff->polys)    delete [] buff->polys;
        if (buff)           delete    buff;
    }
}


//______________________________________________________________________________
 void TPolyLine3D::PaintPolyLine(Int_t n, Float_t *p, Option_t *)
{
//*-*-*-*-*-*-*-*-*Draw this 3-D polyline with new coordinates*-*-*-*-*-*-*-*-*-*
//*-*              ===========================================

   if (n < 2) return;

   TAttLine::Modify();  //Change line attributes only if necessary

//*-*- Loop on each individual line

   for (Int_t i=1;i<n;i++) {
      gPad->PaintLine3D(&p[3*i-3], &p[3*i]);
   }
}

//______________________________________________________________________________
 void TPolyLine3D::Print(Option_t *option)
{
//*-*-*-*-*-*-*-*-*-*Dump this 3-D polyline with its attributes*-*-*-*-*-*-*-*-*
//*-*                ==========================================

   cout <<"    TPolyLine3D Printing N=" <<fN<<" Option="<<option<<endl;

}

//______________________________________________________________________________
 void TPolyLine3D::SavePrimitive(ofstream &out, Option_t *)
{
    // Save primitive as a C++ statement(s) on output stream out

   char quote = '"';
   out<<"   "<<endl;
   if (gROOT->GetCount(kPolyLine3D)) {
       out<<"   ";
   } else {
       out<<"   TPolyLine3D *";
       gROOT->SetCount(kPolyLine3D,1);
   }
   out<<"pline3D = new TPolyLine3D("<<fN<<","<<quote<<fOption<<quote<<");"<<endl;

   SaveLineAttributes(out,"pline3D",1,1,1);

   for (Int_t i=0;i<fN;i++) {
      out<<"   pline3D->SetPoint("<<i<<","<<fP[3*i]<<","<<fP[3*i+1]<<","<<fP[3*i+2]<<");"<<endl;
   }
   out<<"   pline3D->Draw();"<<endl;
}

//______________________________________________________________________________
 void TPolyLine3D::SetPoint(Int_t n, Float_t x, Float_t y, Float_t z)
{
//*-*-*-*-*-*-*-*-*-*Initialize one point of the 3-D polyline*-*-*-*-*-*-*-*-*-*
//*-*                ========================================
//*-*  if n is more then the current TPolyLine3D size (n > fN) - re-allocate this
//*-*

   if (n < 0) return;
   if (n >= fN)
   {
   // re-allocate the object
      Float_t *savepoint = new Float_t [3*(n+1)];
      if (fN > 0)
        memcpy(savepoint,fP,3*fN*sizeof(Float_t));
      if (fP) delete [] fP;
      fP = savepoint;
   }

   fP[3*n  ] = x;
   fP[3*n+1] = y;
   fP[3*n+2] = z;
}


//______________________________________________________________________________
 void TPolyLine3D::SetPolyLine(Int_t n, Float_t *p, Option_t *option)
{
//*-*-*-*-*-*-*-*-*-*-*Set new values for this 3-D polyline*-*-*-*-*-*-*-*-*-*-*
//*-*                  ====================================

   fN =n;
   if (fP) delete [] fP;
   fP = new Float_t[3*fN];
   for (Int_t i=0; i<3*fN;i++) {
      if (p) fP[i] = p[i];
   }
   fOption = option;

}

//______________________________________________________________________________
 void TPolyLine3D::Sizeof3D() const
{
//*-*-*-*-*-*Return total X3D size of this shape with its attributes*-*-*-*-*-*-*
//*-*        =======================================================

    gSize3D.numPoints += fN;
    gSize3D.numSegs   += (fN-1);
    gSize3D.numPolys  += 0;

}


//_______________________________________________________________________
 void TPolyLine3D::Streamer(TBuffer &b)
{
//*-*-*-*-*-*-*-*-*Stream a class object*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
//*-*              =========================================
   if (b.IsReading()) {
      b.ReadVersion();  //Version_t v = b.ReadVersion();
      TObject::Streamer(b);
      TAttLine::Streamer(b);
      b >> fN;
      if (fN) {
         fP = new Float_t[3*fN];
         b.ReadFastArray(fP,3*fN);
      }
      fOption.Streamer(b);
   } else {
      b.WriteVersion(TPolyLine3D::IsA());
      TObject::Streamer(b);
      TAttLine::Streamer(b);
      b << fN;
      if (fN) b.WriteFastArray(fP, 3*fN);
      fOption.Streamer(b);
   }
}