// @(#)root/g3d:$Name:  $:$Id: TBRIK.cxx,v 1.2 2002/11/11 11:21:16 brun Exp $
// Author: Nenad Buncic   17/09/95

/*************************************************************************
 * Copyright (C) 1995-2000, 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 "TBRIK.h"
#include "TNode.h"
#include "TVirtualPad.h"

#include "TVirtualGL.h"

ClassImp(TBRIK)


//______________________________________________________________________________
// 

// BRIK is a box with faces perpendicular to the axes. It has 6 parameters:
//
//     - name       name of the shape
//     - title      shape's title
//     - material  (see TMaterial)
//     - dx         half-length of the box along the x-axis
//     - dy         half-length of the box along the y-axis
//     - dz         half-length of the box along the z-axis




//______________________________________________________________________________
 TBRIK::TBRIK()
{
//*-*-*-*-*-*-*-*-*-*-*-*-*BRIK shape default constructor*-*-*-*-*-*-*-*-*-*-*-*
//*-*                      ==============================

}


//______________________________________________________________________________
 TBRIK::TBRIK(const char *name, const char *title, const char *material, Float_t dx, Float_t dy, Float_t dz)
      : TShape (name, title,material)
{
//*-*-*-*-*-*-*-*-*-*-*-*-*BRIK shape normal constructor*-*-*-*-*-*-*-*-*-*-*-*-*
//*-*                      =============================

    fDx = dx;
    fDy = dy;
    fDz = dz;
}


//______________________________________________________________________________
 TBRIK::~TBRIK()
{
//*-*-*-*-*-*-*-*-*-*-*-*-*BRIK shape default destructor*-*-*-*-*-*-*-*-*-*-*-*-*
//*-*                      =============================

}


//______________________________________________________________________________
 Int_t TBRIK::DistancetoPrimitive(Int_t px, Int_t py)
{
//*-*-*-*-*-*-*-*Compute distance from point px,py to a BRIK*-*-*-*-*-*-*
//*-*            ===========================================
//*-*
//*-*  Compute the closest distance of approach from point px,py to each corner
//*-*  point of the BRIK.
//*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
   const Int_t numPoints = 8;
   return ShapeDistancetoPrimitive(numPoints,px,py);
}

//______________________________________________________________________________
 void TBRIK::Paint(Option_t *option)
{
//*-*-*-*-*-*-*-*Paint this 3-D shape with its current attributes*-*-*-*-*-*-*-*
//*-*            ==================================================

   const Int_t numpoints = 8;

//*-* Allocate memory for points *-*

   Float_t *points = new Float_t[3*numpoints];
   if (!points) return;

   SetPoints(points);

   Bool_t rangeView = option && *option && strcmp(option,"range")==0 ? kTRUE : kFALSE;
   if (!rangeView  && gPad->GetView3D()) PaintGLPoints(points);

 //==  for (Int_t i = 0; i < numpoints; i++)
 //            gNode->Local2Master(&points[3*i],&points[3*i]);


   Int_t c = ((GetLineColor() % 8) - 1) * 4;     // Basic colors: 0, 1, ... 7
   if (c < 0) c = 0;

//*-* Allocate memory for segments *-*

    X3DBuffer *buff = new X3DBuffer;
    if (buff) {
        buff->numPoints = 8;
        buff->numSegs   = 12;
        buff->numPolys  = 6;
    }

//*-* Allocate memory for points *-*

    buff->points = points;
    buff->segs = new Int_t[buff->numSegs*3];
    if (buff->segs) {
        buff->segs[ 0] = c;    buff->segs[ 1] = 0;    buff->segs[ 2] = 1;
        buff->segs[ 3] = c+1;  buff->segs[ 4] = 1;    buff->segs[ 5] = 2;
        buff->segs[ 6] = c+1;  buff->segs[ 7] = 2;    buff->segs[ 8] = 3;
        buff->segs[ 9] = c;    buff->segs[10] = 3;    buff->segs[11] = 0;
        buff->segs[12] = c+2;  buff->segs[13] = 4;    buff->segs[14] = 5;
        buff->segs[15] = c+2;  buff->segs[16] = 5;    buff->segs[17] = 6;
        buff->segs[18] = c+3;  buff->segs[19] = 6;    buff->segs[20] = 7;
        buff->segs[21] = c+3;  buff->segs[22] = 7;    buff->segs[23] = 4;
        buff->segs[24] = c;    buff->segs[25] = 0;    buff->segs[26] = 4;
        buff->segs[27] = c+2;  buff->segs[28] = 1;    buff->segs[29] = 5;
        buff->segs[30] = c+1;  buff->segs[31] = 2;    buff->segs[32] = 6;
        buff->segs[33] = c+3;  buff->segs[34] = 3;    buff->segs[35] = 7;
    }

//*-* Allocate memory for polygons *-*

    buff->polys = new Int_t[buff->numPolys*6];
    if (buff->polys) {
        buff->polys[ 0] = c;   buff->polys[ 1] = 4;  buff->polys[ 2] = 0;
        buff->polys[ 3] = 9;   buff->polys[ 4] = 4;  buff->polys[ 5] = 8;
        buff->polys[ 6] = c+1; buff->polys[ 7] = 4;  buff->polys[ 8] = 1;
        buff->polys[ 9] = 10;  buff->polys[10] = 5;  buff->polys[11] = 9;
        buff->polys[12] = c;   buff->polys[13] = 4;  buff->polys[14] = 2;
        buff->polys[15] = 11;  buff->polys[16] = 6;  buff->polys[17] = 10;
        buff->polys[18] = c+1; buff->polys[19] = 4;  buff->polys[20] = 3;
        buff->polys[21] = 8;   buff->polys[22] = 7;  buff->polys[23] = 11;
        buff->polys[24] = c+2; buff->polys[25] = 4;  buff->polys[26] = 0;
        buff->polys[27] = 3;   buff->polys[28] = 2;  buff->polys[29] = 1;
        buff->polys[30] = c+3; buff->polys[31] = 4;  buff->polys[32] = 4;
        buff->polys[33] = 5;   buff->polys[34] = 6;  buff->polys[35] = 7;
    }

    //*-* Paint in the pad
    PaintShape(buff,rangeView);

    if (strstr(option, "x3d")) {
        if(buff && buff->points && buff->segs)
            FillX3DBuffer(buff);
        else {
            gSize3D.numPoints -= buff->numPoints;
            gSize3D.numSegs   -= buff->numSegs;
            gSize3D.numPolys  -= buff->numPolys;
        }
    }

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

}

//______________________________________________________________________________
 void TBRIK::PaintGLPoints(Float_t *vertex)
{
//*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*Paint BRIK via OpenGL *-*-*-*-*-*-*-*-*-*-*-*-*
//*-*                            =====================
    gVirtualGL->PaintBrik(vertex);
}

//______________________________________________________________________________
 void TBRIK::SetPoints(Float_t *buff)
{
//*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*Create BRIK points*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
//*-*                            ==================

    if (buff) {
        buff[ 0] = -fDx;    buff[ 1] = -fDy;    buff[ 2] = -fDz;
        buff[ 3] =  fDx;    buff[ 4] = -fDy;    buff[ 5] = -fDz;
        buff[ 6] =  fDx;    buff[ 7] =  fDy;    buff[ 8] = -fDz;
        buff[ 9] = -fDx;    buff[10] =  fDy;    buff[11] = -fDz;
        buff[12] = -fDx;    buff[13] = -fDy;    buff[14] =  fDz;
        buff[15] =  fDx;    buff[16] = -fDy;    buff[17] =  fDz;
        buff[18] =  fDx;    buff[19] =  fDy;    buff[20] =  fDz;
        buff[21] = -fDx;    buff[22] =  fDy;    buff[23] =  fDz;
    }
}


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

    gSize3D.numPoints += 8;
    gSize3D.numSegs   += 12;
    gSize3D.numPolys  += 6;
}