// $Header$

#include "BoxSetGL.h"
#include <Reve/BoxSet.h>

#include <TGLDrawFlags.h>
#ifdef WIN32
#include "Windows4root.h"
#endif
#include <GL/gl.h>
#include <GL/glu.h>

using namespace Reve;

//______________________________________________________________________
// BoxSetGL
//

ClassImp(BoxSetGL)

BoxSetGL::BoxSetGL() : fM(0)
{
  // fCached = false; // Disable display list.
}

BoxSetGL::~BoxSetGL()
{}

/**************************************************************************/

Bool_t BoxSetGL::SetModel(TObject* obj)
{
  Bool_t isok = SetModelCheckClass(obj, Reve::BoxSet::Class());
  fM = isok ? dynamic_cast<Reve::BoxSet*>(obj) : 0;
  return isok;
}

void BoxSetGL::SetBBox()
{
  SetAxisAlignedBBox(fM->AssertBBox());
}

/**************************************************************************/

void BoxSetGL::DirectDraw(const TGLDrawFlags& /*flags*/) const
{
  BoxSet& mB = * fM;
  // printf("BoxSetGL::DirectDraw N boxes %d\n", mB.fBoxes.size());
  if(mB.fBoxes.size() == 0)
    return;

  glPushAttrib(GL_ENABLE_BIT | GL_POLYGON_BIT);
  glColorMaterial(GL_FRONT_AND_BACK, GL_DIFFUSE);
  glEnable(GL_COLOR_MATERIAL);
  glDisable(GL_CULL_FACE);
  if (mB.fRenderMode == BoxSet::RM_Fill) {
    glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
  } else if (mB.fRenderMode == BoxSet::RM_Line) {
    glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
    glDisable(GL_LIGHTING);
  }
  UChar_t defCol[4];
  Reve::ColorFromIdx(mB.fDefaultColor, defCol);

  if (mB.fRenderMode != BoxSet::RM_Line) {

    glBegin(GL_QUADS);
    for(std::vector<Box>::iterator q=mB.fBoxes.begin(); q!=mB.fBoxes.end(); ++q) {
      UChar_t* c = q->color;
      if (c[3] == 0 && c[2] == 0 && c[1] == 0 && c[0] == 0) {
	glColor4ubv(defCol);
      } else {
	glColor4ubv(c);
      }

      // bottom: 3210
      glNormal3f(0, 0, -1);
      glVertex3fv(q->vertices + 9);  glVertex3fv(q->vertices + 6);
      glVertex3fv(q->vertices + 3);  glVertex3fv(q->vertices);
      // top:   4567
      glNormal3f(0, 0, 1);
      glVertex3fv(q->vertices + 12); glVertex3fv(q->vertices + 15);
      glVertex3fv(q->vertices + 18); glVertex3fv(q->vertices + 21);
      // front: 0154
      glNormal3f(0, -1, 0);
      glVertex3fv(q->vertices);      glVertex3fv(q->vertices + 3);
      glVertex3fv(q->vertices + 15); glVertex3fv(q->vertices + 12);
      // back:  7623
      glNormal3f(0, 1, 0);
      glVertex3fv(q->vertices + 21); glVertex3fv(q->vertices + 18);
      glVertex3fv(q->vertices + 6);  glVertex3fv(q->vertices + 9);
      // left:  4730
      glNormal3f(-1, 0, 0);
      glVertex3fv(q->vertices + 12); glVertex3fv(q->vertices + 21);
      glVertex3fv(q->vertices + 9);  glVertex3fv(q->vertices);
      // right: 5126
      glNormal3f(1, 0, 0);
      glVertex3fv(q->vertices + 15); glVertex3fv(q->vertices + 3);
      glVertex3fv(q->vertices + 6);  glVertex3fv(q->vertices + 18);
    }
    glEnd();

  } else {

    for(std::vector<Box>::iterator q=mB.fBoxes.begin(); q!=mB.fBoxes.end(); ++q) {
      UChar_t* c = q->color;
      if (c[3] == 0 && c[2] == 0 && c[1] == 0 && c[0] == 0) {
	glColor4ubv(defCol);
      } else {
	glColor4ubv(c);
      }

      // bottom: 3210
      glBegin(GL_LINE_LOOP);
      glVertex3fv(q->vertices + 9);  glVertex3fv(q->vertices + 6);
      glVertex3fv(q->vertices + 3);  glVertex3fv(q->vertices);
      glEnd();
      // top:   4567
      glBegin(GL_LINE_LOOP);
      glVertex3fv(q->vertices + 12); glVertex3fv(q->vertices + 15);
      glVertex3fv(q->vertices + 18); glVertex3fv(q->vertices + 21);
      glEnd();
      // front: 0154
      glBegin(GL_LINE_LOOP);
      glVertex3fv(q->vertices);      glVertex3fv(q->vertices + 3);
      glVertex3fv(q->vertices + 15); glVertex3fv(q->vertices + 12);
      glEnd();
      // back:  7623
      glBegin(GL_LINE_LOOP);
      glVertex3fv(q->vertices + 21); glVertex3fv(q->vertices + 18);
      glVertex3fv(q->vertices + 6);  glVertex3fv(q->vertices + 9);
      glEnd();
      // left:  4730
      glBegin(GL_LINE_LOOP);
      glVertex3fv(q->vertices + 12); glVertex3fv(q->vertices + 21);
      glVertex3fv(q->vertices + 9);  glVertex3fv(q->vertices);
      glEnd();
      // right: 5126
      glBegin(GL_LINE_LOOP);
      glVertex3fv(q->vertices + 15); glVertex3fv(q->vertices + 3);
      glVertex3fv(q->vertices + 6);  glVertex3fv(q->vertices + 18);
      glEnd();
    }

  }

  glPopAttrib();
}