#include "GL_BBoxDrawArray.h"

using namespace std;

namespace X3DTK {
namespace GL {

BBoxDrawArray::BBoxDrawArray()
: h(0.1f)
{
  MFVec3f vertexArray(8);
  vertexArray[0] = SFVec3f(-1.0f, -1.0f, -1.0f);
  vertexArray[1] = SFVec3f(1.0f, -1.0f, -1.0f);
  vertexArray[2] = SFVec3f(1.0f, 1.0f, -1.0f);
  vertexArray[3] = SFVec3f(-1.0f, 1.0f, -1.0f);
  vertexArray[4] = SFVec3f(-1.0f, -1.0f, 1.0f);
  vertexArray[5] = SFVec3f(1.0f, -1.0f, 1.0f);
  vertexArray[6] = SFVec3f(1.0f, 1.0f, 1.0f);
  vertexArray[7] = SFVec3f(-1.0f, 1.0f, 1.0f);
  
  unsigned int k = 0;
  for (MFVec3f::const_iterator it = vertexArray.begin(); it != vertexArray.end(); ++it)
  {
    SFVec3f vx, vy, vz;
    SFVec3f dx(1.0f, 0.0f, 0.0f), dy(0.0f, 1.0f, 0.0f), dz(0.0f, 0.0f, 1.0f);
    SFVec3f v = *it;
    _BBoxVertexArray.push_back(v);
    unsigned int ko = k;
    
    if (v.x < 0.0f)
      vx = v + h*dx;
    else  
      vx = v - h*dx;
    _BBoxVertexArray.push_back(vx);
    _BBoxIndexArray.push_back(ko);
    ++k;
    _BBoxIndexArray.push_back(k);
         
      
    if (v.y < 0.0f)
      vy = v + h*dy;
    else  
      vy = v - h*dy;
    _BBoxVertexArray.push_back(vy);
    _BBoxIndexArray.push_back(ko);
    ++k;
    _BBoxIndexArray.push_back(k);
     
    if (v.z < 0.0f)
      vz = v + h*dz;
    else  
      vz = v - h*dz;    
    _BBoxVertexArray.push_back(vz);
    _BBoxIndexArray.push_back(ko);
    ++k;
    _BBoxIndexArray.push_back(k);  
    ++k;
  }
}

unsigned int BBoxDrawArray::getBBoxSize() const
{
  return _BBoxIndexArray.size();
}

const void *BBoxDrawArray::getBBoxVertexArrayAddress() const
{
  return &_BBoxVertexArray.front();
}

const unsigned int *BBoxDrawArray::getBBoxIndexArrayAddress() const
{
  return &_BBoxIndexArray.front(); 
}

}
}