#include "GL_Sphere.h"
#include "X3D_Sphere.h"
#include "SphereDrawArray.h"

namespace X3DTK {
namespace GL {

Sphere::Sphere()
: X3DGeometryNode(), _sphereArray(0)
{
  define(Recorder<Sphere>::getTypeName("Sphere", "Geometry3D"));
  
  define(Recorder<Sphere, SFFloat>::getAttribute("radius", &Sphere::_radius, 0.0f));
}

Sphere::~Sphere()
{
  _sphereArray->removeInstance();
}

void Sphere::setRadius(const SFFloat &radius)
{
  _radius = radius;
}

void Sphere::setSphereDrawArray(SphereDrawArray *sphereArray)
{
  _sphereArray = sphereArray;
}

void Sphere::update()
{
  if (x3dReference == 0)
    return;
    
  X3D::Sphere *S = static_cast<X3D::Sphere *>(x3dReference);

  _radius = S->getRadius();
  _sphereArray = SphereDrawArray::getInstanceOfSection(64); 
}

void Sphere::draw() const
{
  glEnable(GL_CULL_FACE);
  glFrontFace(GL_CW);
  glCullFace(GL_BACK);    
  glPushMatrix();
  glScalef(_radius, _radius, _radius);  

  glInterleavedArrays(GL_N3F_V3F, 0, _sphereArray->getSphereVertexArrayAddress());
  glDrawElements(GL_TRIANGLES, _sphereArray->getSphereSize(), GL_UNSIGNED_INT, _sphereArray->getSphereIndexArrayAddress());

  glPopMatrix();
  glDisable(GL_CULL_FACE);
}

}
}