AABB.cpp

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/*
  Copyright (C) 2011 Jon Macey

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received m_a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
#include "AABB.h"
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
namespace ngl
{

//-----------------------------------------------------------------------------
AABB::AABB()noexcept
{
  m_corner.set(0.0f,0.0f,0.0f,1.0f);

  m_x = 1.0f;
  m_y = 1.0f;
  m_z = 1.0f;
}
//-----------------------------------------------------------------------------
AABB::AABB(const Vec4 &_corner,  Real _x,  Real _y,  Real _z ) noexcept
{
 set(_corner,_x,_y,_z);
}

//-----------------------------------------------------------------------------
AABB::~AABB()
{

}
//-----------------------------------------------------------------------------
void AABB::set(const Vec4 &_corner,Real _x,Real _y, Real _z ) noexcept
{
  m_corner=_corner;

  if (_x < 0.0f)
  {
    _x = -_x;
    m_corner.m_x -= _x;
  }
  if (_y < 0.0f)
  {
    _y = -_y;
    m_corner.m_y -= _y;
  }
  if (_z < 0.0f)
  {
    _z = -_z;
    m_corner.m_z -= _z;
  }
  m_x = _x;
  m_y = _y;
  m_z = _z;
}

Vec3 AABB::getVertexP(const Vec3 &_normal) const noexcept
{
  Vec3 res = m_corner.toVec3();

  if (_normal.m_x > 0.0f)
  {
    res.m_x += m_x;
  }
  if (_normal.m_y > 0.0f)
  {
    res.m_y += m_y;
  }

  if (_normal.m_z > 0.0f)
  {
    res.m_z += m_z;
  }
  return res;
}

Vec3 AABB::getVertexN(const Vec3 &_normal) const noexcept
{
  Vec3 res = m_corner.toVec3();

  if (_normal.m_x < 0.0f)
  {
    res.m_x += m_x;
  }
  if (_normal.m_y < 0.0f)
  {
    res.m_y += m_y;
  }

  if (_normal.m_z < 0.0f)
  {
    res.m_z += m_z;
  }
  return res;
}


} // end of ngl namespace