OpenSceneGraph/src/osg/BoundingBox.cpp

/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2005 Robert Osfield 
 *
 * This library is open source and may be redistributed and/or modified under  
 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
 * (at your option) any later version.  The full license is in LICENSE file
 * included with this distribution, and on the openscenegraph.org website.
 * 
 * This library 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 
 * OpenSceneGraph Public License for more details.
*/
#include <osg/BoundingBox>
#include <osg/BoundingSphere>

using namespace osg;

void BoundingBox::expandBy(const BoundingBox& bb)
{
    if (!bb.valid()) return;

    if(bb._min.x()<_min.x()) _min.x() = bb._min.x();
    if(bb._max.x()>_max.x()) _max.x() = bb._max.x();

    if(bb._min.y()<_min.y()) _min.y() = bb._min.y();
    if(bb._max.y()>_max.y()) _max.y() = bb._max.y();

    if(bb._min.z()<_min.z()) _min.z() = bb._min.z();
    if(bb._max.z()>_max.z()) _max.z() = bb._max.z();
}


void BoundingBox::expandBy(const BoundingSphere& sh)
{
    if (!sh.valid()) return;

    if(sh._center.x()-sh._radius<_min.x()) _min.x() = sh._center.x()-sh._radius;
    if(sh._center.x()+sh._radius>_max.x()) _max.x() = sh._center.x()+sh._radius;

    if(sh._center.y()-sh._radius<_min.y()) _min.y() = sh._center.y()-sh._radius;
    if(sh._center.y()+sh._radius>_max.y()) _max.y() = sh._center.y()+sh._radius;

    if(sh._center.z()-sh._radius<_min.z()) _min.z() = sh._center.z()-sh._radius;
    if(sh._center.z()+sh._radius>_max.z()) _max.z() = sh._center.z()+sh._radius;
}