box.h

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/*== SAGITTARIUS =====================================================================
 * Copyright (c) 2012, Jesse K Medley
 * All rights reserved.

 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
    * Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.
    * Neither the name of The University of Washington nor the
      names of its contributors may be used to endorse or promote products
      derived from this software without specific prior written permission.

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

//== FILEDOC =========================================================================

//== BEGINNING OF CODE ===============================================================

#ifndef __SBNW_LAYOUT_BOX_H_
#define __SBNW_LAYOUT_BOX_H_

//== INCLUDES ========================================================================

#include "graphfab/core/SagittariusCore.h"
#include "graphfab/math/min_max.h"

//-- C++ code --
#ifdef __cplusplus

#include <graphfab/layout/point.h>

// #include <string>

#include <iostream>

namespace Graphfab {

    class Box {
        public:
            Box()
                {}
            
            Box(const Point& min, const Point& max)
                : _min(min), _max(max) { AT(_min.x <= _max.x && _min.y <= _max.y, "Min/max mismatch"); }
            
            Box(Real x1, Real y1, Real x2, Real y2)
                : _min(x1,y1), _max(x2,y2) {
                    if(!(_min.x <= _max.x && _min.y <= _max.y)) {
                        dump(std::cerr);
                        std::cerr << "\n";
                    }
                    AT(_min.x <= _max.x && _min.y <= _max.y, "Min/max mismatch");
                }
            
            const Point& getMin() const { return _min; }
            Real getMinX() const { return getMin().x; }
            Real getMinY() const { return getMin().y; }
            
            void setMin(const Point& p) { _min = p; }
            
            void setMinX(const Real x) { _min.x = x; }
            void setMinY(const Real y) { _min.y = y; }
            
            const Point& getMax() const { return _max; }
            Real getMaxX() const { return getMax().x; }
            Real getMaxY() const { return getMax().y; }
            
            void setMax(const Point& p) { _max = p; }
            
            void setMaxX(const Real x) { _max.x = x; }
            void setMaxY(const Real y) { _max.y = y; }
            
            Point getCenter() const { return (getMax() + getMin())/2.; }

            Point getFirstQuadCorner()  const { return getMax(); }
            Point getSecondQuadCorner() const { return Point(_min.x, _max.y); }
            Point getThirdQuadCorner()  const { return getMin(); }
            Point getFourthQuadCorner() const { return Point(_max.x, _min.y); }
            
            Point getDiag() const { return getMax() - getMin(); }
            
            Real maxDim() const {
                Real w = _max.x - _min.x;
                Real h = _max.y - _min.y;
                return max(w,h);
            }
            
            Real minDim() const {
                Real w = _max.x - _min.x;
                Real h = _max.y - _min.y;
                return min(w,h);
            }
            
            Point getTopRightCorner() const { return Point(_max.x, _min.y); }

            Point getBottomLeftCorner() const { return Point(_min.x, _max.y); }
            
            Real width() const { return _max.x - _min.x; }
            
            void setWidth(const Real w) { _max.x = _min.x+w; }
            
            Real height() const { return _max.y - _min.y; }
            
            void setHeight(const Real w) { _max.y = _min.y+w; }
            
            Real area() const {
                Real w = _max.x - _min.x;
                Real h = _max.y - _min.y;
                return w*h;
            }
            
            bool canShrink(const Real v) const {
                if(_min.x + 2*v <= _max.x && _min.y+2*v <= _max.y)
                    return true;
                else
                    return false;
            }
            
            Box shrink(const Real v) const {
                return Box(_min+Point(v,v), _max-Point(v,v));
            }
            
            void shrink_(const Real v) {
                _min.x += v;
                _min.y += v;
                _max.x -= v;
                _max.y -= v;
            }

            Box padded(const Real v) const {
                return Box(_min-Point(v,v), _max+Point(v,v));
            }
            
            // expand! to contain the other box and this box
            void expandx(const Box& other) {
                _min = Point::emin(_min, other._min);
                _max = Point::emax(_max, other._max);
            }

            void displace(const Point& d) {
                _min += d;
                _max += d;
            }
            
            void dump(std::ostream& o) const {
                o << "[" << getMin() << ", " << getMax() << "]";
            }
            
        protected:
            Point _min, _max;
    };
    
    std::ostream& operator<< (std::ostream& os, const Box& b);
    
    std::pair<bool, Point> intersectBoxLine(const Box& b, const Point& u, const Point& v);
    
}

#endif

#endif