src/tool/rectangle.h

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/******************************************************************************
 *  Wormux is a convivial mass murder game.
 *  Copyright (C) 2001-2004 Lawrence Azzoug.
 *
 *  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 2 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 a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
 ******************************************************************************
 * Rectangle.h: Standard C++ Rectangle template
 ******************************************************************************
 * 2005/09/21:  Jean-Christophe Duberga (jcduberga@gmx.de) 
 *              Initial version
 *****************************************************************************/

#ifndef _RECTANGLE_H
#define _RECTANGLE_H

#include <cmath>
#include "vector2.h"

template<class T> class rectangle
{
        protected:
                Vector2<T> position;
                Vector2<T> size; 

        public:
                inline rectangle(){
                }
                
                inline rectangle(T x, T y, T width, T height){
                        position.SetValues( x, y );
                        size.SetValues( width, height );
                }

                inline rectangle(Vector2<T> thePosition, Vector2<T> theSize){
                        position = thePosition;
                        size = theSize;
                }

                inline void SetPosition(T x, T y){
                        position.SetValues(x, y);
                }

                inline void SetPosition(const Vector2<T> &newPos){
                        position = newPos;
                }

                inline void SetPositionX(T x){
                        position.x = x;
                }

                inline void SetPositionY(T y){
                        position.y = y;
                }

                inline void SetSize(T sizeX, T sizeY){
                        size.SetValues(sizeX, sizeY);
                }

                inline void SetSizeX(T sizeX){
                        size.x = sizeX;
                }

                inline void SetSizeY(T sizeY){
                        size.y = sizeY;
                }

                inline void SetSize(Vector2<T> newSize){
                        size = newSize;
                }

                inline rectangle<T> GetRectangle() const{
                        return *this;
                }

                inline Vector2<T> GetPosition() const{
                        return position;
                }
                
                inline T GetPositionX() const{
                        return position.x;                      
                }

                inline T GetPositionY() const{
                        return position.y;
                }

                inline Vector2<T> GetSize() const{
                        return size;
                }
                
                inline T GetSizeX() const{
                        return size.x;
                }

                inline T GetSizeY() const{
                        return size.y;
                }

                void Clip( const rectangle &cr){
                        if( !Intersect(cr) ){
                                size.x = 0;
                                size.y = 0;

                                return;
                        }
                        
                        Vector2<T> newPositionBR = GetBottomRightPoint();

                        if( position.x < cr.position.x )
                                position.x = cr.position.x;
                        
                        if( position.x > cr.GetBottomRightPoint().x )
                                position.x = cr.GetBottomRightPoint().x;

                        if( position.y < cr.position.y )
                                position.y = cr.position.y;
                        
                        if( position.y > cr.GetBottomRightPoint().y )
                                position.y = cr.GetBottomRightPoint().y;

                        if( newPositionBR.x < cr.position.x )
                                newPositionBR.x = cr.position.x;
                        
                        if( newPositionBR.x > cr.GetBottomRightPoint().x )
                                newPositionBR.x = cr.GetBottomRightPoint().x;

                        if( newPositionBR.y < cr.position.y )
                                newPositionBR.y = cr.position.y;
                        
                        if( newPositionBR.y > cr.GetBottomRightPoint().y )
                                newPositionBR.y = cr.GetBottomRightPoint().y;

                        size = newPositionBR - position + 1 ;
                        assert( cr.Contains( *this ) );
                }

                inline bool Contains( const Vector2<T> p ) const{
                        if( IsSizeZero() )
                                return false;

                        return p >= GetTopLeftPoint() &&
                                p <= GetBottomRightPoint();
                }

                inline bool Contains( const rectangle<T> &r2 ) const{
                        if( r2.IsSizeZero() )
                                return false;
                        
                        return Contains( r2.GetTopLeftPoint() ) &&
                                Contains( r2.GetBottomRightPoint() );
                }

                inline bool Intersect( const rectangle<T> &r2 ) const{
                        if( IsSizeZero() || r2.IsSizeZero() )
                                return false;
                        
                        Vector2<T> r1BR = GetBottomRightPoint();
                        Vector2<T> r2BR = r2.GetBottomRightPoint();
                        Vector2<T> r1TL = GetTopLeftPoint();
                        Vector2<T> r2TL = r2.GetTopLeftPoint();

                        if( r1BR.x < r2TL.x || r1BR.y < r2TL.y ||
                                   r2BR.x < r1TL.x || r2BR.y < r1TL.y ) 
                                return false;

                        return true;
                }

                inline Vector2<T> GetTopLeftPoint() const{
                        assert( !IsSizeZero() );
                        return position;
                }

                inline Vector2<T> GetTopRightPoint() const{
                        assert( !IsSizeZero() );
                        Vector2<T> r = position;

                        r.x += size.x - 1;

                        return r;
                }

                inline Vector2<T> GetBottomLeftPoint() const{
                        assert( !IsSizeZero() );
                        Vector2<T> r = position;

                        r.y += size.y - 1;

                        return r;
                }

                inline Vector2<T> GetBottomRightPoint() const{
                        assert( !IsSizeZero() );
                        return position + size - 1;
                }

                inline bool IsSizeZero() const{
                        return size.IsXNull() || size.IsYNull();
                }
};

typedef rectangle<int>    Rectanglei;
typedef rectangle<float>  Rectanglef;
typedef rectangle<double> Rectangled;
#endif // _RECTANGLE_H

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