Line.h

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#pragma once
 
#include <vector>
#include <exception>
 
#include "Point.h"
 
namespace Gorgon { namespace Geometry {
    
    template<class P_ = Pointf>
    class Line {
    public:
        
        Line() = default;
        
        Line(P_ start, P_ end) : Start(start), End(end) { }
        
        Float Slope() const {
            return Float(End.Y - Start.Y) / (End.X - Start.X);
        }
        
        Float Offset() const {
            return Start.Y - Slope() * Start.X;
        }
        
        Float SlopeInv() const {
            return Float(End.X - Start.X) / (End.Y - Start.Y);
        }
        
        Float OffsetInv() const {
            return Start.X - SlopeInv() * Start.Y;
        }
        
        typename P_::BaseType MinY() const {
            return Start.Y < End.Y ? Start.Y : End.Y;
        }
        
        typename P_::BaseType MaxY() const {
            return Start.Y > End.Y ? Start.Y : End.Y;
        }
        
        typename P_::BaseType MinX() const {
            return Start.X < End.X ? Start.X : End.X;
        }
        
        typename P_::BaseType MaxX() const {
            return Start.X > End.X ? Start.X : End.X;
        }
        
        int YDirection() const {
            return Sign(End.Y - Start.Y);
        }
        
        int XDirection() const {
            return Sign(End.X - Start.X);
        }
        
        P_ Start;
        
        P_ End;
    };
 
    
    //non-member operations: translate, scale, rotate, etc...
    
} }