Shapes/Arrow.hpp
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00001 
00002 //
00003 // Thor C++ Library
00004 // Copyright (c) 2011-2015 Jan Haller
00005 // 
00006 // This software is provided 'as-is', without any express or implied
00007 // warranty. In no event will the authors be held liable for any damages
00008 // arising from the use of this software.
00009 // 
00010 // Permission is granted to anyone to use this software for any purpose,
00011 // including commercial applications, and to alter it and redistribute it
00012 // freely, subject to the following restrictions:
00013 // 
00014 // 1. The origin of this software must not be misrepresented; you must not
00015 //    claim that you wrote the original software. If you use this software
00016 //    in a product, an acknowledgment in the product documentation would be
00017 //    appreciated but is not required.
00018 // 
00019 // 2. Altered source versions must be plainly marked as such, and must not be
00020 //    misrepresented as being the original software.
00021 // 
00022 // 3. This notice may not be removed or altered from any source distribution.
00023 //
00025 
00028 
00029 #ifndef THOR_ARROW_HPP
00030 #define THOR_ARROW_HPP
00031 
00032 #include <Thor/Config.hpp>
00033 
00034 #include <SFML/Graphics/Drawable.hpp>
00035 #include <SFML/Graphics/Transformable.hpp>
00036 #include <SFML/Graphics/ConvexShape.hpp>
00037 
00038 
00039 namespace thor
00040 {
00041 
00044 
00048 class THOR_API Arrow : public sf::Drawable, public sf::Transformable
00049 {
00050     // ---------------------------------------------------------------------------------------------------------------------------
00051     // Public types
00052     public:
00055         enum Style
00056         {
00057             Line,       
00058             Forward,    
00059         };
00060 
00061 
00062     // ---------------------------------------------------------------------------------------------------------------------------
00063     // Public static member functions
00064     public:
00068         static void                 setZeroVectorTolerance(float tolerance);
00069 
00072         static float                getZeroVectorTolerance();
00073 
00074 
00075     // ---------------------------------------------------------------------------------------------------------------------------
00076     // Public member functions
00077     public:
00083         explicit                    Arrow(sf::Vector2f position = sf::Vector2f(), sf::Vector2f direction = sf::Vector2f(),
00084                                         const sf::Color& color = sf::Color::White, float thickness = 3.f);
00085 
00088         void                        setDirection(sf::Vector2f direction);
00089 
00092         void                        setDirection(float dirX, float dirY);
00093 
00096         sf::Vector2f                getDirection() const;
00097 
00100         void                        setThickness(float thickness);
00101 
00104         float                       getThickness() const;
00105 
00108         void                        setColor(const sf::Color& color);
00109 
00112         sf::Color                   getColor() const;
00113 
00116         void                        setStyle(Style style);
00117 
00120         Style                       getStyle() const;
00121 
00122 
00123     // ---------------------------------------------------------------------------------------------------------------------------
00124     // Private member functions
00125     private:
00126         float                       getTriangleHeight() const;
00127         void                        adaptLine() const;
00128         void                        adaptTriangle() const;
00129         void                        draw(sf::RenderTarget& target, sf::RenderStates states) const;
00130 
00131 
00132     // ---------------------------------------------------------------------------------------------------------------------------
00133     // Private variables
00134     private:
00135         float                       mThickness;
00136         float                       mLength;
00137         sf::Vector2f                mDirection;
00138         sf::Color                   mColor;
00139         Style                       mStyle;
00140 
00141         mutable bool                mNeedsShapeUpdate;
00142         mutable sf::ConvexShape     mLine;
00143         mutable sf::ConvexShape     mTriangle;
00144 
00145         static float                zeroVectorTolerance;
00146 
00147 };
00148 
00150 
00151 } // namespace thor
00152 
00153 #endif // THOR_ARROW_HPP