Multimedia/ConcaveShape.hpp

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//
// Thor C++ Library
// Copyright (c) 2011-2012 Jan Haller
// 
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
// 
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
// 
// 1. The origin of this software must not be misrepresented; you must not
//    claim that you wrote the original software. If you use this software
//    in a product, an acknowledgment in the product documentation would be
//    appreciated but is not required.
// 
// 2. Altered source versions must be plainly marked as such, and must not be
//    misrepresented as being the original software.
// 
// 3. This notice may not be removed or altered from any source distribution.
//


#ifndef THOR_CONCAVESHAPE_HPP
#define THOR_CONCAVESHAPE_HPP

#include <Thor/Math/TriangulationFigures.hpp>
#include <Thor/SmartPtr/CopiedPtr.hpp>
#include <Thor/Detail/Swap.hpp>
#include <Thor/Config.hpp>

#include <SFML/Graphics/Drawable.hpp>
#include <SFML/Graphics/Transformable.hpp>
#include <SFML/Graphics/Color.hpp>

#include <vector>


namespace sf
{

    class Shape;

} // namespace sf


namespace thor
{


class THOR_API ConcaveShape : public sf::Drawable, public sf::Transformable
{
    // ---------------------------------------------------------------------------------------------------------------------------
    // Public member functions
    public:
                                    ConcaveShape();
                            
                                    ConcaveShape(const sf::Shape& shape);

        void                        Swap(ConcaveShape& other);

        
        void                        SetPointCount(unsigned int count);

        unsigned int                GetPointCount() const;

        void                        SetPoint(unsigned int index, sf::Vector2f position);

        sf::Vector2f                GetPoint(unsigned int index) const;

        void                        SetFillColor(const sf::Color& fillColor);

        void                        SetOutlineColor(const sf::Color& outlineColor);

        sf::Color                   GetFillColor() const;

        sf::Color                   GetOutlineColor() const;

        void                        SetOutlineThickness(float outlineThickness);
        
        float                       GetOutlineThickness() const;
        

    // ---------------------------------------------------------------------------------------------------------------------------
    // Private types
    private:            
        // Container typedefs
        typedef std::vector< CopiedPtr<sf::Shape> > ShapeContainer;
        typedef std::vector< Vertex >               PointContainer;
        typedef std::vector< Edge<Vertex> >         EdgeContainer;

        struct TriangleGenerator;


    // ---------------------------------------------------------------------------------------------------------------------------
    // Private member functions
    private:
        // Renders the shape to target.
        virtual void                Draw(sf::RenderTarget& target, sf::RenderStates states) const;
        
        // Computes how the shape can be split up into convex triangles.
        void                        Decompose() const;
                
        // Forms the outline out of the given edges.
        void                        FormOutline() const;


    // ---------------------------------------------------------------------------------------------------------------------------
    // Private variables
    private:
        PointContainer              mPoints;
        sf::Color                   mFillColor;
        sf::Color                   mOutlineColor;
        float                       mOutlineThickness;

        mutable EdgeContainer       mEdges;
        mutable ShapeContainer      mTriangleShapes;
        mutable ShapeContainer      mEdgeShapes;
        mutable bool                mNeedsTriangleUpdate;
        mutable bool                mNeedsEdgeUpdate;
};

THOR_GLOBAL_SWAP(ConcaveShape)



} // namespace thor

#endif // THOR_CONCAVESHAPE_HPP