Plotter.h

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#pragma once
 
#include <functional>
#include <SFML/Graphics/RenderTarget.hpp>
#include <SFML/Graphics/RenderWindow.hpp>
 
#include "sgui/Render/PrimitiveShapeRender.h"
 
namespace sgui
{
struct PlotRange {
  PlotRange () = default;
  PlotRange (const float mi, const float ma)
    : min (mi), max (ma) {}
  float min = 0.f; 
  float max = 1.f; 
};
 

class Plotter : public sf::Drawable, public sf::Transformable
{
public:
  void setSample (const uint32_t sample);
  void unsetBound ();
  void setBound (const sf::Vector2f& plotBound);
  void setBorderTick (const uint32_t count);
  void setBorderWidth (const float thickness);
  void setBorderColor (const sf::Color& color);
  void clear ();
  void plot (const std::function<float (float)>& slope, const sf::Vector2f& position, const sf::Color& lineColor, const float thickness = 1.f);
  void plot (const std::function<sf::Vector2f (float)>& slope, const sf::Vector2f& position, const sf::Color& lineColor, const float thickness = 1.f);
  void plot (const std::vector <sf::Vector2f>& points, const sf::Vector2f& position, const sf::Color& lineColor, const float thickness);
public:
  PlotRange xRange = {};       
  PlotRange yRange = {};       
  PrimitiveShapeRender render; 
private:
  // to remap value in the draw area
  sf::Vector2f toPlot (const float pointX, const float pointY) const;
  sf::Vector2f toPlot (const sf::Vector2f& point) const;
  // plot boundaries and axes for bounded plot
  void drawBorderAndAxes (const sf::Vector2f& position);
  // draw all function plotted
  void draw (sf::RenderTarget& target, sf::RenderStates states) const override;
private:
  bool mBounded = false;
  uint32_t mSample = 50;
  uint32_t mBorderTick = 5;
  float mBorderWidth = 4.f;
  sf::Vector2f mBound = {};
  sf::Color mBorderColor = sf::Color::White;
};
 
} // namespace sgui