Added plotting screen

include/Signal.hpp

@@ -0,0 +1,27 @@
+#pragma once
+
+#include <complex>
+#include <deque>
+
+typedef std::complex<double> CmplxDouble;
+
+typedef struct {
+	double t;
+	CmplxDouble val;
+	bool valid = true;
+} Sample;
+
+static const Sample invalidSample{ 0.f, 0.f, false };
+
+class Signal
+{
+public:
+	Signal() = default;
+	~Signal() = default;
+
+	friend Signal& operator<<(Signal& sig, const Sample& sample);
+	friend Signal& operator>>(Signal& sig, Sample& sample);
+
+private:
+	std::deque<Sample> buffer;
+};

include/screens/PlotScreen.hpp

@@ -0,0 +1,29 @@
+#pragma once
+#include <mutex>
+#include <vector>
+#include <SDL.h>
+#include "../Screen.hpp"
+#include "Signal.hpp"
+
+typedef struct {
+	double x, y, w, h;
+} fRect;
+
+class PlotScreen : public Screen
+{
+public:
+	PlotScreen(SDL_Renderer* renderer, Signal* dataSource,
+		int x, int y, int w, int h, 
+		double minX, double minY, double maxX, double maxY);
+	~PlotScreen();
+
+	void Update() override;
+	void Render(SDL_Renderer* renderer) override;
+
+private:
+	void SignalToSampleList(std::vector<Sample>& container, uint32_t maxSamples = 0);
+	void SampleListToPointList(const std::vector<Sample>& source, std::vector<SDL_Point>& container);
+
+	fRect plotRect;
+	Signal* dataSource;
+};