Mandelbrot explorer

C++/Mandelbrot explorer/main.cpp

@@ -0,0 +1,70 @@
+#include <iostream>
+#include <map>
+
+#define OLC_PGE_APPLICATION
+#include "olcPixelGameEngine.h"
+
+class Mandelbrot : public olc::PixelGameEngine {
+public:
+    Mandelbrot() {
+        sAppName = "Mandelbrot set";
+    }
+
+    bool OnUserCreate() override {
+        return true;
+    }
+
+    bool OnUserUpdate(float fElapsedTime) override {
+        #pragma omp parallel for schedule(dynamic)
+        for (int pX = 0; pX < 1000; pX++) {
+            float mX = ((float)pX - 1000.0f / 2.0f) / 100 * m_scale - 1 + m_x;
+            #pragma omp parallel for schedule(dynamic)
+            for (int pY = 0; pY < 600; pY++) {
+                float mY = (600.0f / 2.0f - (float)pY) / 100 * m_scale - 1 + m_y;
+
+                float x = 0.0f; float y = 0.0f;
+                int iteration = 0;
+                while ((x * x) + (y * y) <= 2 * 2 && iteration < m_maxIterations) {
+                    float tX = (x * x) - (y * y) + mX;
+                    y = (2 * x * y) + mY;
+                    x = tX;
+                    iteration++;
+                }
+                olc::Pixel colour = olc::Pixel(iteration * 2, iteration * 2, iteration * 2);
+                DrawRect(pX, pY, 1, 1, colour);
+            }
+        }
+        // m_scale -= 0.01f;
+
+        if (GetKey(olc::Key::W).bHeld)
+            m_y *= 1.01f;
+        if (GetKey(olc::Key::S).bHeld)
+            m_y /= 1.01f;
+        if (GetKey(olc::Key::D).bHeld)
+            m_x *= 1.01f;
+        if (GetKey(olc::Key::A).bHeld)
+            m_x /= 1.01f;
+        if (GetKey(olc::Key::DOWN).bHeld)
+            m_scale *= 1.01f;
+        if (GetKey(olc::Key::UP).bHeld)
+            m_scale /= 1.01f;
+
+        std::cout << "Render time: " << fElapsedTime << std::endl;
+        return true;
+    }
+private:
+    float m_x = 1.0f;
+    float m_y = 1.0f;
+    float m_scale = 0.7f;
+    int m_maxIterations = 100;
+    std::map<int, olc::Pixel> m_palete;
+};
+
+int main(int argc, char** argv) {
+    Mandelbrot app;
+
+    app.Construct(1000, 600, 1, 1);
+    app.Start();
+
+    return 0;
+}