Initial commit.

.gitignore

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+main
+raylib

Makefile

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+main: main.c
+	gcc main.c -o main -I./raylib/include -L./raylib/lib -lraylib -lm

README.md

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+# Mandelbrot using Raylib
+
+Download [raylib](https://github.com/raysan5/raylib/releases) and extract it into `raylib`.
+
+Then run `make` and `./main`.
+

main.c

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+#include <assert.h>
+#include <math.h>
+#include <stdio.h>
+#include "raylib.h"
+
+#define WIDTH 800
+#define HEIGHT 600
+#define MAX_ITER 50 
+
+int mandelbrot(double x, double y) {
+    int k;
+    double u = 0.0;
+    double v = 0.0;
+    double u2 = 0.0;
+    double v2 = 0.0;
+
+    for (k = 1; k < MAX_ITER && (u2 + v2 < 4.0); k++) {
+        v = 2 * u * v + y;
+        u = u2 - v2 + x;
+        u2 = u * u;
+        v2 = v * v;
+    }
+
+    return k;
+}
+
+
+int main() {
+    InitWindow(WIDTH, HEIGHT, "Hello, raylib!");
+    
+    double re_start = -2.0;
+    double re_end = 1.0;
+    double im_start = -1.0;
+    double im_end = 1.0;
+
+    while (!WindowShouldClose()) {
+        BeginDrawing();
+        ClearBackground(RAYWHITE);
+        for (int x = 0; x < WIDTH; ++x) {
+            for (int y = 0; y < HEIGHT; ++y) {
+                double zreal = re_start + (x / (float) WIDTH) * (re_end - re_start);
+                double zimag = im_start + (y / (float) HEIGHT) * (im_end - im_start);
+                int m = mandelbrot(zreal, zimag);
+                assert(m >= 0 && m <= MAX_ITER);
+
+                unsigned char c = 255 - ((m * 255) / MAX_ITER);
+                Color color = { c, c, c, 255 };
+                DrawPixel(x, y, color);
+            }
+        }
+        EndDrawing();
+    }
+
+    CloseWindow();
+
+    return 0;
+}