feat(c): working mandelbrot

mandelbrot.c

@@ -7,10 +7,10 @@
 #define WIDTH 420
 #define HEIGHT 360
 
-#define X_MIN -1.0
-#define X_MAX 1.0
-#define Y_MIN -1.0
-#define Y_MAX 1.0
+#define X_MIN -2.0
+#define X_MAX 1.1
+#define Y_MIN -1.3
+#define Y_MAX 1.3
 
 #define SIZE (WIDTH * HEIGHT)
 
@@ -47,7 +47,7 @@ int main() {
 /////////////////////
 
 void cx_print(Complex z) {
-  printf("%f + %f i", z.real, z.imag);
+  printf("%f + %f i\n", z.real, z.imag);
 }
 
 static inline Complex cx_square(Complex z) {
@@ -72,11 +72,15 @@ static inline Complex f(Complex z, Complex c) {
 
 // return iteration count, MAX_DEPTH if diverge
 int diverge(Complex c) {
-  int counter = 0;
+  int depth = 0;
   Complex z = {0.0, 0.0};
-  for (z = f(z, c); cx_abs(z) < 2; counter++)
-    if (counter > MAX_DEPTH) return MAX_DEPTH;
-  return counter;
+  while (depth < MAX_DEPTH) {
+    z = f(z, c);
+    if (cx_abs(z) > 2)
+      return depth;
+    depth++;
+  }
+  return MAX_DEPTH;
 }
 
 Color color_map(int depth) {