better comments

12 years ago · b12b4ff429
parent fbfdcdb33f
commit b12b4ff429
1 changed files with 5 additions and 1 deletions
--- a/mandelbrot.c
+++ b/mandelbrot.c
@ -28,8 +28,12 @@ void drawmandelbrot(SDL_Surface *surface) {
    bool diverges = false;
    float complex z = 0;
    int it;
-    for (it = 1; it < 256; it++) {
+    const int max_it = 170;
+    for (it = 1; it <= max_it; it++) {
+      /* z = z² + c */
      z = cpowf(z, 2) + c;
+
+      /* If |z| ever gets greater than 2, it diverges. */
      if (cabs(z) > 2) {
        diverges = true;
        break;