Mandelbrot set: Difference between revisions

Implementation in Google Dart, works on httphttps://try.dartlang.org/ (as of 10/18/2011) since the language is very new, it may break in the futuredartpad.dev

The implementation uses aan incomplete Complex class supporting operator overloading.

<syntaxhighlight lang="dart">class Complex {

double _r, _i;

Complex(this._r, this._i);

double get r => _r;

double get i => _i;

String toString() => "($r,$i)";

Complex operator +(Complex other) => new Complex(r + other.r, i + other.i);

Complex operator *(Complex other) =>

new Complex(r * other.r - i * other.i, r * other.i + other.r * i);

double abs() => r * r + i * i;

doubleconst startX start_x= -1.5;

doubleconst startY start_y= -1.0;

doubleconst stepX step_x= 0.03;

doubleconst stepY step_y= 0.1;

for (int y = 0; y < 20; y++) {

String line = "";

for (int x = 0; x < 70; x++) {

Complexvar c =new Complex(start_xstartX +step_x stepX * x,start_y startY +step_y stepY * y);

Complexvar z =new Complex(0.0, 0.0);

for (int i = 0; i < 100; i++) {

z = z *( z) + c;

if (z.abs() > 2) {

line += z.abs() > 2 ? " " : "*";