Mandelbrot Set & Julia Set Explorer using HTML 5 Canvas element and JavaScript

written by Mike Harris, based on algorithms in The Science of Fractal Images. Fork this at GitHub

Click on the Mandelbrot set on left to see the corresponding Julia set on the right and the co-ordinates below. If you turn Autodraw Julia Set Mode on (toggle with the A key) then the Julia Set will draw automatically just by moving the mouse over the Mandelbrot Set. Feel free to play with the number of iterations. The higher the better the fidelity of the drawing, but the slower it is to draw.

There is a Zoom function, enabled by hitting the Z key over the Mset canvas. To zoom in click the left mouse button, to zoom out, click the right. When you're happy with the zoom window hit enter to redraw.

Colouring method: Level Set Method (LSM) Distance Estimator Method (DEM) Binary Decomposition Method (BDM) Trinary Decomposition Method (TDM) Binary Decomposition Method II (BDM2) Palette: Iterations: threshold:   threshold:   overflow: Redraw MSet JSet mode: Autodraw Julia Set Mode Off Autodraw Julia Set Mode On

cx: cy:   redraw julia set

mset: x_min = y_min = x_max = y_max = Reset

zoom: zoom_x = zoom_y = zoom_w = zoom_h =

There's also an archive of old Fractal work I did with Dan Grace back in the Eighties on the Fractal Engine archive site.