Dev - Also, on form submission, use GD to resize the image as a new thumbnail file
Dev - In the submission form, you can now upload a banner image
Mandelbrot Fractal Explorer
To use, click and drag the image on the screen to move the preview window around, and use the mouse wheel to zoom in and out (a tiny bit quirky, as it offsets to the upper left). Once you've got an image you want to render in full resolution, press the space bar, and wait for GM to finish. In about 10 minutes, your computer will have used GM to render part of the Mandelbrot Fractal!
If you want an even higher quality image, try going into the key press event for the draw object, and change the resolution argument from 1 to .5. This will increase the time it takes to render, but will also add some anti-aliasing to the image.
The code used in this example was mostly lifted from a previously written example on Mandelbrot, found <a href="http://plus.maths.org/issue9/features/mandelbrot/index.html">here</a>. I won't pretend to be much of an authority on math, and credit is due to the maker of this site.
If you use this example to create anything, credit to me is appreciated but not required. Enjoy!