| *** Mandelbrot demo *** | |
| Controls: | |
| * Left mouse button to center view at a point. | |
| * Drag vertically with left mouse button to zoom in and out. | |
| Be sure to enable SSE2 or AltiVec to improve performance. | |
| The number of iterations, and the choice between single and double precision, are | |
| determined at runtime depending on the zoom level. | |