Lamps

This past week I took a job offer to do a quick applet for Fabripod. Fabripod wants to sell lamps, and they want to let people customize them to their liking – in particular, they wanted an online interface (aka an Applet) to let people control various parameters, and immediately see the resulting figure. Like this:

progress1

You basically partition the sphere into a set of quads (which are actually trapezoids), and then draw shapes projecting out from each normal. It’s much easier to act as if every quad has its own coordinate system and then transform the shape accordingly. It’s also quite amazing how fast one can develop with the right tools; this first sketch took less than a day to mock up.

progress2

Added a few more options and some indicators; by associating each indicator with a function that will calculate its value, it’s easy to simulate the displayed text as a def instead of a var.

progress3

This is basically the final version; it’s amazing what some good lights can do to a sketch. About halfway through this picture and the previous one I had to do a lot of code rewriting in order to cache; this involved changing most of my defs into vars and then doing “mutate on UI change” acrobatics. Pleasantly, the sketch runs at ~40 fps for almost all use cases (using software 3D rendering, since exporting an Applet using OPENGL is difficult).

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