I’ve created PiGlow, a tiny library to manipulate the PiGlow in C (and C++). It’s a GObject-based library (light on the deps), which should be easy to use (see the example app).
Apart from the the basics to set/reset LEDs, there is
pi_glow_animate, which allows you determine the animations frame-by-frame. I’ll add some more stuff (such as gamma-correcting the LED-intensities), but it should already be useful.