Talk:Brain Gallery/@comment-24813804-20140414005007/@comment-24475768-20140419175538

This page explains what "pitch", "yaw" and "roll" are. For what you described, you normally don't need another axis (so yes, "speed factor" is a number)

It seems to me that you thought you needed a vector to choose the speed of rotation. This is only true in physics (it's the angular velocity). In Project Spark (and more generally, in mathematics), you have to use "vector rotate", which use an angle, and an axis. The axis is defined by a vector, but the "length" of the vector won't change the speed of rotation at all. I gave the kode with "vector rotate" earlier, in case you need an axis that isn't given by "yaw", "pitch" or "roll".