I started playing with particle sources for the first time tomorrow. I have an object which is actually a collection of a bunch of objects all parented to the main object. Among those parented were the three particle fountains.
Originally, the object was oriented so that the particle fountains naturally needed the “Force” to be in the Y-direction, so I set the particles up that way. I had the particles working the way I wanted; then I rotated the object. All the objects which had the main object as their parent rotated along with the main object, as expected. This included the particles sources. However, the direction of the particle force did not rotate, but still was directly in the Y-direction. In other words, the particle fountains were now coming off at an odd angle.
These rotations were all done in Object mode, not Edit mode, so it was a transformation of the whole object. Textures also rotated along with the object, as expected.
Is there a way to get particle Force directions to rotate along with parent objects? I searched the web a bit, but could not find an answer.