Matching particle rotation to emitter face rotation - possible?

I have set up a simple blend file to illustrate my question (attached).

I have created a particle system. The particles (blue) are appearing on the emitter (green). The emitter has two faces (which are separated, but still one object) and I have set the system to emit one particle on each face.

I would like the particles to rotate in Z axis to match the rotation of the faces, but instead they are matching the rotation of the object.

Is there a way to link the rotation of each particle to the rotation of the face which is emitting it?

Thanks for any clues.

Attachments


PARTICLE PUZZLE.blend (686 KB)

Parent your object to the emitter.

stilltrying,

Thanks for responding. I did that (parent Dupli Object to Emitter), but it had no effect. The particle continues to mimic the rotation / orientation of the Dupli Object and ignores the rotation of the face which is emitting it.

I can’t test in Blender at the moment, but you should be able to do this if you UV-unwrap your emitter mesh and set initial rotation of the hair particles to Normal/Tangent. You may have to rotate the parent particle mesh in edit mode to get the origins placed correctly.

Thanks very much CD38,

UV-unwrap + Normal/tangent rotation worked. I can now rotate the face and the particle rotates with it. Just one more glitch: in order to get the particles to stand upright, I had to lay the Dupli Object on its side - so they disagree by 90 degrees on the (global) Y axis and I can’t see why that is or how to correct it.

Attachments


they disagree by 90 degrees on the (global) Y axis and I can’t see why that is or how to correct it.

Yeah, for some reason Blender hair particles use global X as “up” if you have the Rotation box checked. Unfortunately you always have to correct by rotating the dupli object’s mesh about the Y axis; I’ve never found a way around it.

Thanks again CD. I can live with it, for now.