Strange Behavior from Particles

[Matt Sugden]

Can anyone shed some light on this....

 

I have arrows being emitted from a particle emitter, and they are using a 'speed by icon' modifier, which is constrained to a path. As you can see they are heading down the direction of the path, but the problem I am encountering is that when they generate, usually for only a single frame, the arrows point the wrong way. I have 'steer towards trajectory ticked', so I'm just a bit stumped as to why this is happening. Can anyone suggest why this could be?

 

I've tried, re-aligning the arrow's pivot point, makes no difference. It's really bugging me.

[cg_Butler]

What happens if you slice the line so it's not directly starting where the emitter is?

[Matt Sugden]

Thanks for the reply, but it doesn't help, slicing the spline just seems to delete the line. But I've tried all sorts of combinations of moving the emitter.

[cg_Butler]

Sorry. Bad terminology on my part. Adding a slice modifier isn't what I meant.

 

You could try making that first vertex a corner type I it's not already.

[Peter M. Gruhn]

I don't know if this is legit, but it seems to be working. Drop a plain Speed modifier before the Speed by Icon. Default set to Along Icon Arrow.

 

Now I can't get it to orient right w/o a Rotation set to Speed Space Follow, so I may be doing something different from you. Still, give it a try. "A correct solution is one that works."

[Matt Sugden]

I don't know if this is legit, but it seems to be working. Drop a plain Speed modifier before the Speed by Icon. Default set to Along Icon Arrow.

 

Now I can't get it to orient right w/o a Rotation set to Speed Space Follow, so I may be doing something different from you. Still, give it a try. "A correct solution is one that works."

 

This seems to work.... how bizarre. Thanks