How to make something spin 360degrees and move in a circle? | Forums

[rlmergeuser]

Right, hello guys.
I'm not very good with words so this may sound abit nutty..

I've got a little fairground cart which is constantly spinning, (360 degree) and I want to glue it to a pole above so it can go around in a circle like formation.

So I've got them both moving how I want, but when I glue to cart to the pole it only moves with the pole and it doesn't spin anymore... I've tried using point to points, hinges, everything..

Thanks

[Jarr3tt88]

Did you try gluing the entire thing and spin the glue pivot? Might be your best bet.

If you can take a pic I can understand better what you're trying to achieve.

Do you want the cart to spin 360, while the whole RIDE spins 360 also?

[Barrybarfly]

Glue the cart together and make it spin with an OPE. Then use a physics joint to rotate the cart around the central point of the ride and a physics joint to rotate the pole around the ride. That would create the effect you want, but there's probably an easier way to do it! lol

[rlmergeuser]

I'll take a pic.
I can't right now but I will tonight,

I'll try to glue it all and spin the pivot when I get home.
I didn't expect replies so fast

Thanks guys!

[Jarr3tt88]

I'll take a pic.
I can't right now but I will tonight,

I'll try to glue it all and spin the pivot when I get home.
I didn't expect replies so fast

Thanks guys!

Welcome If its individual carts spinning on a spinning ride, youll probably need to use physics joints like barry said above vs the OPE.

[sparkierjonesz]

well you could also do it with an ope pretty easy

1local looping cds to let it turn 360°

2global looping cds sine and 1 with an start offset of 1/4 of the total duration

[rlmergeuser]

Sorry i didnt post a pic lastnight, i didnt get a chance to go on the xbox.
Anyway here it is, sorry its not better..
Also i should probably just say that the 'Bar/Pole' whatever you wanna call it isnt going to stay like that, i'll try to make it look as authentic as i can

I tried to take a pic whilst it was moving aswell but as you can see it doesnt look that great, the carts are spinning in a different direction to the pole. (if that makes any difference i do not know!)

[rlmergeuser]

oops..
Heres the link to the photo

http://www.flickr.com/photos/theolli...in/photostream

Wow, i didn't actually realise how bad that photo was until i saw it on my laptop...
If you need a better one just say

[dasraizer]

the carts are spinning in a different direction to the pole. (if that makes any difference i do not know!)

i'd go with

well you could also do it with an ope pretty easy

1local looping cds to let it turn 360°

2global looping cds sine and 1 with an start offset of 1/4 of the total duration

the carts would be positioned with 2 CDS using Sin and Cos.
say your carts are 4 meters from the center pole, then set both CDS to Sin, Start to -4 and End to 4, duration to 240 ticks (4seconds)

setting the CDS to Sin its output over time will be
0 seconds output -4
1 second output 0
2 seconds output 4
3 seconds output 0
4 seconds output -4
and as Cos is just Sin but 90 degrees out of phase, you need 1 CDS to be offset by 1/4 the duration.
so
add the CDS outputs to the position of the center pole (using object position info), add Sin CDS to X and Cos CDS to Z, put these values into the carts OPE movement X/Z set on Global, now you're free to rotate the carts as you want.

if you have 4 carts, increase the CDS offsets (Sin/Cos) by 90 degrees for each one, setting the starting locationa 90 degrees apart in the circular path, so:
1st cart, Sin Offset=0, Cos Offset=60
2nd cart, Sin Offset=60, Cos Offset=120
3rd cart, Sin Offset=120, Cos Offset=180
4th cart, Sin Offset=180, Cos Offset=240 or 0

hope you understand what im trying to say!

[rlmergeuser]

Holy crap...
You lost me
I'll give it a go though, thank you so much for helping me!

However if I can't do it, it would be really appreciated if someone could explain it to me like I was a 7 year old, thanks