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Download the 12 sprites and 31 scripts of "Perpetual Slinky" and open it in Scratch Project Notes
Watch the Perpetual Slinky that never gets tangled! Use the mouse to drag steps around to change the action.
This project is just a simple visual effect. I was thinking about parabolic curves and I decided to make a project to demonstrate how handy they are for making trajectories. So if you want an object to be thrown from one location to another, a parabola is a good curve to use.
Enjoy!
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cool!
Nice.
awesome sounds dude
How come I never noticed this?!?!?! It is so cool!! :D
Thanks! It's kind of buried in the back :)
(view all replies)This math stuff is way beyond me, but it's interesting that Scratch is capable of really making a completely wonderful and totally math-based project...I think I'll ask my teacher if we can use it on the SmartBoard in class...
Thanks! Yeah...this one is pretty heavy in the math area - high school level I think. I'm glad you enjoyed it though :)
I put the green one over all the others which were overlapped and it teleported!
this is awesome as
Ooh, I made it TANGLED! >:)
So did I. O_o
Great project! if you overlap them all it makes weird music...
cool!
cool
Kewl
*GASP* O____O it tangled...
Cool!
if you stack the steps, the slinky breaks, keeps "bong"ing, and freezes
Yes, it is a division by zero bug that I could not find a way to code around. Sorry :)
And why not cirles not connected togther?
This must be featured!
I know how to tangle it by moving the steps close to each other.
Yes...there is a glitch if the X values of the steps are the same.
coooool
3 letters:WOW!
nope 3 letters and a ecplmation point: WOW! :and a space and a colon and 3 a l e t t e r s LOL!
Scratch has detected that your Archery project is based on this one. Is it the math scripts that link the two? A number of projects by Scratchers have showed me that although I did really well in trig I didn't understand it at all -- not as a useful tool. But first I have to review Algebra II! Any student who wonders what math is "good for" ought to visit Scratch! I can hardly imagine a website and a group of people more interesting than what we find at Scratch.
I agree that the land of Scratch is populated by some of the most interesting people I can imagine :)
Those two are related? Oh. Well...I may have started out thinking I was going to make the arrow follow some sort of parabola but I ended up going an entirely different way.
The slinky is tangled!!!!!!
Oh, okay. Yeah, if the steps are placed at exactly the same X value, there's a division by zero error that kills the project. I tried to find a way to intercept that bug and work around it but didn't have much success. Sorry :)
(view all replies)Oops! How did that happen?
(view all replies)It is with regret that I am forced to announce another remix!! (link to project) It seems that Dr Cat has found a lot of wisdom in your work. And Dr Cat wants to pass it along. (As of this writing there are 31 remixes! Is that a record?) Thanks again for your project.
Endlessly amusing. BTW, I put the green one halfway on top of the yellow, and the red halfway on the blue and I'm still enjoying the combo as I write this! The steps bounce nicely when slinky lands on them. Very attractive project!
Thanks - I appreciate your comments! I am very fond of this project as it came out looking almost as good as I had hoped. I do wonder if there isn't a simpler less "mathy" approach that I could have taken.
(view all replies)i got it tangled
Me too!
how?
I have no idea how you made that!?!?!?!?!
It wasn't easy - It took a lot of math :) Thanks for giving it a go.
Wow!!!!!!!!!!!
Oh! Very cool! I never realized how useful this was until I took Algebra! :)
Algebra is powerful stuff :)
This is so awesome
Thanks! Glad you are having fun with it :)
cool I feel like Im really using a slinky!
Doody copied this project and didn't give credit!(link to project)
i didnt even knew what credit didnt mean then!
Wonderful.
I like it, though it isn't really realistic.
even then, if you move the steps, it always goes to where it used to be and then goes right to where it really is.
Of course, you are correct. The rings are not attached to each other and real slinkies don't bounce like that. I did the best I could to realize my vision. I had to make some compromises...as is always the case.
(view all replies)Cool! Confusing but brilliant
slinky!yay! i like slinkeys.
thank you for the help for the formula of finding a curve, i knew it was going to be you who is going to have the awnser
No problem! I hope it works for what you want it for. There is an formula for a circle that passes through 3 points...but I don't have it derived or written down. I would have to do some research. It does exist, though!
thats what i call good code!
This Is So Cool, And By The Way, Thanks For Comeing To LEGO Camp
Thanks! And I had a great time at the LEGO camp...it's always fun to work with enthusiastic people like you guys. One thing I forgot to tell you was to check out the Forums...they have something called Critique Groups which can help you join up with other people with similar interests so you can put helpful comments on each other's projects. Also, you can use the Show and Tell forum to tell other people what you have made, if you want.
(view all replies)wow
This is so cool! Your projects are so amazing!
oopsys I broke it.... I put everything in the same playce...
I froze it!!! muhaha. okay im sane now:)
it glitches when you drag a block the the slinky is on. Interesting project. My slinkies always get tangled. but nit this one.
You can also get it to freeze if you place two blocks exactly on top of each other (division by zero). I tried coding around it but was not successful - oh well!
(view all replies)really fun to watch
(link to project)
cool!
hehe quite fun
i am onlye 3$
awesome! http://scratch.mit.edu/users/nmebfromrs
kewl and it does just the right curve very planned
thats cool
fabulous
(the steps)
I tangled it (if you put them all on top of each other)
Yeah, that will lock it up. It causes division by zero. I tried a couple of fixes on it but so far I have not been successful.
awsome!
cool
(link to project)
(link to project) another 1 of my best projects
this is also 1 of my best projects.(link to project)
this is also one of my best projects. i hope u like it! (link to project)