Jens's Recent Projects

illusion

Scanimation inspired by a clever picture book from my kids' bookshelf and by Scratch's new camera feature. use arrow keys or drag the mask to watch the illusion of a stop motion animation. Press space to switch to another one. (btw: this project was created using only Scratch)

Eliza

Tribute to Joe Weizenbaum. Excrutiatingly slow in Scratch, this must be how AI felt like in the Sixties, Eliza is the first Scratch project I can chat with about its own bugs: Eliza: Hi, what's up? Me: I want to test you Eliza: What would it mean to you if you got to test you? Me: you don't get it, it's about you Eliza: I'm actually quite boring, let's talk about you. Me: My name is Jens Eliza: Names, WHO needs names? Me: Oh, anyway I'm glad you're working Eliza: What makes you think I am workin? Me: your answers start making sense to me Eliza: Why are you concerned over my nwr tr aigsnet o? Me: Oh, now there is a glitch Eliza: Aren't we just a bit negative today? Me: I wish I could find that bug Eliza: I'm actually quite boring, let's talk about you. Me: please show me that bug Eliza: Why do you ask? Me: because that bug annoys me Eliza: Is that the real reason? Me: I'm also eager to share you Eliza: Why are you interested in wheter I am or not? Me: because I'm ontologically challenged ;-) Eliza: Is that the real reason? Me: let's call it a day, good bye Eliza: Hmmm.... Interesting, could you explain a little bit better? Me: bye Eliza: It's been a pleasure talking to you, bye.

coasting

this project tries to imitate iPhone-like side-scrolling. Press the green flag, drag the pane to the side and let go. Or press arrow keys. (did I really just mention "side-scrolling?!!")

momentum

press the green flag, drag the ball and let go. Just testing things :-)

Trivia

An example of a simple interactive quiz with multiple choice answers. in response to Memphisto's forum question: http://scratch.mit.edu/forums/viewtopic.php?id=13037

Fill

This project fills out various shapes using color sensing and the pen. Nothing spectactular, just a little experiment. Watch and enjoy! -Jens

Color Me!

trying to reproduce a simple coloring game in Scratch my kids discovered on a old touch-screen machine in a public waiting area. Press the green flag to start. Note: The colors are different online / offline because of a color scaling inconsistency in the java player (e.g. green's missing online)

Double Dragon

Yet another variant, I know it gets boring... (You can start to see the rainbow pattern at about the 8th iteration)

4 Dragons

demonstrates the space-filling ability of four dragon curves starting out in different directions. Iterates through orders 0-12.

Dragon

Just a quick check how recursion used to work in Scratch...

Recursion

a teaser, lol! You can download and play with the BYOB prototype here: http://scratch.mit.edu/forums/viewtopic.php?id=10887

Rainbow

-experimental- This project interprets a set of its own musical commands stored in a list to simulate a guitar singer. It's just a quick test of how you can implement your own programming language in Scratch. I'm calling this one Rainbow ;-) Its set of commands is as follows: | - measure mark ||: - start of repeat block :|| - end of repeat block x-chord - play chord n for one measure y - play note y (n-beats) - set duration of following notes rest - rest It works best when downloaded and played in edit mode. Can you transcribe your own songs using this format? Enjoy! -Jens

ScratchSort

This project is another attempt at finding a sorting algorithm that is fast enough to be useful in Scratch. I'm suggesting a variant of the Insertion Sort which makes use of the fact that the output list is already sorted as it is built, to find the insertable element's position much quicker. this project compares this "new" ScratchSort algorithm to my previous sorting champion "ThreadSort". Select the number of elements to sort and click on the star to start the race. Feel free to remix. Enjoy! -Jens

Sort

This project compares three sommon simple sorting algorithms (bubble, selection, insertion) against two others which I have optimized for Scratch (loops, threads). Select the number of elements to sort and click on the star to start the race. Feel free to remix. Enjoy! -Jens

Cluster

This project is an interactive cluster of sprites. Click on the green flag to start. The orange rectangle is the cluster's anchor, the other shapes are the anchor's parts. Get it? :) Here's what you can do with it: Drag the individual parts around. Drag the anchor to move the entire cluster. Press left/right arrow to turn the entire cluster. Press down/up arrow to change the entire cluster's size. Drag the anchor while pressing space to just move the anchor. Drag a part while pressing space to move the entire cluster. Press left/right arrow while dragging any shape to turn it individually. Press up/down arrow while dragging any shape to resize it individually. Enjoy! -Jens