Arrow at Center

A Quick Guide for Etoys on the OLPC XO

Guides about topics in EToys Help screens for the OLPC XO machine. NavBar    Keep Find Projects    Choose a Language Paint    Brushes    Color Palette    Bucket Tool    Straight Line Tool    Ellipse Tool    Rectangle Tool    Polygon Tool    Color Picker    Stamps Tool Halo    Make the Handles Show    Viewer of Script Tiles    Size Color Copy    Move and Pick Up    Rotate Handle    Trash    Arrow at Center    Center of Rotation    Menu Tools    Make a Script Tile    Collapse    Color Property Sheet Supplies    Object Catalog    Text    All Scripts    Joystick Control    Sound Recorder ObjectCat    Slider Bar    Grab Patch Tool    Lasso Tool    Digital Images    Maker Button Books    Top Border Icons    Expanded Controls    Working with Layers    Navigation Tiles ScriptTile    Forward by    Turn by    Bounce Motion    X and Y Tiles    Pen Use    Playfield Trail    Stamps    Heading    Scale Factor    Hide and Show    World Input    Sound Category    Exact Location    Random Numbers    Tests Category    Foward and Turn    Width Length Menu    Normal Ticking    Viewer Icons Set    Scriptor Icons Set    Button Fires a Script    Grab Me Reveal Me    Watchers    Playfield Graph Paper

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Squeak Etoys is a "media authoring tool"-- software that you can download to your computer
and then use to create your own media. You can write out your project and share it with others.
Etoys runs on any Mac or Windows machine, as well as on the OLPC XO machine.
It is free.    Find out about Etoys.

Text of this guide (for searching): Halo Tools: An Arrow at the Center of Rotation Shows the Direction of Motion. Right click on the turtle and drag the tiny arrow at the center of rotation to a new direction. If the arrow is hidden, move the blue Rotation handle to make it appear. This turtle's head points at the top of the screen but the direction arrow points to a heading of 45. Click the green clock to start the script. Try it. Change it. A drawing can be rotated to any heading with its Halo's Rotation handle and its green direction arrow can point in any direction too. Try it.