Activities/Turtle Art: Difference between revisions

These blocks are used to control the movements of the turtle.

* forward: move turtle forward

* back: move turtle backward

* left: rotate turtle counterclockwise

* right: rotate turtle clockwise

* set xy: set turtle x,y position (0,0) is the center of the screen

* xcor: holds current x-coordinate value of the turtle (can be used in place of a number block)  

* ycor: holds current y-coordinate value of the turtle (can be used in place of a number block)

====Pen Palette====

* fill screen: fill the screen with a color/shade and reposition the turtle in the center of the screen

* pen size: width of the line drawn by the turtle (can be used in place of a number block)

* start fill: starts a filled polygon (straight sides, not arcs)

* end fill: ends a fill polygon (straight sides, not arcs)

These blocks can be used with the set-pen-color block in place of a number block.

====Numbers Palette====

These blocks are for defining variables and subroutines.

* store in box 1: store a number, string, or media object in box 1 (Only available with Turtle Blocks)

* store in box 2: store a number, string, or media object in box 2 (Only available with Turtle Blocks)

* box: current value of named box (can be used in place of a number block)

* store in: store a number, string, or media object in a named box

====Media Palette====

These are a collection of blocks used for displaying media objects, such as images from the Journal.

====Sensors Palette====

* read pixel: push the RGB value of the pixel under the turtle onto the FILO (blue is first, red is last)

* turtle sees: the "palette color" of the pixel under the turtle

* sound: raw data from microphone ranging -32000 to 32000

The OLPC XO can measure external inputs with its microphone jack:

* push: push value onto FILO (first-in last-out) heap

* show heap: show FILO in status block

* empty heap: empty the FILO

* Python: a [[Activities/TurtleArt-0.88#Python_function_block|programmable block]] (can be used in place of a number block)

:: add your own math equation in the block, e.g., sin(x); This block is expandable to support up to three variables, e.g. f(x,y,z)

* Import Python: [[Activities/TurtleArt-0.88#Python_code_block|import Python code]] from the Sugar Journal (a more general-purpose programmable block). This block accepts a single variable x, as an input or up to 3 variables as an array x[0], x[1] and x[2]

* Cartesian: display Cartesian coordinate grid overlay

* polar: display polar coordinate grid overlay

* turtle: specify which turtle is active

* turtle shell: import a image from the Journal to use as the turtle's 'shell', i.e., replace the turtle with a sprite.

These blocks are used to make multimedia presentations only available in Turtle Blocks.

* hide blocks: hides all blocks and palettes (useful for decluttering the screen during presentations) (also available in Turtle Art)

* show blocks: shows blocks and palettes (useful for resuming programming after a presentation)

* full screen: goes into full-screen mode (hides Sugar toolbars)

* list slide: used for bulleted lists; This block is expandable, allowing you to add as many bullets as you need

* picture slides: used for picture slides (1×1, 2×2, 1×2, and 2×1)

::Note: The slide blocks expand into stacks that can be edited for customized presentations.