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|'''Hints and tips''': Single clicking (no drag) with the circle, triangle or box tool, will add a default sized shape. Once you have used a shape tool, it remembers the last shape you made with it, a single click will add a clone of that last shape.
|'''Hints and tips''': Single clicking (no drag) with the circle, triangle or box tool, will add a default sized shape. Once you have used a shape tool, it remembers the last shape you made with it, a single click will add a clone of that last shape.
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== Did you know? ==
There is a Plugin for [[Activities/TurtleArt|Turtle Blocks]] that lets you create projects for the Physics Activity:
[[File:Physics pallette.jpg]]
Use these blocks to create objects that are added to the bodylist and jointlist of a Box2d database used by the Physics Activity. Objects are positioned by the turtle x,y and colored based on the current pen attributes. From left to right:
* density: set the object density (0 is light; 1 is heavy)
* friction: set the object friction (0 is slippery; 1 is sticky)
* bounciness: set the object restitution (0 is rigid; 1 is bouncy)
* start polygon: use the current turtle x,y position to specify the first vertex of a polygon
* add point: use the current turtle x,y position to add a vertex to a polygon
* end polygon: use the current turtle x,y position to specify the last vertex of a polygon
* end filled polygon: use the current turtle x,y position to specify the last vertex of a ''filled'' polygon
: '''Note:''' The polygon must be 'normal', e.g., no crossed lines; no holes. Since Box2d does not support concave polygons, all polygons are converted to triangles (triangulation). (In Turtle Blocks, these triangles are shown by slight variations in color.)
* triangle: add a triangle object at the current turtle x,y position
* circle: add a circle object at the current turtle x,y position
* rectangle: add a rectangle object at the current turtle x,y position
* gear: add a gear object at the current turtle x,y position with the number of teeth as the argument
* gear radius: returns the radius of a gear with the number of teeth as the argument (useful for positioning gears)
* motor: add a motor at the current turtle x,y position (attached to the object at this position)
* pin: add a pin at the current turtle x,y position (attached to the object at this position) to prevent movement
* pen: add a pen at the current turtle x,y position (attached to the object at this position) to trace motion
* joint: add a joint between the object at the current turtle x,y position and the object at x, y
* save as Physics project: save the current bodylist and jointlist as a Physics project in the Journal
'''Note:''' The current model is cleared whenever the Erase button is pressed or a Clean block is run.
===== Example =====
A simple gear and motor generated in Turtle Art:
[[File:TAGearTA.png|300px]]
[[File:TAGear.png|300px]]
'''For Turtle Blocks versions 107 - 183'''
[[File:TAgear.ta]] [[File:Gear.physics]]
'''For Turtle Blocks verisons 184 - '''
[http://people.sugarlabs.org/walter/physics-plugin.tar.gz]
'''A chain'''
[[File:Chain.png|300px]]
Turtle Blocks project file: [http://people.sugarlabs.org/walter/chain.tb]
===Downloads===
[[File:Physics-plugin.tar.gz]] Physics plugin
[http://github.com/walterbender/physics-plugin git repository]
= Development =
= Development =