Spaces contain subsets of the broader turtleSpaces primitive (keyword) set dedicated to various types of creation. They also have restricted feature sets, to enable gradual exposure to everything turtleSpaces has to offer.
You can select a Space from the menu provided by clicking on the name of the current Space (eg omniSpace) in the top-left corner of the web IDE, or by clicking on the link in the following list:
In turtleSpaces, you can ‘stamp’ the current model, leaving a copy of it in the current position. This can be useful in some circumstances, to create artworks made out of more sophisticated models. In the case of this example, we’re going to use the default ‘myrtle’ turtle model to create a descending spiral of turtles.
If you change the colors in the default palette using the definecolor primitive, then those colors are also used to render the turtle model, and by extension the stamp. And so, if we ‘cycle’ the colors, shifting their RGB values from one palette slot to the next, we can create a rotating series of differently-colored turtles.
These routines use recursion (they repeatedly call themselves) to realise different Sierpinski algorithms. Logo’s recursion capabilities and relational turtle make it excellent for the task of rendering these algorithms! They’re also very pretty.
TO half_s :size :level
if :level = 0 [fd :size stop]
half_s :size :level - 1
lt 45 fd :size * sqrt 2 lt 45
half_s :size :level - 1
rt 90 fd :size rt 90
half_s :size :level - 1
lt 45 fd :size * sqrt 2 lt 45
half_s :size :level - 1
END
TO sierpinski :size :level
repeat 2 [
half_s :size :level
rt 90 fd :size rt 90
]
END
TO sierp
cs pu back 180 pd sierpinski 3 5
END
sierp
