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Contents
1
Introduction
2
Install
XL
O
G
O
2.1
XL
O
G
O
Configuration
2.1.1
Linux Environment
2.1.2
Windows Environment
2.2
XL
O
G
O
Updates
2.3
Uninstall
3
Interface features:
3.1
First run
3.2
The main window
3.3
The procedure editor
3.4
Quit
XL
O
G
O
4
Menu options:
4.1
“File” Menu
4.2
“Edit” Menu
4.3
“Tools” Menu
4.4
“Help” Menu
5
Conventions adopted by
XL
O
G
O
5.1
Commands and their interpretation
5.2
Procedures
5.3
Specific character \
5.4
Case-sensitivity
5.5
Operators and syntax
6
Basic primitives
6.1
New primitives
6.2
Drawing a regular polygon
6.2.1
Square
6.2.2
Equilatéral triangle
6.2.3
Hexagon
6.2.4
Drawing a regual polygon in general
6.3
Saving a procedure
6.4
Exercice ...
7
Using coordinates
7.1
Presentation
7.2
Exercice:
8
Variables
8.1
Examples
8.2
Drawing a rectangle with chosen dimension
8.3
Drawing at different scales
8.4
Exercice:
9
Recursion
9.1
With drawing area.
9.1.1
First example:
9.1.2
Second example:
9.2
With the text zone
9.2.1
First example:
9.2.2
Breakout test
9.3
A fractal example: Van Koch snowflake
9.4
Recursion with words
9.5
Calculate a factorial
9.6
π
Approximation
10
Create an animation
10.1
Calculator’s numbers
10.1.1
Filling a rectangular
10.1.2
The program
10.1.3
Creating an animation
10.2
Second animation: The growing man
11
Interact with the user
11.1
Question-answer
11.2
Programming a little game.
12
Topic: Two dice sum
12.1
Simulating rolling one die.
12.2
The program
13
Topic: Probabilistic approximation of
π
13.1
GCD (Greatest Common Divisor)
13.2
Euclidean algorithm
13.3
Calculate a GCD in
L
O
G
O
programming
13.4
Calculating
π
-approximation
13.5
More complex:
π
generating
π
.....
14
Topic: Menger’s sponge
14.1
Using recursion
14.2
Second approach: Drawing a Menger sponge, order 4
14.2.1
Sierpinski carpet
14.2.2
Drawing a Sierpinski carpet of order
p
14.2.3
All Different possible schemas for columns
14.2.4
The program
14.2.5
Menger’s sponge order 4
15
Topic: Lindenmayer system
15.1
Formal definition
15.2
Turtle interpretation
15.2.1
Usual Symbols
15.2.2
Van Snowflake
15.2.3
Quadratic Van Koch curve
15.2.4
Dragon curve
15.2.5
Hilbert 3D curve
A
List of primitives
A.1
Movement of the turtle; pen and color settings
A.1.1
A word on colors
A.1.2
Animation Mode
A.1.3
Writing in the text area with the primitive
print
or
write
A.2
Turtle and 3D
A.2.1
The perspective projection
A.2.2
Understanding orientation in a 3D World
A.2.3
Primitives available in 2D mode and 3D mode
A.2.4
3D Viewer
A.2.5
Drawing a cube
A.2.6
Lighting the scene
A.2.7
Fog effect
A.3
Arithmetical and logical operations
A.4
Operations on lists
A.5
Booleans
A.6
Testing an expression with the primitive
if
A.7
The workspace
A.7.1
Procedures
A.7.2
Concept of variables
A.7.3
Property Lists
A.8
Advanced fill function:
A.8.1
fill
and
fillzone
A.8.2
Primitive
fillpolygon
A.9
Break commands
A.10
Multiturtle Mode
A.11
Play music
A.11.1
Playing music using MIDI synthetizer
A.11.2
Playing MP3
A.12
Loops:
A.12.1
A loop with
repeat
A.12.2
A loop with
for
A.12.3
A loop with
while
A.12.4
A loop with
foreach
A.12.5
A loop with
forever
A.12.6
A loop with
repetewhile
A.12.7
A loop with
repeatuntil
A.13
Receiving input from the user
A.13.1
Interact with the keyboard
A.13.2
Some examples of usage:
A.13.3
Interact with the mouse
A.13.4
Some examples of usage:
A.13.5
Graphical components
A.14
Time and date
A.15
Using a network with XLogo
A.15.1
The network How to
A.15.2
Primitives for networking
B
Launching
XL
O
G
O
with command line
C
Executing Xlogo from the WEB
C.1
The problem
C.2
How to create the
jnlp
file
D
Solutions
D.1
Chapitre 5
D.2
Chapter 6
D.3
Chapter 7
D.3.1
the robot
D.3.2
The frog
D.4
Chapter 9:
E
FAQ - Tricks Things to know
E.1
Though I erase a procedure from the editor, it keeps on popping back!
E.2
I’m using the version in Esperanto but I can’t write with the special characters!
E.3
In the Sound tab from the Preferences dialogue box, no instrument can be found.
E.4
How to quickly retype a command used previously?
E.5
How can you help?
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