lucio
Program total score is: 181
Hessa mohammed - 3 months ago
Hessa mohammed - 3 months ago
Basic Commands
back X , bk X
The turtle backs x points
Example:
back 50
right X , rt X
Rotate the turtle right x degrees
Example:
right 90
Explained in lesson:
clearscreen , cs
Will clear the screen and return the turtle home
Example:
cs
Explained in lesson:
changeshape X or STR , csh X or STR
Will change the turtle to another shape accordin to the following 0 = "turtle", 1 = "cat", 2 = "fish", 3 = "dog", 4 = "horse", 5 = "tiger", 6 = "crab", 7 = "snail"
Example:
csh 1 or csh "dog
Explained in lesson:
Controlling the Pen
penup , pu
Turtle stops leaving a trail
Example:
penup
Explained in lesson:
pendown , pd
The turtle will leave a trail
Example:
pendown
Explained in lesson:
wait X
Will cause the turtle to wait X ( 60ths of seconds ) time before executing the command
Example:
repeat 4 [ wait 10 fd 50]
Explained in lesson:
hideturtle , ht
Hide the turtle
Example:
hideturtle
Explained in lesson:
showturtle , st
Show the turtle
Example:
ht wait st
Explained in lesson:
home
Moves the turtle to center, pointing upwards
Example:
home
setx NUM_x
Move turtle to the specified X location
Example:
setx 100
Explained in lesson:
sety NUM_y
Move turtle to the specified Y location
Example:
sety 200
Explained in lesson:
setxy NUM_X NUM_Y
Move turtle to the specified location
Example:
setxy 100 100
Explained in lesson:
setheading , seth
Rotate the turtle to the specified heading
Example:
sh 145
Explained in lesson:
arc ANGLE RADIUS
Will create an arc distance RADIUS covering ANGLE angle
Example:
ARC 360 5
Explained in lesson:
ellipse WIDTH HEIGHT
Will craete an ellipse width Width and height Height
Example:
ellipse 80 90
pos
Outputs the current turtle position as [ x y ], x or y respectively
Example:
pos
Explained in lesson:
xcor
Outputs the current turtle position as [ x y ], x or y respectively
Example:
xcor
Explained in lesson:
ycor
Outputs the current turtle position as [ x y ], x or y respectively
Example:
ycor
Explained in lesson:
heading
Outputs the current turtle heading
Example:
heading
towards
Outputs the heading towards the specified [ x y ] coordinates
Example:
towards
Explained in lesson:
Loops and procedure
repeat X [ statements ... ]
Repeat statements X times
Example:
repeat 4 [ fd 50 rt 90]
Explained in lesson:
repcount
Outputs the current iteration number of the current repeat or forever
Example:
repeat 4 [ repcount ]
for controllist [ statements ...]
Typical for loop. The controllist specifies three or four members: the local varname, start value, limit value, and optional step size
Example:
for [i 1 10 1] [print :i]
Explained in lesson:
to PROCNAME inputs ... statements ... end
Define a new named procedure with optional inputs
Example:
to TURTLE repeat 4 [ fd 50 rt 90] end
Explained in lesson:
make varname expr
Update a variable or define a new global variable. The variable name must be quoted
Example:
make "foo 5
Explained in lesson:
: VARNAME
access the content of VARNAME
Example:
make "foo 5 repeate :foo [fd 50 rt 360 / :foo]
Lists
list thing1 thing2 ...
Create a new list from the inputs
Example:
make "mylist (list "turtle "academy)
Explained in lesson:
first listname
Outputs the first item from the list
Example:
print first :mylist
Explained in lesson:
butfirst listname
Outputs all the items of listname except for the first item
Example:
print butfirst :mylist
Explained in lesson:
last listname
Outputs the last item from the list
Example:
print last :mylist
Explained in lesson:
butlast listname
Outputs all the items of listname except for the last item
Example:
print butlast :mylist
Explained in lesson:
item index listname
Outputs the indexlist item of the list or array
Example:
print item 1 :mylist
Explained in lesson:
pick index listname
Outputs one item from a list, at random
Example:
print pick :mylist
Explained in lesson:
Colors
setcolor X
| 0: black | 1: blue | 2: lime |
| 3: cyan | 4: red | 5: magenta |
| 6: yellow | 7: white | 8: brown |
| 9: tan | 10: green | 11: aquamarine |
| 12: salmon | 13: purple | 14: orange |
| 15: gray |
Example:
setcolor 1
Explained in lesson:
setcolor [r,g,b]
Will set the turtle color accroding to the amount of red , green and blue
Example:
setcolor [50 100 50]
fill
Does a paint bucket flood fill at the turtle\'s position
Example:
cs repeear 4 [ fd 50 rt 90 ] pu setxy 50 50 pd fill
Explained in lesson:
filled fillcolor [ statements ... ]
Execute statements without drawing but keeping track of turtle movements. When complete, fill the region traced by the turtle with fillcolor and outline the region with the current pen style
Example:
filled "blue [repeat 4 [fd 100 rt 90]]
Explained in lesson:
Math
minus X Y
return the distance between x and y x-y
Example:
print minus 8 2
random X
Will choose a random number between 0 - (X-1)'
Example:
cs print sum random 10 3
Explained in lesson:
modulo expr expr
Outputs the remainder (modulus). For remainder and % the result has the same sign as the first input; for modulo the result has the same sign as a the second input.
Example:
cs print modulo 10 3
Control Structure
if expr [statement]
Execute statment if expressoin is true
Example:
if 2>1 [print "hello]
Explained in lesson:
ifelse expr [statementTrue] [statementFalse]
Execute StatementTrue if tru else execute statementFalse
Example:
ifelse 0>1 [print "true] [print "false]
test expr
Test the specified expression save the result in the local scope for the subsequent use by iftrue iffalse
Example:
test 3>4 iftrue [print "true] iffalse [print "false]
iftrue [statements]
Example:
test 3>4 iftrue [print "true] iffalse [print "false]
iffalse [statements]]
Example:
test 3>4 iftrue [print "true] iffalse [print "false]
Scott Hogsett - 2 months ago