1. Form Functions
- turtle.setup（width，height，startx，starty）
- Action: setting the size and position of the form
- width: the width of the window, if the value is an integer indicating a pixel value; if the value is a decimal, the ratio of the width of the window of the screen representation.
- height: the height of the window, if the value is an integer indicating a pixel value; if the value is a decimal, the ratio of the height of the window with the screen representation.
- startx: pixel from the left side and the left side of the screen window, if the value is None, the horizontal center of the screen window.
- starty: a pixel from the top window and the top of the screen, if the value is None, vertical center of the screen window.
2. Brush a state function
| pendown () |
Issued brush |
| penup () |
Lift the brush, and pendown () paired |
| pensize(width) |
Set the brush line thickness specified size |
| color() |
Set the color brush |
| begin_fill() |
Before filling graphics, call the method |
| end_fill() |
Filling end graphics |
| filling() |
Back-filled state, True filled, False unfilled |
| clear() |
Clear the current window, but does not change the current position of the brush |
| reset() |
Clear the current window, and reset the state to the default location value |
| screensize() |
Set the brush length and width |
| hideturtle() |
turtle shape hidden brush |
| showturtle() |
Display turtle shaped brush |
| isvisible() |
If the turtle is visible, True is returned |
3. Brush motion functions
| forward() |
Forward a specified distance along the current direction |
| backward() |
Back specified distance along a direction opposite to the current |
| right(angle) |
Rotate right angle angle |
| left(angle) |
Left angle of rotation angle |
| goto (x, y) |
Moved to the absolute coordinates (x, y) at |
| setx () |
The x-axis current to a specific location |
| sets () |
The current y axis to a specified position |
| setheading(angle) |
Set current orientation angle to an angle |
| home() |
Sets the current pen position as the origin toward the East. |
| circle(radius,e) |
Draw a circle radius r and angle specified or arc e |
| dot(r,color) |
Draw a dot designated color and colors of radius r |
| undo() |
Undo the last step action brush |
| speed() |
Brush set drawing speed parameter between 0-10 |
4. Case
- Case-1: draw the profile library using turtle color is red (red), the fill color to pink (Pink) heart-shaped pattern
from Turtle Import *
Color ( ' Red ' , ' Pink ' ) # Set brush color
begin_fill () # front fill pattern, the method is called
left (135) # rotation of 135 degrees to the left
FD (100) # control proceeds to the current brush forward direction 100
right (180) # rotated clockwise 180 degrees
circle (50, -180) # draw a specified radius of a circle or an arc angle of 50 and 180
left (90) # rotating 90 degrees left
circle (50, -180 ) # draw a specified radius of the circle or arc of an angle of 180 and 50
right (180) # rotated clockwise 180 degrees
FD (100) # control proceeds brush 100 to the current traveling direction
end_fill () # fill complete graphical
hideturtle () # hidden brush shape
done ()
- Case-2: Use turtle red five-pointed star drawn graphics library
from Turtle Import *
Setup ( 400, 400) # size of the form * 400 400
penUp () # picked his brushes
GOTO (-100,50) # move to the absolute coordinates (-100,50)
penDown () # falling brush, after moving brush shape drawn
Color ( ' Red ' )
begin_fill () # fill pattern
for I in Range (. 5 ):
forward ( 200) # advancing direction 200 along this
right (144) # rotates clockwise angle 144
end_fill () # fill graphics end
hideturtle ()
DONE ()
- Case-3: Use turtle draw a square helix library
from Turtle Import *
n- = 10
for I in Range (1,10 ):
for J in [90,180, -90 , 0]:
Seth (J) # change brushed direction
FD (n-) # current direction of forward travel of n + 5
+ =. 5 n-
hideturtle ()
DONE ()
- Case-4: Use turtle silhouette city library to draw simple graphics
from Turtle Import *
Setup ( 800,300) # set the size and position of the main form
penUp () # lifting the brush, then, without moving the brush to draw shapes
FD (-350 )
penDown () # falling brush, after moving the brush is drawn shape
DEF the DrawLine (size):
for angle in [0,90, -90, -90,90 ]:
left (angle) # leftward rotation angle angle
FD (size)
for I in [20,30,40,50, 40,30,20 ]:
the DrawLine (I)
hideturtle ()
DONE ()
- Case-5: Draw concentric circles using turtle graphics library
from Turtle Import * DEF DrawCctCircle (n-):
penUp () # lifting the brush, then, without moving the brush to draw shapes
GOTO (0, -n) # moves to the absolute coordinates (0, -n) at
penDown () # falling Brush after moving the brush to draw shapes
circle (n) # draw a circle n specified radius for I in Range (20,100,20 ):
DrawCctCircle (I)
hideturtle ()
DONE ()