Python-turtle Library Knowledge Summary (Python drawing tool)

　　Turtle: Turtle (Turtle pool)

The Turtle Library is a very popular function library for drawing images in the Python language .

You need to import the library before using: Import Turtle

? Turtle.setup (Width,height,startx,starty)
-setup () setting the position and size of the form
The coordinates of the starting point relative to the desktop and the height of the width of the window, if the starting point of the window is not written, the default is the right center of the desktop
The coordinate origin of the form defaults to the center of the window
? Absolute coordinates
0turtle.goto (100,100): refers to the coordinates given in parentheses from the current point
The turtle coordinates, the current point as a coordinate, with the front direction, the back direction, the left direction, the right side
0TURTLE.FD (d): means to run along the turtle's front direction
0TURTLE.BK (d): means running in the opposite direction of the turtle
0turtle.circle (R,angle): Refers to a circular movement along the left side of the turtle
? Absolute Angle
0turtle.seth (angle): Only changes the direction of the Turtle (angle counterclockwise), but does not travel, angle for absolute degrees
? Turtle Angle
0turtle.left (angle)
0turtle.right (angle)

First, RGB color system

　RGB color values range from 0-255 integers or 0-1 decimals

　　

　　

second, switch RGB color mode　

　　　Turtle.colormode (Mode)

• • 1.0:rgb decimal Mode
  • 255:rgb integer pattern

Three, brush control function

1, Turtle.penup () alias Turtle.pu ()
Brush up, leave no trace
2, Turtle.pendown () alias TURTLE.PD ()
Brushes Fall, leaving traces
3, Turtle.pensize (width) alias turtle.width (width)
Brush width
4, Turtle.pencolor (color)
Color is a string of colors or an RGB value
Eg:turtle.pencolor ("Purple") color string
Turtle.pencolor (0.63,0.13,0.94) RGB decimal value
Turtle.pencolor ((0.63,0.13,0.94)) RGB tuple value

Iv. Motion Control functions　　

1. Turtle.forword (d) alias Turtle.fd (d)
Marching Forward
D: Travel distance, can be negative
2, Turtle.circle (R,extent=none)
Draw a radian of extent angle according to radius r
R: The location of the default center point on the left R distance of the turtle

Five, direction control function

1, turtle.setheading (angle) alias Turtle.seth (angle)
Changing direction of travel
2, Angle: Change the direction of the angle (absolute coordinates, absolute angle)
3, Turtle.left (angle)
4, turtle.right (angle)
Angle: Angle of rotation in the current direction (turtle angle)

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Python-turtle Library Knowledge Summary (Python drawing tool)