Basic Graphics #2 - Line

Using  -  The Python Computer Language
                Turtle Graphics Library

2.  LINE

FORWARD LINE

SAVE AS

 

>>> import turtle

>>>

>>> Pt = turtle.Turtle()

>>>

>>> Pt.forward(200)

>>>

>>> turtle.done()

>>> 

 

SAVE

 

Pt.forward(number of pixels)

    in the direction of the arrow head      ↑

 

This line is  1  pixel wide

The length of the line is from the start    

    pixel to the pixel at the front point of 

    the arrow head

 

 

BACKWARD LINE

SAVE AS

 

>>> import turtle

>>>

>>> Pt = turtle.Turtle()

>>>

>>> Pt.backward(200)

>>>

>>> turtle.done()

>>> 

 

SAVE

Pt.backward(number of pixels)                                 

    in the opposite direction of the

    arrow head                                               ↑

                                                                      ↓

This line is  1  pixel wide

The length of this line is from the start 

    pixel, to the pixel at the front point of

    the arrow head

 

 

 

FORWARD & BACKWARD LINE

 

SAVE AS

 

>>> import turtle

>>>

>>> Pt = turtle.Turtle()

>>>

>>> Pt.forward(200)

>>> Pt.backward(200)

>>>

>>> turtle.done()

>>> 

 

SAVE

Pt.forward(number of pixels)

    in the direction of the arrow head      ↑

 

Pt.backward(number of pixels)                                 

    in the opposite direction of the

    arrow head                                            ↑

                                                                      ↓

 

 

LINE WIDTH

SAVE AS

 

>>> import turtle

>>>

>>> Pt = turtle.Turtle()

>>>

>>> Pt.width(10)

>>> Pt.forward(200)

>>>

>>> turtle.done()

>>> 

SAVE

 

Pt.width(number of pixels)

 

This line is 10 pixels wide

(c) Katherine Stuart 2020

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