PYGLET – Drawing Line

In this article, we will see how we can draw line on window in PYGLET module in python. Pyglet is easy to use but powerful library for developing visually rich GUI applications like games, multimedia etc. A window is a “heavyweight” object occupying operating system resources. Windows may appear as floating regions or can be set to fill an entire screen (fullscreen). Spectral line shape describes the form of a feature, observed in spectroscopy, corresponding to an energy change in an atom, molecule or ion. Ideal line shapes include Lorentzian, Gaussian and Voigt functions, whose parameters are the line position, maximum height and half-width. Line is drawn with the help of shapes module in pyglet.

We can create a window with the help of command given below 

# creating a window
window = pyglet.window.Window(width, height, title)

In order to create window we use Line method with pyglet.shapes
Syntax : shapes.Line(co_x1, co_y1, co_x2, co_y2, width, color = (50, 225, 30), batch=batch)
Argument : It takes starting and end position in form of pair of two integers, width of line, color of line and last is batch object
Return : It returns Line object 

Below is the implementation  

Python3

# importing pyglet module
import pyglet

# importing shapes from the pyglet
from pyglet import shapes

# width of window
width = 500

# height of window
height = 500

# caption i.e title of the window
title = "Geeksforgeeks"

# creating a window
window = pyglet.window.Window(width, height, title)

# creating a batch object
batch = pyglet.graphics.Batch()


# properties of line
# first co-ordinates of line
co_x1 = 150
co_y1 = 150

# second co-ordinates of line
co_x2 = 350
co_y2 = 350

# width of line
width = 10

# color = green
color = (50, 225, 30)

# creating a line
line1 = shapes.Line(co_x1, co_y1, co_x2, co_y2, width, color = (50, 225, 30), batch = batch)

# changing opacity of the line1
# opacity is visibility (0 = invisible, 255 means visible)
line1.opacity = 250


# creating another line with properties
# x1, y1 = 50, 250
# x2, y2 = 400, 250
# color = red
line2 = shapes.Line(50, 250, 400, 250, 30, color = (250, 30, 30), batch = batch)

# changing opacity of the line2
# opacity is visibility (0 = invisible, 255 means visible)
line2.opacity = 100


# window draw event
@window.event
def on_draw():

    # clear the window
    window.clear()

    # draw the batch
    batch.draw()

# run the pyglet application
pyglet.app.run()

Output :