How To Draw A Grid With Turtle

For simple drawing, python provides a built-in module named turtle. This behaves like a drawing board and y'all can utilize various drawing commands to depict over it. The basic commands control the movement of the drawing pen itself. Nosotros start with a very bones drawing programme and work our way through to describe a complete chess board using python turtle.

The following python plan draws a square shape using the bones turtle commands,

import turtle  board = turtle.Turtle()  board.frontward(100) # movement forward lath.right(90) # turn pen right ninety degrees  board.forward(100) board.right(90)  board.frontwards(100) board.correct(ninety)  board.forrard(100) board.right(90)  turtle.washed()

This tin can be easily encapsulated into a simple box office as shown below,

import turtle  def draw_box(t):     for i in range(0,4):         board.forward(100) # move forwards         lath.correct(90) # turn pen right 90 degrees  lath = turtle.Turtle()  draw_box(board)  turtle.washed()

Just what if we desire to describe different squares at different locations? The following python program shows how it can be washed using turtle commands. The draw_box() function is enhanced to draw the foursquare at a specific location. The following program draws a 3x3 grid of 30 pixel boxes.

import turtle  def draw_box(t,x,y,size):     t.penup() # no cartoon!     t.goto(x,y) # move the pen to a different position     t.pendown() # resume drawing     for i in range(0,iv):         board.frontward(size) # move forward         lath.right(xc) # turn pen right ninety degrees  board = turtle.Turtle()  start_x = fifty # starting ten position of the grid start_y = 50 # starting y position of the grid box_size = 30 # pixel size of each box in the grid for i in range(0,3): # 3x3 grid     for j in range(0,3):         draw_box(board,start_x + j*box_size, start_y + i*box_size, box_size)  turtle.done()

Let us now enhance the above python program to draw a chess board. This program illustrates the employ of colour in turtle drawing,

import turtle  def draw_box(t,x,y,size,fill_color):     t.penup() # no cartoon!     t.goto(x,y) # movement the pen to a different position     t.pendown() # resume drawing      t.fillcolor(fill_color)     t.begin_fill()  # Shape drawn after this will be filled with this colour!      for i in range(0,4):         lath.forward(size) # move forward         lath.right(xc) # turn pen right 90 degrees      t.end_fill() # Go ahead and make full the rectangle!   def draw_chess_board():     square_color = "black" # first chess board foursquare is black     start_x = 0 # starting x position of the chess lath     start_y = 0 # starting y position of the chess board     box_size = 30 # pixel size of each foursquare in the chess board     for i in range(0,eight): # 8x8 chess board         for j in range(0,viii):             draw_box(board,start_x+j*box_size,start_y+i*box_size,box_size,square_color)             square_color = 'blackness' if square_color == 'white' else 'white' # toggle later a cavalcade         square_color = 'black' if square_color == 'white' else 'white' # toggle after a row!   board = turtle.Turtle() draw_chess_board() turtle.washed()

Following is the chess lath output from the higher up python plan,

Chess Board Drawing Using Python Turtle Module