Question

Please help:

For this project, you will create a shape drawing program using Turtle graphics. Your program will begin by asking the user how many points they would like to enter (# of vertices for the shape). Next, you will use a loop to input each X and Y coordinate and store these coordinates in lists. After inputting all of the coordinates, create a second loop that will draw and fill the shape using the coordinates that were entered. All of this will be inside a loop that will ask the user if they want to draw another shape. If the user enters yes, clear the screen and repeat the process. If the user enters no, the program will exit. The minimum requirements are listed below:

For all of your input for this program, you should use either the turtle.numinput or turtle.textinput function. You can find more information on these functions here: https://docs.python.org/3.1/library/turtle.html#turtle.numinput (Links to an external site.)

Create InputDimensions function (no parameters, x and y coordinate lists are the return values) - This function will ask the user how many coordinates they want to enter (validate the input) and then use a loop to input each of the X and Y coordinates. Store each of the X and Y coordinates in your lists. You can use the turtle.numinput() function to input each of these values. Make sure your prompt includes the loop index (coordinate #) so the user knows which coordinate they are currently inputting -- something like "Input the X value for coordinate #1".

Create DrawShape function (x and y coordinates are the function parameters, no return value) - This function will use the begin_fill and end_fill functions along with a loop to go to each of the coordinates in the X and Y coordinate lists.

Your main function will contain the loop that asks the user if they want to draw another shape. For extra credit, you can include additional options like inputting the fill color, pen size, background color, etc. from the user. You can use the turtle.textinput function to input this information.

Answer 1

Here is the completed code for this problem. Comments are included, go through it, learn how things work and let me know if you have any doubts or if you need anything to change. If you are satisfied with the solution, please rate the answer. Thanks

Note: Please maintain proper code spacing (indentation), just copy the code part and paste it in your compiler/IDE directly, no modifications required.

#code

import turtle

''' method to input number of coordinates and coordinates'''
def InputDimensions():
    #reading # of vertices
    n=turtle.numinput('Input','Enter the number of vertices for the shape: ')
    n=int(n) #n is float now, converting to int
    points=[] #empty list
    #looping for n times
    for i in range(n):
        #reading x value for current vertex
        x=turtle.numinput('Input','Enter the x coordinate for vertex #{}'.format(i))
        # reading y value for current vertex
        y = turtle.numinput('Input', 'Enter the y coordinate for vertex #{}'.format(i))
        #appending x,y as a tuple to points list
        points.append((x,y))
    #returning list
    return points

''' method to draw the shape, given list of coordinates'''
def DrawShape(coordinates):
    #if coordinates list is empty, returning
    if len(coordinates)==0:
        return
    #pen up
    turtle.up()
    #positioning turtle at first coordinate ((x,y) tuple)
    turtle.goto(coordinates[0])
    #pen down
    turtle.down()
    #start to fill
    turtle.begin_fill()
    #looping through remaining points
    for point in coordinates[1:]:
        #moving turtle to current point
        turtle.goto(point)
    #end of fill
    turtle.end_fill()


def main():
    ch='Y'
    #looping as long as ch is not None and is 'Y' or 'y'
    while ch!=None and ch.upper()=='Y':
        #clearing screen
        turtle.Screen().clear()
        #reading fill color and bg color
        fillcolor=turtle.textinput('Input','Enter fill color:')
        turtle.fillcolor(fillcolor)
        bgcolor = turtle.textinput('Input', 'Enter background color:')
        turtle.Screen().bgcolor(bgcolor)
        #reading points
        points=InputDimensions()
        #drawing shape
        DrawShape(points)
        #asking if user likes to draw anather shape
        ch=turtle.textinput('Input','Do you want to draw another shape? Y/N')
    #finishing off
    turtle.done()

#calling main()
main()

#OUTPUT (partial)

Python Turtle Graphics Input Enter fill color: red Cancel OK X

Python Turtle Graphics X Input Enter background color: yellow Cancel ок

Python Turtle Graphics Input Enter the number of vertices for the shape: Ок Cancel

Python Turtle Graphics Input Enter the x coordinate for vertex #0 Cancel Ок X

X Python Turtle Graphics