Fundamental Ideas of Programming

Working with jupyter notebooks

2 + 3    #this code cell

5

if []: is not present that means it is markdown cell

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Fundamental Ideas of Programming

2 + 3

5

import requests

def download(url, filename):
    with open(filename, "wb") as f:
        resp = requests.get(url)
        f.write(resp.content)

url = "https://raw.githubusercontent.com/fossunited/joy/main/joy.py"
download(url, "joy.py")

from joy import *

Just lego set there are some fundamental objects given to you. We will build new ideas from these peices

Line()

Circle()

Rectangle()

Line() + Rectangle()

Circle() + Rectangle()

shape = Circle() + Rectangle() + Line()

show(shape)

Circle(radius=100, stroke='red', stroke_width=5)

Circle(radius=100, stroke='none', fill='orange')

c1 = Circle(radius=100)
c2 = Circle(radius=50)
donut = c1 + c2
show(donut)

Problem

• can you make it filled donut?

c1 = Circle(radius=100, fill='orange')
c2 = Circle(radius=50, fill='white')
donut = c1 + c2
show(donut)

c1 = Circle(radius=100, fill='orange', stroke='none')
c2 = Circle(radius=50, fill='white', stroke='none')
donut = c1 + c2
show(donut)

def donut(r):
    donut_shape = Circle(radius=r) + Circle(radius=r/2)
    return donut_shape

donut(100)

donut(150)

shape = Circle(radius=100)
for i in range(1, 10):
    shape = shape + Circle(radius=100-i*10) # make note of indetation
show(shape)

def bulls_eye(radius, n):
    shape = Circle(radius=radius)
    for i in range(1, n):
        shape = shape + Circle(radius=radius-i*10)
    return shape

bulls_eye(100, 5)

bulls_eye(150, 15)

Transformations

line = Line()

line | Rotate(45)

Rectangle()

Rectangle() | Rotate(angle=45)

Rectangle() | Rotate(angle=45, anchor=Point(x=-100, y=0))

Circle() | Scale(0.5)

Circle()

Circle() | Scale(sx=0.5, sy=1)

def donut(radius):
    outer = Circle()
    inner = outer | Scale(0.7)
    return outer + inner

donut(100)

donut(50)

Rectangle()

Rectangle() | Translate(x=50, y=0)

Repeat

Line() | Repeat(n=18, transformation=Rotate(angle=18))

Line() | Repeat(n=36, transformation=Rotate(angle=10, anchor=Point(-150, 0)))

Rectangle(width=200, height=200) | Repeat(n=18, transformation=Rotate(angle=10))

def Square(size):
    return Rectangle(height=size, width=size)

Square(200) | Repeat(n=40, transformation=Scale(0.9))

Square(200) | Repeat(n=40, transformation=Scale(sx=0.9, sy=1))

Circle(center=Point(x=50, y=0)) | Repeat(n=18, transformation=Rotate(angle=20))

tx = Rotate(angle=5)| Scale(0.92)
Square(200) | Repeat(n=360//5, transformation=tx)

Circle(radius=20, center=Point(x=90, y=90))

Circle(radius=20, center=Point(x=90, y=90))| Repeat(n=360//20, transformation=Rotate(angle=20))

c = Circle(radius=20, center=Point(x=90, y=90))| Repeat(n=360//20, transformation=Rotate(angle=20))

c

c | Repeat(n=30, transformation=Scale(0.73))

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