Happy FRIDAY!

Quick Announcements

• Project 1 Wordle is due on Monday next week at 10pm
  • Hopefully, people are making significant progress with the milestones
• Heads up: Our first Midterm exam is a week from now!
  • Study materials will come out on or before Monday next week
  • Sections next week will be for reviewing and studying
  • More info about the midterm on Monday
• Need accommodations? Book a spot with Testing center by emailing them, and be sure to copy me

Wednesdays left off

• Supposed live coding

Estimating Pi

• One of the ways that the value of \(\pi\) can be estimated is by looking at the number of random points that strike a circle vs a surrounding box
• Our task here is to both estimate they value of \(\pi\) using random numbers in this fashion, but to also visualize it!

A Solution

from pgl import GWindow, GRect, GOval
import random

WIDTH = 800
HEIGHT = 800

SIZE = 700
DART_SIZE = 10

gw = GWindow(WIDTH, HEIGHT)

background = GRect(
    WIDTH / 2 - SIZE / 2,
    HEIGHT / 2 - SIZE / 2,
    SIZE,
    SIZE
)
background.set_filled(True)
background.set_color('gray')
gw.add(background)

target = GOval(
    WIDTH / 2 - SIZE / 2,
    HEIGHT / 2 - SIZE / 2,
    SIZE,
    SIZE
)
target.set_filled(True)
target.set_color('darkgray')
gw.add(target)

attempts = 1000
successful_strikes = 0
for i in range(attempts):
    x = random.uniform(WIDTH / 2 - SIZE / 2, WIDTH / 2 + SIZE / 2)
    y = random.uniform(HEIGHT / 2 - SIZE / 2, HEIGHT / 2 + SIZE / 2)
    dart = GOval(
        x - DART_SIZE / 2,
        y - DART_SIZE / 2,
        DART_SIZE,
        DART_SIZE
    )
    dart.set_filled(True)
    distance_to_center = (
        (x - WIDTH / 2)**2 + (y - HEIGHT / 2)**2
    ) ** (1/2)
    if distance_to_center < SIZE / 2:
        dart.set_fill_color('red')
        successful_strikes += 1
    else:
        dart.set_fill_color('blue')
    gw.add(dart)

print(successful_strikes / attempts * 4 )

Group Problems

Problem 1: The Big Dipper

• You are provided with a file already with a night scene of the Big Dipper
• Your task is to draw in the lines connecting the proper stars
• No copy/pasting numbers here! Use methods to grab the needed coordinates from the star ovals

Problem 2: Label Bounder

• Write a program that:
  • Chooses a random English word and sets it to a GLabel
    • You can place the word starting on the left of the screen, roughly halfway down
  • Sets the font of that GLabel to a random size between 20 and 100pt, serif
  • Draws a rectangle immediately around the GLabel, such that its top is at the ascent distance and bottom at the descent distance.

Example Solution

from pgl import GWindow, GLabel, GRect
import random
from english import ENGLISH_WORDS

WIDTH = 500
HEIGHT = 200

gw = GWindow(WIDTH, HEIGHT)

word = random.choice(ENGLISH_WORDS).capitalize()
size = random.randint(20, 100)

label = GLabel(word, 0, HEIGHT / 2)
label.set_font(f"{size}pt serif")
gw.add(label)

box = GRect(
    label.get_x(),
    label.get_y() - label.get_ascent(),
    label.get_width(),
    label.get_ascent() + label.get_descent()
)
box.set_color('red')
gw.add(box)

Problem 3: What’s the Temp?

Example Solution

# Just continuing from the starting template...

temp = 10
for i in range(MARKER_START_Y, BASE - THERM_HEIGHT, -MARKER_STEP):
    line = GLine(
        WIDTH / 2 + THERM_WIDTH / 2,
        i,
        WIDTH / 2 - THERM_WIDTH / 4,
        i
    )
    line.set_line_width(2)
    gw.add(line)

    lab = GLabel(f"{temp}", WIDTH / 2 + THERM_WIDTH, i)
    gw.add(
        lab,
        WIDTH / 2 + THERM_WIDTH,
        i + lab.get_ascent() / 2
    )
    temp += 10

Live Coding

Recreating Connections

Code

• Sample solution to come!!!