The formula for the perimeter of a circle is P = 2 π r. The formula for the area of a circle is A = π r². Therefore, P² / A equals 4 π, and a quarter of that equals π. According to the isoperimetric inequality, among all closed curves in the plane of fixed perimeter, a circle maximizes the area of its enclosed region. Therefore, the closer a shape is to a circle, the closer its (1/4) P² / A value is to π. This method is used to measure the roundness of the shape you've drawn.

StatusReleased
PlatformsHTML5
Rating
Rated 5.0 out of 5 stars
(5 total ratings)
Authormatrix67
GenreEducational
TagsDrawing
Average sessionA few seconds
LanguagesEnglish
InputsMouse, Touchscreen

Comments

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My Best:3.169583-A+

PI<3.15-S+ <3.16-S <3.17-A+ <3.18-A <3.2-B+ <3.3-B <3.4-C <4-D >4-D-

123

3.20

with samsung tablet and spen :3

GPT is really changing everything... While others already posted a perfect score using a program, I also used GPT-4 to achieve that in one shot. Just copy paste the code and it just works. What's really impressive is, I also cloned this game in 3 minutes with GPT's help. The cloned page is here: https://yage.ai/circle.html . And the specific prompt I used can be found in this link: https://chat.openai.com/share/96575893-4961-4f1b-8bdd-5c8715ae768e

This was the best I could do free-hand with a regular ol' wired PC mouse.  I'm satisfied:

(+1)

3.196583

(1 edit) (+4)

Cheat, but still by hand

(+3)

cheat

(-1)

wow!how?

so amazing

import math
import time
from pynput.mouse import Controller, Button
circle_radius = 350
circle_center_x = 1200
circle_center_y = 500
duration = 5  
mouse = Controller()
mouse.position = (1550, 500)
mouse.press(Button.left)
start_time = time.time()
elapsed_time = 0
while elapsed_time < duration:
    current_angle = (elapsed_time / duration) * 2 * math.pi
    x = circle_center_x + int(circle_radius * math.cos(current_angle))
    y = circle_center_y + int(circle_radius * math.sin(current_angle))
    mouse.position = (x, y)
    elapsed_time = time.time() - start_time
mouse.release(Button.left)
mouse.position = (circle_center_x, circle_center_y)

import time
import pyautogui
import math
from decimal import Decimal
# 获取窗口左上角坐标和宽度、高度
window_name = "Pi Day Challenge by matrix67"
window_info = pyautogui.getWindowsWithTitle(window_name)[0]
window_left = window_info.left
window_top = window_info.top
window_width = window_info.width
window_height = window_info.height
# 点击窗口标题栏,将焦点切换到指定窗口
window_info.activate()
# 计算圆的半径
radius = Decimal(664)
# 计算圆心坐标
center_x = window_left + window_width // 2
center_y = window_top + window_height // 2+Decimal(90)
# 点击窗口标题栏,将焦点切换到指定窗口
pyautogui.click(window_info.left + 50, window_info.top + 10)
# 计算圆上某一点的坐标
angle = 0  # 将角度设置为圆的某个角度,这里设为 45 度
a = center_x + radius * Decimal(math.cos(angle))
b = center_y + radius * Decimal(math.sin(angle))
pyautogui.moveTo(a, b, duration=0)
# 按下鼠标左键
pyautogui.mouseDown(button='left')
time.sleep(0.5)
# 绘制圆形
steps = 100
for step in range(steps+1):
    angle = (Decimal(2) * Decimal(math.pi) / Decimal(steps)) * Decimal(step)
    x = center_x + radius * Decimal(math.cos(angle))
    y = center_y + radius * Decimal(math.sin(angle))
    pyautogui.moveTo(x, y, duration=0)
# 抬起鼠标左键
pyautogui.mouseUp(button='left')
# 恢复鼠标位置
pyautogui.moveTo(center_x, center_y, duration=0)

import time
import pyautogui
import math
# 获取窗口左上角坐标和宽度、高度
window_name = "Pi Day Challenge by matrix67"
window_info = pyautogui.getWindowsWithTitle(window_name)[0]
window_left = window_info.left
window_top = window_info.top
window_width = window_info.width
window_height = window_info.height
# 点击窗口标题栏,将焦点切换到指定窗口
window_info.activate()
# 计算圆的半径
radius = 664.95
# 计算圆心坐标
center_x = window_left + window_width // 2
center_y = window_top + window_height // 2+90
# 点击窗口标题栏,将焦点切换到指定窗口
pyautogui.click(window_info.left + 50, window_info.top + 10)
# 计算圆上某一点的坐标
angle = 0  # 将角度设置为圆的某个角度,这里设为 45 度
a = int(center_x + radius * math.cos(angle))
b = int(center_y + radius * math.sin(angle))
pyautogui.moveTo(a, b, duration=0)
# 按下鼠标左键
pyautogui.mouseDown(button='left')
time.sleep(0.5)
# 绘制圆形
steps = 100
for step in range(steps+1):
    angle = (2 * math.pi / steps) * step
    x = int(center_x + radius * math.cos(angle))
    y = int(center_y + radius * math.sin(angle))
    pyautogui.moveTo(x, y, duration=0)
# 抬起鼠标左键
pyautogui.mouseUp(button='left')
# 恢复鼠标位置
pyautogui.moveTo(center_x, center_y, duration=0)
(+1)

Wow That's wild, game destroyed

I wish I was a circle.

Managed to snag an S+ score, but let’s be real, it was all thanks to some sneaky pyautogui wizardry. I’m basically the cheater’s champion of the pi-day-challenge!

(+2)

Fun, needs better resolution to go for high scores.

with apple pen 

(+1)

With mouse


(+2)

draw with ahk

F8::
    MouseGetPos, startX, startY
    radius := 600 
    pi:= 4 * ATan(1)
    centerX := startX
    centerY := startY-radius
    step := 120
    Loop,120
    {
        x:=centerX+Round(radius*Sin(A_Index*(360/step)*pi/180),0)
        y:=centerY+Round(radius*Cos(A_Index*(360/step)*pi/180),0)
        MouseMove, x, y, 0
    }
return
ESC::
ExitApp