area_np.py

Created by tlake

Created on June 20, 2023

822 Bytes

Computes the area of a polygon of any shape

# area_np
from math import *

def load_pts():
    pts=[]
    pts.append([4.5,-1.5])
    pts.append([8,2])
    pts.append([.5,4])
    pts.append([-1.5,.5])
    pts.append([.5,-2])
    pts.append([1,1])
    return pts

def area_pts(pts):
    area=0
    pts.append(pts[0])
    for i in range(len(pts)-1):
        a=pts[i][0]+pts[i+1][0]
        b=pts[i][1]-pts[i+1][1]
        area+=a*b
    return abs(area/2)

def ask_pts():
    pts=[]
    while True:
        try:
            print("Coordinate ",len(pts)+1)
            x=float(input("x: "))
            y=float(input("y: "))
            pts.append([x,y])
        except:
            break
    return pts

print("1. ask_pts")
print("2. load_pts")
n=int(input("? "))
if n==1:
    pts=ask_pts()
else:
    pts=load_pts()
area=area_pts(pts)
print("Area: ",area)