#!/usr/bin/env python3

# 3D PLOT
#
# Converted from BASIC to Python by Trevor Hobson

import math


def equation(input):
    return 30 * math.exp(-input * input / 100)


print(" " * 32 + "3D PLOT")
print(" " * 15 + "CREATIVE COMPUTING  MORRISTOWN, NEW JERSEY\n\n\n\n")

for x in range(-300, 315, 15):
    x1 = x / 10
    l = 0
    y1 = 5 * math.floor(math.sqrt(900 - x1 * x1) / 5)
    yPlot = [" "] * 80

    for y in range(y1, -(y1 + 5), -5):
        z = math.floor(25 + equation(math.sqrt(x1 * x1 + y * y)) - 0.7 * y)
        if z > l:
            l = z
            yPlot[z] = "*"
    print("".join(yPlot))