128 lines
3.5 KiB
Python
Executable file
128 lines
3.5 KiB
Python
Executable file
#!/usr/bin/python3
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# -*- coding: utf-8 -*-
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import os, sys, termios, tty, time, random
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from math import sin, cos, tan, sqrt
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from time import sleep
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# Randomly choose a cow
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cows = "🐵🐒🦍🦧🐕🐯🦝🐩🐅🐴🐎🦄🦌🐗🐂🐃🐄🐪🐫🦙🦒🐹🦘🦡🐧🕊️🦅🦆🦉🐍🦎🐊🦜🦚🦩🐲🐉🦕"
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cowlistlength = len(cows)
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cow = cows[random.randint(0, cowlistlength - 1)]
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cowlength = len(cow)
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# Needed: find our screensize
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termsize_xy = os.get_terminal_size()
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xmax = termsize_xy[0] - 1
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ymax = termsize_xy[1]
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ymin = 0
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xmin = 0
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xold = xmin
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# pi is not defined by default
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pi = 3.1416
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deg2rad = pi / 180
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# position cursor at x,y - where x=0 y=0 is the left lower corner like in mathematical diagrams
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def curpos(x, y):
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print("\033[%d;%dH" % (ymax - y, x), end="", flush=True)
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outputfile = open("cowyeetflugbahn.txt", "w")
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# CTRL and ESC-codes for the used outputdevice. Probably a terminal.
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clear, home, curoff, curon = "'\x1b[2J\x1b[H", "\x1b[H", "\x1b[?25l", "\x1b[?25h"
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# some scales, we need
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# not everything has to be recomputed in loops.
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xsteps = xmax
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x = 0
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y = x**2
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erde = 9.81
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mond = 1.6
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jupiter = 24
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gravitation = erde
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# in scala the resulting coordinates will be returned
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scala = []
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# used, if input is disabled
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starthoehe = 0
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startwinkel = 26 * deg2rad
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startgeschwindigkeit = 36
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loeschen = "y"
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bla = input("Parameter editieren (y) oder Vorgabe nutzen?")
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if bla == "y":
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# Be a friendly host, lets have a talk.
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# comment out to speed up testing
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starthoehe = float(input("Starthöhe in Metern, empf: 0-20: "))
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startwinkel = float(input("Startwinkel 0° - 90°: ")) * deg2rad
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startgeschwindigkeit = float(input("Startgeschwindigkeit Meter (zb 20) pro Sekunde: "))
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loeschen = input("Kuh löschen? (y/n)")
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####
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# Calculate time of flight
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flugdauer = startgeschwindigkeit * sin(startwinkel) / gravitation
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schlafdauer = flugdauer / xmax
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# Calculate maximum height
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hoehe = 0.5 * gravitation * flugdauer**2 + starthoehe
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# calculate length of flight
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wurfweite = (
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startgeschwindigkeit
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* cos(startwinkel)
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* (startgeschwindigkeit * sin(startwinkel) + sqrt(startgeschwindigkeit**2 * sin(startwinkel) ** 2 + 2 * gravitation * starthoehe))
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) / gravitation
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# init screen and wait for userinput
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print(clear, curoff)
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print(
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"xteps: ",
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xsteps,
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"\nwurfweite: ",
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wurfweite,
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"\nstartwinkel: ",
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startwinkel / deg2rad,
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"\nstartgeschwindigkeit: ",
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startgeschwindigkeit,
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"\nstarthoehe: ",
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starthoehe,
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"\nhoehe: ",
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hoehe,
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"\nschlafdauer: ",
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schlafdauer,
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)
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bla = input("CR please:")
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# position cursor down left corner
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curpos(1, ymax)
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# cowlength is 2, if cow is an UTF8-Icon, otherwise 1
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for x in range(xmin, xsteps - 1, cowlength):
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# the formula, which generates the y position for the corresponding x, shamelessly ripped from some schoolbook and modified.
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yold = y
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y = (-(gravitation / (2 * startgeschwindigkeit**2 * cos(startwinkel) ** 2)) * x**2) + (tan(startwinkel) * x + starthoehe)
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time.sleep(schlafdauer)
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# Ensure, that nothing has to be drawn outside the viewport
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if y < ymax and y > ymin:
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curpos(x, y)
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print(cow, end="")
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# Stash awa the coordinates into scala, which will be returned
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scala += [x, int(y * 10 + 5) / 10]
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if loeschen == "y":
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curpos(xold, yold)
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print(" ", end="")
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else:
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scala += [x, 0]
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xold = x
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curpos(0, 0)
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outputfile.write(str(scala))
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sys.exit(curon + "Moooooooooooo.")
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