# SimpleTron3x.py
#
# Yes I know it is not much of a game but it is intended to show how to
# "draw", AND, to use the keyboard to "draw" inside a standard text mode
# Python shell.
#
# Written in such a way as to easily understand how it works.
#
# IMPORTANT NOTE!!! This ASSUMES a standard 80 x 24 shell window.
#
# This working idea is copyright, (C)2011, B.Walker, G0LCU.
# NOW issued as Public Domain...
#
# To run at the prompt...
# >>> exec(open("/full/path/to/SimpleTron3x.py").read())
def main():
import os
import sys
import termios
import tty
import random
# A basic clear screen and cursor removal for program start...
os.system("clear")
os.system("setterm -cursor off")
# Make any variables global just for this DEMO "game"...
global screen_array
global character
global line
global position
global remember_attributes
global plot
global inkey_buffer
global score
screen_array="*"
character="a"
remember_attributes="(C)2011, B.Walker, G0LCU."
line=1
position=0
plot=int(random.random()*4)
inkey_buffer=0
score=0
# This is a working function; something akin to the BASIC INKEY$ function...
# Reference:- http://code.activestate.com/recipes/134892-getch-like-unbuffered-character-reading-from-stdin/
# Many thanks to Danny Yoo for the above code, modified to suit this program...
# In THIS FUNCTION some special keys do a "break" similar to the "Esc" key inside the program.
# Be aware of this...
# An inkey_buffer value of 0, zero, generates a "" character and carries on instead of waiting for
# a valid ASCII key press.
def inkey():
fd=sys.stdin.fileno()
remember_attributes=termios.tcgetattr(fd)
tty.setraw(sys.stdin.fileno())
character=sys.stdin.read(inkey_buffer)
termios.tcsetattr(fd, termios.TCSADRAIN, remember_attributes)
return character
# The welcome screen.
print("")
print("SimpleTron3x.py. A simple, odd style, Tron(ish) game.")
print("Another DEMO 2D animation for Linux platforms.")
print("")
print("You control a vehicle leaving a trail behind it.")
print("")
print("It is NOT always moving, and if it crosses any part")
print("of the trail or border, (* characters), the game")
print("is over. It CAN randomly move further than the key")
print("presses so do not assume there is a bug... :)")
print("Use the Q and A keys to change the direction to")
print("up and down, and O and P for left and right.")
print("See how long you can survive! Score at the end.")
print("")
character=input("Hit <RETURN/ENTER> to begin... ")
# Generate the game window as a single text string.
# This assumes a standard 80x24 terminal text window.
# Top line.
while position<=78:
screen_array=screen_array+"*"
position=position+1
# Next 20 lines.
while line<=20:
position=1
screen_array=screen_array+"*"
while position<=78:
screen_array=screen_array+" "
position=position+1
screen_array=screen_array+"*"
line=line+1
screen_array=screen_array+"*"
# Bottom line.
position=0
while position<=78:
screen_array=screen_array+"*"
position=position+1
# Store the complete string for future use.
gamefile=open("/tmp/TronArray","w+")
gamefile.write(screen_array)
gamefile.close()
# End of game setup...
# Start of game proper, set the initial position.
position=(int(random.random()*60)+890)
while 1:
# Standard clear the terminal window.
os.system("clear")
print(screen_array)
# Add another * when inkey_buffer=0.
inkey_buffer=int(random.random()*2)
# Use the INKEY$ function to grab an ASCII key.
character=inkey()
if character=="a": plot=0
if character=="A": plot=0
if character=="q": plot=1
if character=="Q": plot=1
if character=="o": plot=2
if character=="O": plot=2
if character=="p": plot=3
if character=="P": plot=3
# Esc key to exit the loop...
if character==chr(27): break
if plot==0: position=position+80
if plot==1: position=position-80
if plot==2: position=position-1
if plot==3: position=position+1
if position>=1759: position=1759
if position<=0: position=0
gamefile=open("/tmp/TronArray","r+")
# Check for a * character in the array and......
gamefile.seek(position)
if gamefile.read(1)=="*":
# ......exit if one exists at that point.
gamefile.close()
print("Game Over! You scored",score,"\b...")
break
gamefile.seek(position)
gamefile.write("*")
# Now get the whole array.
gamefile.seek(0)
screen_array=gamefile.read(1760)
gamefile.close()
# End of screen_array update per plot.
score=score+1
# Reset the cursor, etc...
os.system("setterm -cursor on")
character=input("Have another game? (Y/N):- ")
if character=="y": main()
if character=="Y": main()
if character=="": main()
main()
# SimpleTron3x.py end of game.
# Enjoy finding simple solutions to often very difficult questions.
