# 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 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.