#! /usr/bin/env python3 ############################################################################### # (c) Roger Whittaker 2015-2023 # roger@disruptive.org.uk # Free software licenced under the GPL ############################################################################### from cgi import FieldStorage from html import escape from subprocess import Popen, PIPE ############################################################################### from checkform import good from config import url ############################################################################### print("Content-Type: text/html") print() print("") print("") print("") print('') print("Generalised Penrose Pattern Generator") print("") print("") print( '

Generalised Penrose pattern generator

' ) print('') print("") print( '") print('
' ) print("

gppg

") print("
") print('
') print('
') print( '
' ) print('
') print('
') print(' ') print( '
' ) print('
') print(' Reset
') print("
") print('About gppg
') print("

Sample patterns

") print( 'Classic Penrose (all g = 0.2)
' ) print( 'Classic Penrose (all g = 0.4)
' ) print( 'n = 5, all g = 0.5
' ) print( 'n = 8, all g = 0.125
' ) print( 'n = 7, all g = 0.5
' ) print( 'n = 9, no central symmetry
' ) print("
") print( 'In memory of EJW Whittaker

' ) print("		') def stick(lst): out = lst[0] for i in lst[1:]: out = out + "+" + i return out form = FieldStorage() if not good(form): print("

Incomplete or incorrect form values entered: please retry

") print( '

' ) print("") exit() else: parlist = [] if "params" in form: parlist = form["params"].value.split() pars = "" for par in parlist: pars = pars + " " + par if "iterations" in form: it = form["iterations"].value else: print( '' ) exit() if "scale" in form: sc = form["scale"].value else: print( '' ) exit() command = "./gppg -t svg " + " " + it + " " + sc + " " + pars output = Popen(command.split(), stdout=PIPE).communicate()[0] it = escape(form["iterations"].value) sc = escape((form["scale"]).value) pa = escape(stick(parlist)) v = "?iterations=" + it + "&scale=" + sc + "¶ms=" + pa lnk0 = 'view pdf" lnk1 = ( 'download pdf" ) lnk2 = ( 'download postscript
" ) lnk3 = ( 'download svg
" ) print('
\n') print(output.decode()) print("
\n") print("") print('') print( "

" + lnk0 + "

" + "

" + lnk1 + "

" + "

" + lnk2 + "

" + "

" + lnk3 + "

" ) print("") print("")