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# Generates a rule tree using a given Python transition function
# passed in via the clipboard.
# Here's an example function for Conway's Life
# (copy all the lines between the triple quotes):
'''
# B3/S23:
name = "LifeTest"
n_states = 2
n_neighbors = 8
# order for 8 neighbors is NW, NE, SW, SE, N, W, E, S, C
def transition_function(a):
n = a[0]+a[1]+a[2]+a[3]+a[4]+a[5]+a[6]+a[7]
if n==2 and a[8]==1:
return 1
if n==3:
return 1
return 0
'''
# Another example, but using the vonNeumann neighborhood:
'''
name = "ParityNWE"
n_states = 5
n_neighbors = 4
# order for 4 neighbors is N, W, E, S, C
def transition_function ( s ) :
return ( s[0] + s[1] + s[2] ) % 5
'''
import golly
from glife.RuleTree import *
# exec() only works if all lines end with LF, so we need to convert
# any Win line endings (CR+LF) or Mac line endings (CR) to LF
CR = chr(13)
LF = chr(10)
try:
exec(golly.getclipstr().replace(CR+LF,LF).replace(CR,LF))
MakeRuleTreeFromTransitionFunction( n_states, n_neighbors, transition_function,
golly.getdir("rules")+name+".tree" )
# use name.tree to create name.rule (with no icons);
# note that if name.rule already exists then we only replace the info in
# the @TREE section to avoid clobbering any other info added by the user
ConvertTreeToRule(name, n_states, [])
golly.setalgo("RuleLoader")
golly.setrule(name)
golly.show("Created "+golly.getdir("rules")+name+".rule and switched to that rule.")
except:
import sys
import traceback
exception, msg, tb = sys.exc_info()
golly.warn(\
'''To use this script, copy a Python format rule definition into the clipboard, e.g.:
name = "ParityNWE"
n_states = 5
n_neighbors = 4
# order for 4 neighbors is N, W, E, S, C
def transition_function ( s ) :
return ( s[0] + s[1] + s[2] ) % 5
For more examples, see the script file (right-click on it).
____________________________________________________
A problem was encountered with the supplied rule:
'''+ '\n'.join(traceback.format_exception(exception, msg, tb)))
golly.exit()
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