I'm not sure where the issue lies. I'm attempting to run a packaged Blender
game as a Node child process. I use the stdin and stdout streams to
communicate between the two. I've tested it already, and have verified I
can send data to and receive data from the Blender game. However, I must
call stdin.end() after the initial message is sent, otherwise the program
hangs. But if I call stdin.end(), I end that stream and can no longer
communicate between the Node process and the game. I intend to do most of
my scripting in Javascript, and might ultimately pick up Unity over
Blender. I've been using Blender for a number of years, so it's really just
old-dog mentality that's keeping me from making the move. But I'm not sure
that would solve my issue anyway.
This is the script I use to spawn the Blender game, and send a message to
the game (I copied this from an example on Stack Exchange).
//start.js
var spawn = require('child_process').spawn,
blend = spawn('test.exe', []),
data = [1,2,3,4,5,6,7,8,9],
dataString = '';
blend.stdout.on('data', function(data){
dataString += data.toString();
});
blend.stdout.on('end', function(){
console.log('Sum of numbers=',dataString);
});
blend.stdin.write(JSON.stringify(data));
blend.stdin.end();
This is the script I use in the Blender game, in conjunction with the above
(also copied, and modified, from the Stack Exchange example).
import bge
import sys, json
import select
cont = bge.logic.getCurrentController()
own = cont.owner
"""
Client Data Handling
"""
def ReadSTDIn():
data = []
if select.select([sys.stdin,],[],[],0.0)[0]:
lines = sys.stdin.readlines()
if len(lines) >= 1:
for line in json.loads(lines[0]):
data.append(line)
return data
def SendSTDOut(data):
print(data+"\n")
return 1
def DataHandler():
lines = ReadSTDIn()
send = ""
for line in lines:
if line == "test":
send = "test sat"
SendSTDOut(send)
return 1
"""
Logic Interval Stuff
"""
def GetLocation():
wp = own.worldPodition()
for coord in wp:
SendSTDOut(coord)
def Interval():
GetLocation()
return 1
def Main():
DataHandler()
Interval()
return 1
Main()
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