# SOME DESCRIPTIVE TITLE # Copyright (C) YEAR Free Software Foundation, Inc. # This file is distributed under the same license as the PACKAGE package. # FIRST AUTHOR , YEAR. # #, fuzzy msgid "" msgstr "" "Project-Id-Version: PACKAGE VERSION\n" "POT-Creation-Date: 2014-01-01 16:50+0100\n" "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n" "Last-Translator: FULL NAME \n" "Language-Team: LANGUAGE \n" "Language: \n" "MIME-Version: 1.0\n" "Content-Type: text/plain; charset=UTF-8\n" "Content-Transfer-Encoding: 8bit\n" #. type: One-char language identifier #: train701.languagecode:1 #, no-wrap msgid "E" msgstr "P" #. type: Title-text #: train701/scene.txt:1 #, no-wrap msgid "train701:Remote control #3" msgstr "train701:Zdalna kontrola #3" #. type: Resume-text #: train701/scene.txt:2 #, no-wrap msgid "train701:Remote control a bot without using an information exchange post by using a string." msgstr "train701:Zdalnie kontroluj robota bez użycia stacji przekaźnikowej używając zmiennej zawierającej tekst." #. type: ScriptName-text #: train701/scene.txt:3 #, no-wrap msgid "train701:Remote3" msgstr "train701:Zdalnie3" #. type: \b; header #: train701-help/tremote3.txt:1 #, no-wrap msgid "Exercice" msgstr "" #. type: Plain text #: train701-help/tremote3.txt:3 #, no-wrap msgid "Remote control a slave robot without using an information exchange post. The robot should pass over the 6 blue crosses. You must use a string to pass the orders to the slave bot. This string contains the order the slave shoud execute, for exemple \"move(20)\". You can see that this is the same syntax as used in the CBOT language but we could have chosen any other syntax for exemple something like \"advance=20\". The string will be a static class member that will be used to communicate from the master to the slave." msgstr "" #. type: Plain text #: train701-help/tremote3.txt:5 #, no-wrap msgid "The two main actors of this exercise are:\n" msgstr "" #. type: Bullet: '1)' #: train701-help/tremote3.txt:5 #, no-wrap msgid "The wheeled grabber without an energy pack and therefore immobile. This is the master you should program so it will transmit orders to the slave." msgstr "" #. type: Bullet: '2)' #: train701-help/tremote3.txt:6 #, no-wrap msgid "The slave practice bot which is already programmed and just waits for orders from the master." msgstr "" #. type: \b; header #: train701-help/tremote3.txt:8 #, no-wrap msgid "The slave" msgstr "" #. type: Plain text #: train701-help/tremote3.txt:10 #, no-wrap msgid "First of all we must understand how the program of the slave works. The class exchange contains the mechanism for exchaning the orders. We declare a static class member m_order which will contain the order to be executed. The word static insures that the member m_order is shared between all instances of the class exchange." msgstr "" #. type: Plain text #: train701-help/tremote3.txt:12 #, no-wrap msgid "public class exchange" msgstr "" #. type: \s; block (usually verbatim code) #: train701-help/tremote3.txt:14 #, no-wrap msgid "" "{\n" "\tstatic private string m_order = \"\";" msgstr "" #. type: Plain text #: train701-help/tremote3.txt:16 #, no-wrap msgid "The put method will be used by the master robot for transmitting an order. As long as the string m_order is not empty, the slave has not finished the order and the put method will return false and will do nothing." msgstr "" #. type: Plain text #: train701-help/tremote3.txt:18 #, no-wrap msgid "\tsynchronized bool put(string order)" msgstr "" #. type: \s; block (usually verbatim code) #: train701-help/tremote3.txt:29 #, no-wrap msgid "" "\t{\n" "\t\tif ( m_order == \"\" )\n" "\t\t{\n" "\t\t\tm_order = order;\n" "\t\t\treturn true;\n" "\t\t}\n" "\t\telse\n" "\t\t{\n" "\t\t\treturn false;\n" "\t\t}\n" "\t}" msgstr "" #. type: Plain text #: train701-help/tremote3.txt:31 #, no-wrap msgid "Another method get will be used by the slave to retrieve the orders. This method returns the string contained in m_order and empties it, so a new order can be accepted:" msgstr "" #. type: Plain text #: train701-help/tremote3.txt:33 #, no-wrap msgid "\tsynchronized string get()" msgstr "" #. type: \s; block (usually verbatim code) #: train701-help/tremote3.txt:39 #, no-wrap msgid "" "\t{\n" "\t\tstring ret = m_order;\n" "\t\tm_order = \"\";\n" "\t\treturn ret;\n" "\t}\n" "}" msgstr "" #. type: Plain text #: train701-help/tremote3.txt:41 #, no-wrap msgid "The main program of the slave contains an instance of the class exchange called list." msgstr "" #. type: Plain text #: train701-help/tremote3.txt:43 #, no-wrap msgid "extern void object::Slave3( )" msgstr "" #. type: \s; block (usually verbatim code) #: train701-help/tremote3.txt:46 #, no-wrap msgid "" "{\n" "\texchange list();\n" "\tstring todo;" msgstr "" #. type: Plain text #: train701-help/tremote3.txt:48 #, no-wrap msgid "The outer while loop lasts for ever. The inner while loop waits for an order by using the get method of the exchange class. As soon as get returns a non empty string, the while loop stops." msgstr "" #. type: Plain text #: train701-help/tremote3.txt:50 #, no-wrap msgid "\twhile ( true )" msgstr "" #. type: \s; block (usually verbatim code) #: train701-help/tremote3.txt:57 #, no-wrap msgid "" "\t{\n" "\t\twhile ( true )\n" "\t\t{\n" "\t\t\ttodo = list.get();\n" "\t\t\tif ( todo != \"\" ) break;\n" "\t\t\twait(1);\n" "\t\t}" msgstr "" #. type: Plain text #: train701-help/tremote3.txt:59 #, no-wrap msgid "Now we have received the order in the todo variable. All we have to do is execute it:" msgstr "" #. type: Plain text #: train701-help/tremote3.txt:61 #, no-wrap msgid "\t\tif ( strfind(todo, \"move\") == 0 )" msgstr "" #. type: \s; block (usually verbatim code) #: train701-help/tremote3.txt:70 #, no-wrap msgid "" "\t\t{\n" "\t\t\tmove(strval(strmid(todo,5)));\n" "\t\t}\n" "\t\tif ( strfind(todo, \"turn\") == 0 )\n" "\t\t{\n" "\t\t\tturn(strval(strmid(todo,5)));\n" "\t\t}\n" "\t}\n" "}" msgstr "" #. type: \b; header #: train701-help/tremote3.txt:71 #, no-wrap msgid "The master" msgstr "" #. type: Plain text #: train701-help/tremote3.txt:73 #, no-wrap msgid "In the master we write an function called SendOrder which will send an order to the slave:" msgstr "" #. type: Plain text #: train701-help/tremote3.txt:75 #, no-wrap msgid "void object::SendOrder(string order)" msgstr "" #. type: \s; block (usually verbatim code) #: train701-help/tremote3.txt:83 #, no-wrap msgid "" "{\n" "\texchange list();\n" "\t\n" "\twhile ( list.put(order) == false )\n" "\t{\n" "\t\twait(1);\n" "\t}\n" "}" msgstr "" #. type: Plain text #: train701-help/tremote3.txt:86 #, no-wrap msgid "" "The while loop waits until a pending order has been terminated, that is the slaved has exited from the get method.\n" "Now the main program of the master is very simple:" msgstr "" #. type: Plain text #: train701-help/tremote3.txt:88 #, no-wrap msgid "extern void object::Remote3( )" msgstr "" #. type: \s; block (usually verbatim code) #: train701-help/tremote3.txt:99 #, no-wrap msgid "" "{\n" "\tSendOrder(\"move(20)\");\n" "\tSendOrder(\"turn(90)\");\n" "\tSendOrder(\"move(20)\");\n" "\tSendOrder(\"turn(90)\");\n" "\tSendOrder(\"move(10)\");\n" "\tSendOrder(\"turn(90)\");\n" "\tSendOrder(\"move(10)\");\n" "\tSendOrder(\"turn(-90)\");\n" "\tSendOrder(\"move(10)\");\n" "}" msgstr "" #. type: Plain text #: train701-help/tremote3.txt:101 #, no-wrap msgid " show these instruction at any time." msgstr "" #. type: \t; header #: train701-help/tremote3.txt:102 #, no-wrap msgid "See also" msgstr "" #. type: Plain text #: train701-help/tremote3.txt:103 #, no-wrap msgid "Controls and programming." msgstr ""