# 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: DATE\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 #: levels-po/exercises/chapter007/level003/scene_langchar.txt:1 #, no-wrap msgid "E" msgstr "" #. type: Title-text #: levels/exercises/chapter007/level003/scene.txt:1 #, no-wrap msgid "Remote control #5" msgstr "" #. type: Resume-text #: levels/exercises/chapter007/level003/scene.txt:2 #, no-wrap msgid "" "Remote control a bot without using an information exchange post by storing " "the orders." msgstr "" #. type: ScriptName-text #: levels/exercises/chapter007/level003/scene.txt:3 #, no-wrap msgid "Remote5" msgstr "" #. type: \b; header #: levels/exercises/chapter007/level003/help/help.E.txt:1 #, no-wrap msgid "Exercise" msgstr "" #. type: Plain text #: levels/exercises/chapter007/level003/help/help.E.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. " msgstr "" #. type: Plain text #: levels/exercises/chapter007/level003/help/help.E.txt:5 #, no-wrap msgid "The two main actors of this exercise are:\n" msgstr "" #. type: Bullet: '1)' #: levels/exercises/chapter007/level003/help/help.E.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)' #: levels/exercises/chapter007/level003/help/help.E.txt:6 #, no-wrap msgid "" "The slave practice bot which is already programmed and " "just waits for orders from the master." msgstr "" #. type: Plain text #: levels/exercises/chapter007/level003/help/help.E.txt:9 #, no-wrap msgid "" "The orders shall be stored, so the master will be able to transmit several " "orders without waiting for each order being processed. We use an array for this purpose." msgstr "" #. type: \b; header #: levels/exercises/chapter007/level003/help/help.E.txt:10 #, no-wrap msgid "The slave" msgstr "" #. type: Plain text #: levels/exercises/chapter007/level003/help/help.E.txt:12 #, no-wrap msgid "" "First of all we must understand how the program of the slave works. The class order contains two members: " "m_type is the order to execute (move or turn) and " "m_param is the distance to move or the rotation angle¦:" msgstr "" #. type: Plain text #: levels/exercises/chapter007/level003/help/help.E.txt:14 #, no-wrap msgid "public class order" msgstr "" #. type: \s; block (usually verbatim code) #: levels/exercises/chapter007/level003/help/help.E.txt:18 #, no-wrap msgid "" "{\n" "\tint m_type;\n" "\tfloat m_param;\n" "}" msgstr "" #. type: Plain text #: levels/exercises/chapter007/level003/help/help.E.txt:20 #, no-wrap msgid "" "A second class exchange contains the " "mechanism for exchanging the orders. We declare a static class member m_fifo which will " "contain the list of orders to be executed. The word static " "insures that the member m_fifo is shared between all instances " "of the class exchange." msgstr "" #. type: Plain text #: levels/exercises/chapter007/level003/help/help.E.txt:22 #, no-wrap msgid "{" msgstr "" #. type: \s; block (usually verbatim code) #: levels/exercises/chapter007/level003/help/help.E.txt:23 #, no-wrap msgid "" "\tstatic private order m_fifo[] = " "null;" msgstr "" #. type: Plain text #: levels/exercises/chapter007/level003/help/help.E.txt:25 #, no-wrap msgid "" "The put method will be used by the master robot for " "transmitting an order. The order will simply be added at the end of the " "m_fifo array:" msgstr "" #. type: Plain text #: levels/exercises/chapter007/level003/help/help.E.txt:27 #, no-wrap msgid "\tsynchronized void put(order a)" msgstr "" #. type: \s; block (usually verbatim code) #: levels/exercises/chapter007/level003/help/help.E.txt:30 #, no-wrap msgid "" "\t{\n" "\t\tm_fifo[sizeof(m_fifo)] = a;\n" "\t}" msgstr "" #. type: Plain text #: levels/exercises/chapter007/level003/help/help.E.txt:32 #, no-wrap msgid "" "Another method get will be used by the slave to retrieve the " "orders. This method returns the order to be executed. If the list is empty, " "null will be returned and the robot must wait for more " "orders. Otherwise the first order in the list must be returned and the " "remaining orders must be \"scrolled up\". As an array can not be " "\"shortened\" we use a temporary array copy¦:" msgstr "" #. type: Plain text #: levels/exercises/chapter007/level003/help/help.E.txt:34 #, no-wrap msgid "\tsynchronized order get()" msgstr "" #. type: \s; block (usually verbatim code) #: levels/exercises/chapter007/level003/help/help.E.txt:46 #, no-wrap msgid "" "\t{\n" "\t\tif ( sizeof(m_fifo) == 0 ) return null;\n" "\n" "\t\torder a = m_fifo[0];\n" "\t\torder copy[] = null;\n" "\t\tfor ( int i=1 ; iexchange called list. We put () after the word " "list in order to create an instance of the class " "exchange." msgstr "" #. type: Plain text #: levels/exercises/chapter007/level003/help/help.E.txt:50 #, no-wrap msgid "extern void object::Slave5( )" msgstr "" #. type: \s; block (usually verbatim code) #: levels/exercises/chapter007/level003/help/help.E.txt:53 #, no-wrap msgid "" "{\n" "\texchange list();\n" "\torder todo;" msgstr "" #. type: Plain text #: levels/exercises/chapter007/level003/help/help.E.txt:55 #, 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 value different from null, the while loop stops." msgstr "" #. type: Plain text #: levels/exercises/chapter007/level003/help/help.E.txt:57 #, no-wrap msgid "\twhile ( true )" msgstr "" #. type: \s; block (usually verbatim code) #: levels/exercises/chapter007/level003/help/help.E.txt:64 #, no-wrap msgid "" "\t{\n" "\t\twhile ( true )\n" "\t\t{\n" "\t\t\ttodo = list.get();\n" "\t\t\tif ( todo != null ) break;\n" "\t\t\twait(1);\n" "\t\t}" msgstr "" #. type: Plain text #: levels/exercises/chapter007/level003/help/help.E.txt:66 #, 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 #: levels/exercises/chapter007/level003/help/help.E.txt:68 #, no-wrap msgid "\t\tif ( todo.m_type == 1 )" msgstr "" #. type: \s; block (usually verbatim code) #: levels/exercises/chapter007/level003/help/help.E.txt:81 #, no-wrap msgid "" "\t\t{\n" "\t\t\tmove(todo.m_param);\n" "\t\t}\n" "\t\telse if ( todo.m_type == 2 )\n" "\t\t{\n" "\t\t\tturn(todo.m_param);\n" "\t\t}\n" "\t\telse\n" "\t\t{\n" "\t\t\tmessage(\"Unknown order\");\n" "\t\t}\n" "\t}\n" "}" msgstr "" #. type: \b; header #: levels/exercises/chapter007/level003/help/help.E.txt:82 #, no-wrap msgid "The master" msgstr "" #. type: Plain text #: levels/exercises/chapter007/level003/help/help.E.txt:84 #, no-wrap msgid "" "In the master we write a function called SendOrder which will " "send an order to the slave:" msgstr "" #. type: Plain text #: levels/exercises/chapter007/level003/help/help.E.txt:86 #, no-wrap msgid "void object::SendOrder(float order, float param)" msgstr "" #. type: \s; block (usually verbatim code) #: levels/exercises/chapter007/level003/help/help.E.txt:94 #, no-wrap msgid "" "{\n" "\texchange list();\n" "\torder todo();\n" "\t\n" "\ttodo.m_type = order;\n" "\ttodo.m_param = param;\n" "\tlist.put(todo);\n" "}" msgstr "" #. type: Plain text #: levels/exercises/chapter007/level003/help/help.E.txt:96 #, no-wrap msgid "Now the main program of the master is very simple:" msgstr "" #. type: Plain text #: levels/exercises/chapter007/level003/help/help.E.txt:98 #, no-wrap msgid "extern void object::Remote5( )" msgstr "" #. type: \s; block (usually verbatim code) #: levels/exercises/chapter007/level003/help/help.E.txt:109 #, no-wrap msgid "" "{\n" "\tSendOrder(1, 20); // move(20);\n" "\tSendOrder(2, 90); // turn(90);\n" "\tSendOrder(1, 20); // move(20);\n" "\tSendOrder(2, 90); // turn(90);\n" "\tSendOrder(1, 10); // move(10);\n" "\tSendOrder(2, 90); // turn(90);\n" "\tSendOrder(1, 10); // move(10);\n" "\tSendOrder(2,-90); // turn(-90);\n" "\tSendOrder(1, 10); // move(10);\n" "}" msgstr "" #. type: Plain text #: levels/exercises/chapter007/level003/help/help.E.txt:111 #, no-wrap msgid " show these instruction at any time." msgstr "" #. type: \t; header #: levels/exercises/chapter007/level003/help/help.E.txt:112 #, no-wrap msgid "See also" msgstr "" #. type: Plain text #: levels/exercises/chapter007/level003/help/help.E.txt:113 #, no-wrap msgid "Controls and programming." msgstr ""