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authorTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-12-03 11:05:10 -0600
committerTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-12-03 11:05:10 -0600
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-<chapter id="getting-started">
-<title
->Getting Started</title>
-<para
->When you start &kturtle; you will see something like this: <screenshot
-> <screeninfo
->Here is a screenshot of &kturtle; when you start it for the first time</screeninfo
-> <mediaobject
-> <imageobject
-> <imagedata fileref="mainwindow.png" format="PNG"/> </imageobject
-> <textobject
-> <phrase
->&kturtle; Main window</phrase
-> </textobject
-> </mediaobject
-> </screenshot
-> In this Getting Started guide we assume that the language of the &logo; commands is English. You can change this language in <menuchoice
-><guimenu
->Settings</guimenu
-><guimenuitem
->Configure &kturtle;...</guimenuitem
-></menuchoice
-> in the <guilabel
->Language</guilabel
-> section. Be aware that the language you set here for &kturtle; is the one you use to type the &logo; commands.</para>
-
-<sect1 id="first-steps">
-<title
->First steps with &logo;: meet the Turtle!</title>
-<para
->You must have noticed the turtle is in the middle of the canvas: you are just about to learn how to control it using commands in the code editor.</para>
-
-<sect2 id="the-turtle-moves">
-<title
->The Turtle Moves</title>
-<para
->Let us start by getting the turtle moving. Our turtle can do 3 types of moves, (1) it can go forwards and backwards, (2) it can turn left and right and (3) it can go directly to a position on the screen. Try this for example:</para>
-<para>
-<screen
->forward 90
-turnleft 90
-</screen>
-Type or copy-paste the code to the code editor and execute it (using <link linkend="file-execute"
-><menuchoice
-><guimenu
->File</guimenu
-><guimenuitem
->Execute Commands</guimenuitem
-></menuchoice
-></link
->) to see the result.</para>
-
-<para
->When you typed and executed the commands like above in the code editor you might have noticed one or more of the following things:</para>
-<orderedlist>
-<listitem
-><para
->That &mdash; after executing the commands &mdash; the turtle moves up, draws a line, and then turns a quarter turn to the left. This because you have used the <link linkend="forward"
-><userinput
->forward</userinput
-></link
-> and the <link linkend="turnleft"
-><userinput
->turnleft</userinput
-></link
-> commands.</para>
-</listitem>
-<listitem>
-<para
->That the colour of the code changed while you where typing it: this feature is called <emphasis
->intuitive highlighting</emphasis
-> &mdash; different types of commands are highlighted differently. This makes reading large blocks of code more easy.</para>
-</listitem>
-<listitem>
-<para
->That the turtle draws a thin black line.</para>
-</listitem>
-<listitem>
-<para
->Maybe you got an error message. This could simply mean two things: you could have made a mistake while copying the commands, or you should still set the correct language for the &logo; commands (you can do that by choosing <menuchoice
-><guimenu
->Settings</guimenu
-><guimenuitem
->Configure &kturtle;...</guimenuitem
-></menuchoice
->, in the <guilabel
->Language</guilabel
-> section).</para>
-</listitem>
-</orderedlist>
-
-<para
->You will likely understand that <userinput
->forward 90</userinput
-> commanded the turtle to move forward leaving a line, and that <userinput
->turnleft 90</userinput
-> commanded the turtle to turn 90 <glossterm linkend="degrees"
->degrees</glossterm
-> to the left.</para>
-
-<para
->Please see the following links to the reference manual for a complete explanation of the new commands: <userinput
->forward</userinput
->, <userinput
->backward</userinput
->, <userinput
->turnleft</userinput
->, and <userinput
->turnright</userinput
->.</para>
-</sect2>
-
-<sect2 id="more-examples">
-<title
->More examples</title>
-<para
->The first example was very simple, so let us go on!</para>
-
-<para>
-<!--translators: if it's not already there, you can copy/paste the translated code below and save it in arrow.logo in your examples folder: tde-i18n/language-code/data/tdeedu/kturtle/ -->
-<screen
->canvassize 200,200
-canvascolour 0,0,0
-pencolour 255,0,0
-penwidth 5
-clear
-
-go 20,20
-direction 135
-
-forward 200
-turnleft 135
-forward 100
-turnleft 135
-forward 141
-turnleft 135
-forward 100
-turnleft 45
-
-go 40, 100
-</screen>
-Again you can type or copy-paste the code to the code editor or open the <filename
->arrow.logo</filename
-> file in the <guimenu
->Open examples</guimenu
-> folder and execute it (using <link linkend="file-execute"
-><menuchoice
-><guimenu
->File</guimenu
-><guimenuitem
->Execute Commands</guimenuitem
-></menuchoice
-></link
->) to see the result. In the next examples you are expected to know the drill.</para>
-
-<para
->You might have noticed that this second example uses a lot more code. You have also seen a couple of new commands. Here a short explanation of all the new commands:</para>
-
-<para
-><userinput
->canvassize 200,200</userinput
-> sets the canvas width and height to 200 <glossterm linkend="pixels"
->pixels</glossterm
->. The width and the height are equal, so the canvas will be a square.</para>
-
-<para
-><userinput
->canvascolour 0,0,0</userinput
-> makes the canvas black. <userinput
->0,0,0</userinput
-> is an <glossterm linkend="rgb"
->RGB-combination</glossterm
-> where all values are set to <userinput
->0</userinput
->, which results in black.</para>
-
-<para
-><userinput
->pencolor 255,0,0</userinput
-> sets the color of the pen to red. <userinput
->255,0,0</userinput
-> is an <glossterm linkend="rgb"
->RGB-combination</glossterm
-> where only the red value is set to <userinput
->255</userinput
-> (fully on) while the others (green and blue) are set to <userinput
->0</userinput
-> (fully off). This results in a bright shade of red.</para>
-
-<para
-><userinput
->penwidth 5</userinput
-> sets the width (the size) of the pen to <userinput
->5</userinput
-> <glossterm linkend="pixels"
->pixels</glossterm
->. From now on every line the turtle draw will have a thickness of <userinput
->5</userinput
->, until we change the <userinput
->penwidth</userinput
-> to something else.</para>
-
-<para
-><userinput
->clear</userinput
-> clear the canvas, that is all it does.</para>
-
-<para
-><userinput
->go 20,20</userinput
-> commands the turtle to go to a certain place on the canvas. Counted from the upper left corner, this place is 20 <glossterm linkend="pixels"
->pixels</glossterm
-> across from the left, and 20 <glossterm linkend="pixels"
->pixels</glossterm
-> down from the top of the canvas. Note that using the <userinput
->go</userinput
-> command the turtle will not draw a line.</para>
-
-<para
-><userinput
->direction 135</userinput
-> set the turtle's direction. The <userinput
->turnleft</userinput
-> and <userinput
->turnright</userinput
-> commands change the turtle's angle starting from its current direction. The <userinput
->direction</userinput
-> command changes the turtle's angle from zero, and thus is not relative to the turtle previous direction.</para>
-
-<para
->After the <userinput
->direction</userinput
-> command a lot of <userinput
->forward</userinput
-> and <userinput
->turnleft</userinput
-> commands follow. These command do the actual drawing.</para>
-
-<para
->At last another <userinput
->go</userinput
-> command is used to move the turtle aside.</para>
-
-<para
->Make sure you follow the links to the reference. The reference explains each command more thoroughly.</para>
-
-</sect2>
-</sect1>
-
-
-
-<!-- EXTRA SECTIONS CAN BE ADDED TO THE "GETTING STARTED"
-
-<sect1 id="calculations">
-<title
->Simple Calculations</title>
-<para>
-Not yet written
-</para>
-</sect1>
-<sect1 id="using_variables">
-<title
->Using Variables: creating 'number containers'</title>
-<para>
-Not yet written
-</para>
-</sect1>
-<sect1 id="using_strings">
-<title
->Using strings: creating 'text containers'</title>
-<para>
-Not yet written
-</para>
-</sect1>
-<sect1 id="logic">
-<title
->Logic: asking the computer simple questions</title>
-<para>
-Not yet written
-</para>
-</sect1>
-<sect1 id="recursion">
-<title
->Recursion: the Turtle is using itself</title>
-<para>
-Draw a maze for example
-</para>
-</sect1
->-->
-
-
-</chapter> \ No newline at end of file