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<!-- addedByLfdynahead ver 1.5 --><TABLE ALIGN="right" border=0><TR><TD ALIGN="right"><FONT SIZE="-1" FACE="Arial,Helvetica">This document is available in: <A href="../../English/September2003/article307.shtml">English</a> &nbsp;<A href="../../Castellano/September2003/article307.shtml">Castellano</a> &nbsp;<A href="../../Deutsch/September2003/article307.shtml">Deutsch</a> &nbsp;<A href="../../Francais/September2003/article307.shtml">Francais</a> &nbsp;<A href="../../Turkce/September2003/article307.shtml">Turkce</a> &nbsp;</FONT></TD></TR></TABLE><br>
 


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<img src="../../common/images/katjasocher.gif" alt=
    "[Photo of the Author]" height="148" width="120">
<BR>by  Katja Socher <br> <small>&lt;katja/at/linuxfocus.org&gt;</small>
<BR><BR>
<I>About the author:</I><BR>
<!-- aboutauthor_start -->
<p>Katja is the German editor of LinuxFocus. She likes Tux,
    computer graphics, film &amp; photography and the sea. Her
    homepage can be found <a href=
    "http://www.toppoint.de/%7Eutuxfan/k/">here</a>.</p>
<!-- aboutauthor_stop -->
<!-- TRANSLATED TO en -->
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<BR><i>Content</i>:
<UL>
  <LI><A HREF="#307lfindex0">Going 3D with Blender: A toy train</A></LI>
  <LI><A HREF="#307lfindex1">Building the last wagon first</A></LI>
  <LI><A HREF="#307lfindex2">The dark blue wagon</A></LI>
  <LI><A HREF="#307lfindex3">The orange wagon with red and green cylinders</A></LI>
  <LI><A HREF="#307lfindex4">The red and green wagon</A></LI>
  <LI><A HREF="#307lfindex5">The orange wagon</A></LI>
  <LI><A HREF="#307lfindex6">The light blue wagon</A></LI>
  <LI><A HREF="#307lfindex7">The connection between the wagons</A></LI>
  <LI><A HREF="#307lfindex8">The locomotive</A></LI>
  <LI><A HREF="#307lfindex9">Finally</A></LI>
  <LI><A HREF="#307lfindex10">References</A></LI>
  <LI><A HREF="http://cgi.linuxfocus.org/cgi-bin/lftalkback?anum=307">Talkback form for this article</A></LI>
</UL>

</TD></TR></TABLE>
<!-- HEAD OF THE ARTICLE -->
<br>&nbsp;
<table border="0"><tr><td>
<H2>Going 3D with Blender: A toy train</H2>
 <img src="../../common/images/article307/toytrain.gif" width=
    "300" height="199" alt="[tux with toytrain]" vspace="10"
    hspace="10">
<!-- ABSTRACT OF THE ARTICLE -->
<P><i>Abstract</i>:
<P>
<!-- articleabstract_start -->

    In this second article in our series about modeling with
    Blender we create a little toy train. We assume that you have
    read the first article <a href=
    "../July2003/article305.shtml">Going 3D with Blender: Very
    first steps</a> and built that little stage yourself as we are
    now using it as our starting point.

    
<!-- articleabstract_stop -->

<br><!-- HR divider --><center><font color="#8282e0"><b>_________________ _________________ _________________</b></font></center><br>
</td></tr></table>
<!-- BODY OF THE ARTICLE -->


    <A NAME="307lfindex0">&nbsp;</A>
<H2>Going 3D with Blender: A toy train</H2>


    <p>Look at the illustration picture above and imagine it
    without the Tux penguin. We are now going to create a similar
    toy train.<br>
    <br>
     Open the default.blend file with our stage settings that we
    created last time as the starting point for our toy train. (In
    case you saved them with the sphere and the cube select them by
    a right click while holding shift down and press x to delete
    them.) We will begin with modeling the last wagon. I still
    used Blender version 2.27 when writing this article.</p>

    <A NAME="307lfindex1">&nbsp;</A>
<H2>Building the last wagon first</H2>

    To build it we start with a cube (for the green part): In front
    view press Space and then Add--&gt;Mesh--&gt;Cube. Then press
    tab to leave edit mode. With the cube still selected press s
    (in front view) and scale the cube down so that it has the
    right height. For the length press s again and hold the middle
    mouse button down while moving the mouse to the right. This way
    you restrain the change in size to the side you are moving the
    mouse. Finally for the width go to side view, press s and again
    move the mouse to the right while holding the middle mouse
    button down. <br>
    <br>
     Sometimes you will find that Blender doesn't want to do what
    you intended to do. So you also have the possibility to work
    with numerical values. Just hit n to get to the menu and change
    the x,y and z values accordingly. <br>
    <br>
     To give it a green colour go to the material button and the
    white button, click "add new" and change the colour to green
    (to get exactly my colour: R=0, G=0.82 and B=0). You can either
    move the sliders with the mouse or you can left click on the
    letters and then type in the values. <br>
    <br>
    Now we need wheels for our wagon. In front view press Space,
    then Add--&gt;Mesh--&gt;Cylinder (leave the vertices at their
    default value of 32) and tab to leave edit mode. Make the
    cylinder a bit smaller and thinner as you did with the cube: in
    side view first press s and scale the whole cylinder down then
    press s again and hold the middle mouse button down while
    moving the mouse to the right (or hit n to use the numerical
    values) to make the cylinder thinner. Give it a red material
    (go to the material button, then press the white button and
    "Add new" and move RGB to 1, 0 and 0 respectively), then in top
    and front view place it (press g and move the mouse) on one
    side of the wagon. The first wheel is ready.<br>
    <br>
    Copy it by pressing shift + d and move (press g) the second
    wheel to its place. Repeat this until you have all four wheels
    in place. <br>
    <br>

    <center>
      <img src=
      "../../common/images/article307/toytrainlastwaggonsmall.png"
      width="400" height="314" alt="[last wagon of toytrain]"
      vspace="10" hspace="10"><br>
      Fig.1 Wheels and green part of the last wagon
    </center>
    <br>
    Now we still need to build the yellow load of the wagon. In
    side view hit Space--&gt; Add--&gt;Mesh--&gt;Cylinder, then tab
    and in top view scale it down (press s) so that the width is as
    big as the width of the green part. Now press s again and
    restrain the scaling to the length again (move the mouse to the
    right while holding the middle mouse button down or hit n to
    use numerical values). The load should fit exactly on the
    wagon. Now click g and in front view place the load on the
    wagon if you haven't done it already and by going to the
    material button, clicking "Add new" and changing the colour
    sliders to R=1, G=1 and B=0 you change the colour of the load
    to yellow. The first wagon is ready! Congratulations! <br>


    <A NAME="307lfindex2">&nbsp;</A>
<H2>The dark blue wagon</H2>

    Next is the dark blue wagon which is quite easy to build as
    you probably already see. In front and top view just select the
    green cube and the four red wheels by right clicks while
    holding shift down (in case some other part is also selected
    unselect it by another right click while still holding shift down)
    and then duplicate it by pressing shift + d. In top view move
    it to the left and place it besides the other wagon. In front
    view change the height of the wagon by right clicking on the
    cube, then clicking on s and moving the mouse upwards a bit
    while holding the middle mouse button pressed. Now move the
    whole cube a bit up and give it a dark blue colour by going to
    the material button, click "add new" and move the RGB sliders
    to blue (R=0, G=0, B=1). <br>
    <br>
    It might be a good idea to name the materials according to
    their colour. So left click in the field that starts with MA:
    and replace the default Material.00x by typing blue. Do the
    same for the red, yellow and green materials (e.g. select a
    wheel and go to the material button, the red colour is shown
    now, left click in the field that starts with MA: and replace
    the default Material.00x by typing red and so on.) <br>
    <br>

    <center>
      <img src="../../common/images/article307/bluematerial.png"
      width="242" height="68" alt="[material field]" vspace="10"
      hspace="10"><br>
      Fig.2 Naming the blue material "blue"
    </center>
    <br>
     By the way you can use + and - of the numpad to zoom in and
    out of your views. If you want to change the section that is
    visible after you have zoomed in for example you can move
    within the view by pressing shift and the middle mouse button
    while moving the mouse.<br>
    <br>
    Depending on how big you have made the two wagons it can be
    necessary to scale them down when you add more wagons as you
    won't be able to see them on your rendered image otherwise.
    Just select all objects that belong to the train either by
    clicking b and marking (draw a rectangle around) the two
    wagons (shift + right click on objects you just
    unintentionally selected by this) or by holding shift down and
    clicking on every little object individually, then press s and
    change the size of all wagons. This way all wagons will get
    the same change in size and will so fit nicely to each other.
    <br>
    <br>
    The wheels of our wagons should also slightly touch our floor.
    By scaling them down they have probably moved themselves up a
    bit so press g and move everything down on the floor again.
    <br>
    <br>
    You can always press F12 to make a render and see if the train
    looks good.

    <A NAME="307lfindex3">&nbsp;</A>
<H2>The orange wagon with red and green cylinders</H2>

    The third wagon is easy as well: Again select the green wagon
    and its four wheels (click b and mark the objects (draw a
    rectangle around them), make sure that only the objects you
    wanted to select are really selected, otherwise unselect them
    by shift + right click), duplicate it (shift + d) and move it
    to the left of the dark blue wagon. Change the colour of the
    wagon to orange (right click on the cube to select it, then go
    to the material button, press "Add new" and change the colour
    sliders to R=1, G=0.647, B=0, don't forget to name your
    material "orange" then). Now in top view click with the
    red-white cursor in the middle of the right part of the wagon,
    then press Space--&gt;Add--&gt;Mesh--&gt;Cylinder, then tab to
    leave edit mode. Scale the cylinder down (press s) and then in front or
    side view place (press g) the cylinder on top of the wagon and
    scale the height up (press s again with holding the middle
    mouse button down to constrain the scaling) and give it a red
    colour (go to the material button and click the white button
    and then red.<br>
    The cylinder should now be in the middle of the right part of
    the wagon (you can see this e.g. in top and front view). Next
    you only need to duplicate it (shift +d), place it (press g) in
    the middle of the left part of the wagon and change the colour
    to green (go to the material button and choose "green" from the
    list of materials). <br>
    Now the third wagon is ready too! <br>


    <A NAME="307lfindex4">&nbsp;</A>
<H2>The red and green wagon</H2>

    For the forth one select all parts of the dark blue wagon,
    duplicate them (shift +d) and move them to the left. Select the
    dark blue cube (right click) and change the colour to green.
    Now in front view duplicate it and place it on top of the
    other. Change the colour to red. That's it already. <br>


    <A NAME="307lfindex5">&nbsp;</A>
<H2>The orange wagon</H2>

    The same for the next one: In top view select all parts of the
    dark blue wagon (right click on the blue wagon, then click b
    and mark the objects), duplicate them and move them to the
    left. Now select the dark blue cube (right click) in front view
    again and change its height and its colour (to orange). As the
    cube will move a bit downwards by scaling it up, move it a bit
    up. Here we go. <br>


    <A NAME="307lfindex6">&nbsp;</A>
<H2>The light blue wagon</H2>

    By now you should have some practice with moving, scaling,
    rotating and changing colours. So for the last wagon we will
    use a new technique. <br>
    <br>
    As you can see it is different from the others as it is open on
    top. To create it add a grid in top view (hit Space, then
    Add--&gt; Mesh--&gt; Grid). You are asked for Xres and Yres,
    choose 8 with both. Click tab twice and select the two outer
    lines of all four sides (click on b and mark the two lines on
    top, then click b again to mark the next two lines until you
    have selected all the two outer lines of the grid). <br>

    <center>
      <img src="../../common/images/article307/gridsmall.png"
      width="100" height="93" alt="[grid]" vspace="10" hspace=
      "10"><br>
      Fig.3 The grid with the two outer lines of all four sides
      selected
    </center>
    <br>
     Now in front view extrude the selected points by pressing e
    and moving the mouse upwards. By extruding you create
    three-dimensional geometry out of flat, two-dimensional shapes
    and it is a technique you will frequently use when you work in
    3D. <br>
    <br>
    The rest you should already know by now: Click tab to leave
    edit mode. Give it the right size (press s and scale it to make
    it fit to the other wagons) and a light blue colour (R=0
    G=0.714, B=1), add the four wheels by copying them ( shift +d)
    from another wagon and place them accordingly (press g).<br>
     <br>
    Finally you hit Space and then Add--&gt;Mesh--&gt;UVsphere
    (change both, the number of the segments and the rings back to
    32) to add the sphere. Press tab, scale the sphere down (press
    s), place the sphere inside the wagon (press g) and change the
    colour to pink (go to the material button, then click the white
    button and "Add new", then move the colour sliders to R=0.8,
    G=0 and B=1). Now go to the edit button (the button that looks
    like a square with yellow edges) and press "set smooth" (as you
    already did with the sphere in our previous article). The
    sphere will get a much smoother look (a smooth surface).<br>


    <A NAME="307lfindex7">&nbsp;</A>
<H2>The connection between the wagons</H2>

    Before modeling the locomotive let's first connect our
    wagons: Again add a grid (I chose 8 for the values of Xres and
    Yres again but you could also choose Xres=8 and Yres=2..) in
    top view to our scene, extrude it a little bit in front or
    side view by pressing e and moving the mouse, then press tab
    to leave edit mode and now in top view again resize it (press
    s). Its length should be from the center of one wagon to the
    center of the other with a little space between the two wagons
    and it shouldn't be larger than one-third of the width of the
    wagons (see Fig.4 and 5). Give it a material (R=0, G=1, B=1).
    Duplicate it (shift +d) and place it between all wagons (don't
    forget the one between the last wagon we modeled and the
    locomotive). <br>

    <center>
      <img src=
      "../../common/images/article307/toytrainconnectionsmall.png"
      width="400" height="286" alt="[grid]" vspace="10" hspace=
      "10"><br>
      Fig.4 The grid for the connection between the wagons
    </center>
    <br>
    <br>

    <center>
      <img src=
      "../../common/images/article307/connectionandwaggonsmall.png"
      width="400" height="286" alt="[grid]" vspace="10" hspace=
      "10"><br>
      Fig.5 A connection grid between a wagon
    </center>
    <br>


    <A NAME="307lfindex8">&nbsp;</A>
<H2>The locomotive</H2>

    <br>
     Now the locomotive shouldn't be too difficult either: Again
    add a grid (Xres and Yres being 8 again) to our scene in top
    view. Then extrude it (press e) in front view. Press tab twice
    and select (click on b, then mark with the mouse) only the
    right upper half of the locomotive (the four points on top and to
    the right). Extrude (press e) this part upwards again. Now give
    the whole object a yellow colour. <br>
    <br>
    The four upper points should still be selected, extrude (press
    e) them again (but only a little bit). The new upper points are
    selected now. Still having them selected press s while holding
    shift down and move the mouse away from the model to make this
    part bigger (see Fig.6). Now we have the outline. <br>

    <center>
      <img src="../../common/images/article307/locomotivesmall.png"
      width="400" height="296" alt="[outline of locomotive]"
      vspace="10" hspace="10"><br>
      Fig.6 The outline of our locomotive
    </center>
    <br>
    <br>
    <br>
    To give the roof of the locomotive the blue colour select the first
    line of points below them as well (at the moment only the top
    upper line is selected, to select the line below them as well
    press b and mark the line as always before). Then go to the
    edit buttons and press "new" under the box where the colour is
    displayed. Next press the "Select" box. Before pressing
    "Assign" go back to the material button again and click on the
    blue material. (Note that if you wanted to change the colour to
    one that doesn't already exist you first have to press "Add
    New" before you change the colour sliders to your chosen
    colour.) <br>

    <center>
      <img src="../../common/images/article307/assigncolour.jpg"
      width="94" height="98" alt="[assign colour]" vspace="10"
      hspace="10"><br>
       Fig.7 The buttons to assign more than one colour to one
      object
    </center>
    <br>
     The rest is "old stuff" again: Scale the locomotive to a size
    that it fits to the other wagons (press s), add the wheels
    like for all the other wagons and place the locomotive to the
    left of the other wagons. Then duplicate (shift +d) the red cylinder from the
    wagon with the two cylinders, resize it (press s) and place it
    in front of the locomotive. Duplicate and resize this again (it
    should have half the length of the other), move it to its place
    and you have successfully modeled your toy train! <br>
    <br>
    Here is a screen shot of the three different views in Blender:
    <br>

    <center>
      <img src=
      "../../common/images/article307/finalblendfilesmall.jpg"
      width="500" height="447" alt="[final blend file]" vspace="10"
      hspace="10"><br>
       Fig.8 Our train in the three different views
    </center>
    <br>

    <A NAME="307lfindex9">&nbsp;</A>
<H2>Finally</H2>

    Your toy train is ready now. But somehow if you render it
    (press F12) no shadows are displayed (even though you have
    pressed the Shadow button in the Display menu). Just select the
    spot light and press the "Only Shadow" button in the lamp
    button menu. Now give the spot light a higher energy level
    (e.g. a value of 5.0) and render your image again. There should
    be some shadows visible now. <br>
    <br>
    Time to admire your work! :) <br>
    <br>
     Here is our train:

    <center>
      <img src="../../common/images/article307/toytrainshadow.png"
      width="320" height="240" alt="[final toy train]" vspace="10"
      hspace="10"><br>
      Fig.9 Our train
    </center>
    <br>
     If you move the camera a bit up in side view and then rotate
    it so that it looks down on the train you get this:

    <center>
      <a href=
      "../../common/images/article307/toytrainfromabovebig.png"><img
       src="../../common/images/article307/toytrainfromabove.png"
      width="320" height="240" alt="[final toy train from above]"
      vspace="10" hspace="10"></a><br>
      Fig.9 Our train from above (click on the image to get it in
      big)
    </center>
    <br>
    <br>
     To save it as a .jpg image enter the directory and file name in the field
    with the default entry /render (left click, then type in the
    name) and also press the Extensions button. With this button
    pressed the picture is actually saved with the extension .jpg
    (or whatever format you choose) while otherwise the extension
    is not shown. Press the OSA button plus any of the numbers
    below (for quality), press the shadows button to see the shadow
    the train creates, change the End:250 field to End:1 (either
    make a left click and move the mouse to the left until the
    number has changed to 1 or hold shift down while left clicking
    in the field and then type in the value), choose the values of
    SizeX and SizeY depending on how big you want your image to be,
    choose Jpeg or any other format, press the RGB button and when
    you now hit the anim button your rendered image is finally
    saved. <br>
    <br>
    Don't forget to save your train as a .blend file as well (go to
    the menu --&gt; Save as --&gt; type toytrain.blend (or however
    you want to name it)--&gt;Save file) so that we can reuse it
    again next time! <br>
    <br>
     Have fun and happy blending:) <br>
     <br>


    <A NAME="307lfindex10">&nbsp;</A>
<H2>References</H2>


    <ul>
      <li>The Official Blender site (here you get the latest
      information about the further development of Blender, you can
      download it, there are tutorials ..): <a href=
      "http://www.blender.org">http://www.blender.org</a><br>
      <br>
      </li>

      <li>Blender cafe (in English and French):<br>
      <a href=
      "http://www.linuxgraphic.org/section3d/blender/pages/index-ang.php">
      http://www.linuxgraphic.org/section3d/blender/pages/index-ang.php</a><br>

      <br>
      </li>

      <li>General articles about 3D graphics and animation: <a
      href=
      "http://webreference.com/3d/">http://webreference.com/3d/</a><br>

      <br>
      </li>
    </ul>
    <!-- vim: set sw=2 ts=2 et: -->
  



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