L-arbor

<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0> <table cellpadding=0 cellspacing=0 border=0 height="100%"><tr> <td valign="top" width=150 BGCOLOR="#444444" TEXT="#080000"> <div> <TABLE BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="126" BORDERCOLORLIGHT="#C0C0C0" BORDERCOLORDARK="#808080" FRAME="BOX" RULES="ALL" ALIGN="LEFT" HSPACE="0" VSPACE="0" BGCOLOR=#444444 > <tR> <tD VALIGN=TOP COLSPAN=3 BGCOLOR=#444444 HEIGHT= 134 WIDTH="130"> <IMG SRC="09096860.jpg" border=0 width="150" height="134" ALIGN="LEFT" HSPACE="0" VSPACE="0"> </tD> </tR> <tR> <tD VALIGN=TOP BGCOLOR=#000000 HEIGHT= 92 WIDTH="19"> <IMG SRC="09213600.jpg" border=0 width="19" height="96" ALIGN="LEFT" HSPACE="0" VSPACE="0"> </tD> <tD VALIGN=CENTER ROWSPAN=2 BGCOLOR=#000000 WIDTH="88"><div> <A HREF="id19.htm" TARGET="_top" TITLE="Projects"><U>Up</U></A></div> <div> <A HREF="id31.htm" TARGET="_top" TITLE="Monolith"><U>Monolith</U></A></div> <div> L-arbor</div> <div> <A HREF="id35.htm" TARGET="_top" TITLE="ClothSim"><U>ClothSim</U></A></div> <div> <A HREF="id36.htm" TARGET="_top" TITLE="Mobile Guide"><U>Mobile Guide</U></A></div> <div> <A HREF="id16.htm" TARGET="_top" TITLE="Particle System"><U>Particle System</U></A></div> <IMG SRC="1x1.gif" border=0 width="94" height="1" ALIGN="LEFT" HSPACE="0" VSPACE="0"> </tD> <tD VALIGN=TOP WIDTH="19"> <IMG SRC="0a125600.jpg" border=0 width="37" height="96" ALIGN="LEFT" HSPACE="0" VSPACE="0"> </tD> </tR> <tR> <tD VALIGN=TOP BGCOLOR=#000000 HEIGHT= 50 WIDTH="19"> <IMG SRC="09213600.jpg" border=0 width="19" height="96" ALIGN="LEFT" HSPACE="0" VSPACE="0"> </tD> <tD VALIGN=TOP WIDTH="19"> <IMG SRC="0a125600.jpg" border=0 width="37" height="96" ALIGN="LEFT" HSPACE="0" VSPACE="0"> </tD> </tR> <tR> <tD VALIGN=TOP COLSPAN=3 HEIGHT= 45 WIDTH="130"> <IMG SRC="0a2962d0.jpg" border=0 width="150" height="45" ALIGN="LEFT" HSPACE="0" VSPACE="0"> </tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 45 WIDTH="19"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="45" ALIGN="bottom" WIDTH="19" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="88"><div> <A HREF="id31.htm" TARGET="_top" TITLE="Monolith"><U><IMG SRC="0bb0e0e0.gif" border=0 width="14" height="14" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></U></A> <A HREF="id35.htm" TARGET="_top" TITLE="ClothSim"><U><IMG SRC="0bc0e0e0.gif" border=0 width="14" height="14" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></U></A> <A HREF="id19.htm" TARGET="_top" TITLE="Projects"><U><IMG SRC="0bf0e0e0.gif" border=0 width="14" height="14" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></U></A></div> </tD> <tD VALIGN=TOP WIDTH="19"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="45" ALIGN="bottom" WIDTH="19" HSPACE="0" VSPACE="0"></tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 45 WIDTH="19"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="45" ALIGN="bottom" WIDTH="19" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="88"><div> <A HREF="mailto:grubertm@hotmail.com" TARGET="_top" TITLE="mailto:grubertm@hotmail.com"><U>Comments or questions ? </U></A></div> <div> <A HREF="mailto:grubertm@hotmail.com" TARGET="_top" TITLE="mailto:grubertm@hotmail.com"><U>Contact me !</U></A></div> </tD> <tD VALIGN=TOP WIDTH="19"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="45" ALIGN="bottom" WIDTH="19" HSPACE="0" VSPACE="0"></tD> </tR> </TABLE></div> <bR> </td> <td valign="top" BGCOLOR="#444444" TEXT="#080000"> <div> <TABLE BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="402" BORDERCOLORLIGHT="#C0C0C0" BORDERCOLORDARK="#808080" FRAME="BOX" RULES="ALL" ALIGN="BOTTOM" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=TOP COLSPAN=3 HEIGHT= 22 WIDTH="406"> <IMG SRC="09596160.jpg" border=0 width="406" height="22" ALIGN="LEFT" HSPACE="0" VSPACE="0"> </tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 40 WIDTH="112"> <IMG SRC="09d70280.jpg" border=0 width="112" height="40" ALIGN="LEFT" HSPACE="0" VSPACE="0"> </tD> <tD VALIGN=CENTER BGCOLOR=#000000 WIDTH="151"><div> <B>L-arbor</B></div> <IMG SRC="1x1.gif" WIDTH="155" HEIGHT="1"> </tD> <tD VALIGN=TOP WIDTH="139"> <IMG SRC="09c8b280.jpg" border=0 width="139" height="40" ALIGN="LEFT" HSPACE="0" VSPACE="0"> </tD> </tR> <tR> <tD VALIGN=TOP COLSPAN=3 HEIGHT= 28 WIDTH="406"> <IMG SRC="098941c0.jpg" border=0 width="404" height="28" ALIGN="LEFT" HSPACE="0" VSPACE="0"> </tD> </tR> </TABLE></div> <div> <I><B>What is L-arbor ?</B></I></div> <div> First of all it is the implementation of my Master´s Thesis "<I><B>Graphical specification of advanced differential Lindenmayer-systems</B></I>". If you know the meaning of the words in this catchy title you can already guess what it is all about. If not, here´s an explanation:</div> <bR> <div> <B><IMG BORDER="0" SRC="Symb075c00b700f0f0caa600.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Lindenmayer-Systems</B> (L-Systems)  are formal grammars, consisting of a starting symbol (Axiom) a number of additional symbols and rules for derivation (replacement) of a string of symbols from another string of symbols. Some symbols have a geometrical interpretation (line, box, sphere, rotation, translation, etc.). According to the rules old symbols are continuously replaced by new ones. Surprisingly enough this mechanism allows for a good simulation of natural plant growth (where old cells die and are replaced by new ones).</div> <div> <B><IMG BORDER="0" SRC="Symb075c00b700f0f0caa600.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Differential</B> : most L-System applications currently available assume time to consist of discrete events so that at a given point of time all symbols have either been replaced or have not changed at all- there is no continuity as can be observed in the real world. When used in animations this results in new plant parts suddenly appearing or disappearing. L-arbor instead can be used in a differential mode where arbitrary points of time can be selected and the size of plant parts is interpolated allowing for smooth animations.</div> <div> <B><IMG BORDER="0" SRC="Symb075c00b700f0f0caa600.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Graphical Specification</B> : the flip side of the power that is inherent in L-Systems is their lack of an easily understandable notation. Rules use all kinds of syntactical sugar to implement the various features. This makes it even harder to comprehend the meaning of a standard L-System file. To counter this L-arbor introduces a graphical editor to quickly construct rules without having to enter a single line of code. This makes it easy for beginners to quickly achieve results. For advanced L-System designers it is of course possible to manually type in the rule and use all advanced features.</div> <div> <B><IMG BORDER="0" SRC="Symb075c00b700f0f0caa600.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Advanced</B> : This refers to advanced features not found in earlier implementations. </div> <div> <IMG BORDER="0" SRC="Symb075c00b700f0f0caa600.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Definition of a bounding volume to allow plants to grow within a specific region. This makes it easy to create different topiary plants from a single specification. </div> <div> <IMG BORDER="0" SRC="Symb075c00b700f0f0caa600.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">For advanced modelling you can also specify Query Modules to retrieve information about the exact position / orientation of plant parts- use this for phototropism or to simulate environment factors such as humidity, soil quality, etc. </div> <div> <IMG BORDER="0" SRC="Symb075c00b700f0f0caa600.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Since L-arbor internally uses a graph (DAG) to store the plant topology this prevents some ambiguities that can occur when character strings are used to represent context-sensitive replacements.</div> <bR> <DIV ALIGN="LEFT"></DIV> <div> <IMG SRC="0f50a340.jpg" border=0 width="522" height="308" ALIGN="BOTTOM" HSPACE="2" VSPACE="2"></div> <bR> <div> <I><B>Additional features</B></I></div> <div> Some more technical details on L-arbor :</div> <div> <IMG BORDER="0" SRC="Symb075c00b700f0f0caa600.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">L-arbor runs under Windows 95 SP1, Windows 98, Windows ME, Windows NT4 SP3 or Windows 2000 </div> <div> <IMG BORDER="0" SRC="Symb075c00b700f0f0caa600.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Graphical presentation uses OpenGL. Thus a 3D accelerator card is highly recommended !</div> <div> <IMG BORDER="0" SRC="Symb075c00b700f0f0caa600.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">3D Primitives: Line, Box, Cylinder, Sphere, Torus, Cone, NURBS. Shaded and/or textured.</div> <div> <IMG BORDER="0" SRC="Symb075c00b700f0f0caa600.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Level-of-Detail implementation: Choose between high qualitiy or high speed rendering</div> <div> <IMG BORDER="0" SRC="Symb075c00b700f0f0caa600.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Data input using an ergonomic GUI </div> <div> <IMG BORDER="0" SRC="Symb075c00b700f0f0caa600.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Graphics output as .BMP, .JPG, .PNG, .TIF or animated .AVI</div> <div> <IMG BORDER="0" SRC="Symb075c00b700f0f0caa600.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">3D data output as raw .PLG or Renderman (.RIB) file</div> <div> <IMG BORDER="0" SRC="Symb075c00b700f0f0caa600.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Each symbol has built-in parameters (length, diameter, etc.) and 2 user-configurable ones</div> <bR> <DIV ALIGN="LEFT"></DIV> <div> <IMG SRC="0f729520.jpg" border=0 width="553" height="338" ALIGN="BOTTOM" HSPACE="2" VSPACE="2"></div> <bR> <div> <B><U>Downloads</U></B></div> <div> <TABLE BORDER="0" CELLPADDING="2" CELLSPACING="1" WIDTH="545" BORDERCOLORLIGHT="#C0C0C0" BORDERCOLORDARK="#808080" FRAME="BOX" RULES="ALL" ALIGN="BOTTOM" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=CENTER HEIGHT= 38 WIDTH="35"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="38" ALIGN="bottom" WIDTH="35" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=CENTER><NOBR><div> <IMG SRC="05620200.gif" border=0 width="32" height="32" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </NOBR></tD> <tD VALIGN=CENTER WIDTH="459"><div> <A HREF="http://www.geocities.com/grubertm/files/larbor1aeng.zip" TARGET="_top" TITLE="http://www.geocities.com/grubertm/files/"><U>L-arbor v1.0</U></A> (2,45 MB) (ENGLISH) </div> </tD> </tR> <tR> <tD VALIGN=CENTER HEIGHT= 38 WIDTH="35"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="38" ALIGN="bottom" WIDTH="35" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=CENTER><NOBR><div> <IMG SRC="05620200.gif" border=0 width="32" height="32" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </NOBR></tD> <tD VALIGN=CENTER WIDTH="459"><div> <A HREF="http://www.geocities.com/grubertm/files/larbor1ager.zip" TARGET="_top" TITLE="http://www.geocities.com/grubertm/files/"><U>L-arbor v1.0</U></A> (2,33 MB) (GERMAN) </div> </tD> </tR> <tR> <tD VALIGN=CENTER HEIGHT= 37 WIDTH="35"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="37" ALIGN="bottom" WIDTH="35" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=CENTER><NOBR><div> <IMG SRC="0481c1f0.gif" border=0 width="28" height="31" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </NOBR></tD> <tD VALIGN=CENTER><NOBR><div> <A HREF="http://www.geocities.com/grubertm/files/plantsim.pdf" TARGET="_top" TITLE="http://www.geocities.com/grubertm/files/"><U>Simulating plant growth (using L-Systems)</U></A> (ENGLISH)  (320 kB) <IMG SRC="05928190.gif" border=0 width="40" height="25" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </NOBR></tD> </tR> <tR> <tD VALIGN=CENTER HEIGHT= 37 WIDTH="35"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="37" ALIGN="bottom" WIDTH="35" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=CENTER><NOBR><div> <IMG SRC="0481c1f0.gif" border=0 width="28" height="31" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </NOBR></tD> <tD VALIGN=CENTER><NOBR><div> <A HREF="http://www.geocities.com/grubertm/files/installation.pdf" TARGET="_top" TITLE="http://www.geocities.com/grubertm/files/"><U>Quick start manual L-arbor v1.0</U></A> (ENGLISH) (462 kB) </div> </NOBR></tD> </tR> <tR> <tD VALIGN=CENTER HEIGHT= 37 WIDTH="35"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="37" ALIGN="bottom" WIDTH="35" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=CENTER><NOBR><div> <IMG SRC="0481c1f0.gif" border=0 width="28" height="31" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </NOBR></tD> <tD VALIGN=CENTER><NOBR><div> <A HREF="http://members.sitegadgets.com/scripts/download.cgi?username=grubertm&dl=11 " TARGET="_top" TITLE="http://members.sitegadgets.com/scripts/d"><U>Master´s Thesis on L-arbor / Documentation</U></A> (GERMAN) (2,5 MB)</div> </NOBR></tD> </tR> <tR> <tD VALIGN=CENTER HEIGHT= 49 WIDTH="35"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="49" ALIGN="bottom" WIDTH="35" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=CENTER><NOBR><div> <IMG SRC="0481c1f0.gif" border=0 width="28" height="31" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </NOBR></tD> <tD VALIGN=CENTER WIDTH="459"><div> <A HREF="http://www.geocities.com/grubertm/files/vrmltree.pdf" TARGET="_top" TITLE="http://www.geocities.com/grubertm/files/"><U>VRML-Tree Dokumentation</U></A> (GERMAN) (789 kB)</div> <div> VRML Tree was the first incarnation of L-arbor. It uses a Netscape-compatible VRML browser to visualize plant growth</div> </tD> </tR> </TABLE></div> <bR> </td> </tr></table></body>