<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <meta name="Description" content="Structure of OpenTTD (OTTD) landscape arrays #2"> <title>OpenTTD Landscape Internals - #2</title> <style type="text/css"> span.abuse { font-family: "Courier New", Courier, mono; background-color: rgb(255, 58, 31); } span.option{ font-family: "Courier New", Courier, mono; background-color: rgb(255,255, 30); } span.free { font-family: "Courier New", Courier, mono; background-color: rgb(30, 178, 54); } span.used { font-family: "Courier New", Courier, mono; } td.bits { white-space: nowrap; text-align: center; font-family: "Courier New", Courier, mono; } td.caption { white-space: nowrap; text-align: left; } td li { white-space: nowrap; text-align: left; } th { white-space: nowrap; text-align: center; } </style> </head> <body style="direction: ltr;"> <h3 style="font-weight: bold;">Landscape</h3> <span style="font-weight: bold;"></span>Six attributes hold the information about a tile. This can be seen in the <a href="landscape.html">Landscape</a> document. This page tries to give an overview of used and free bits of the array so you can quickly see what is used and what is not. <ul> <li><span style="font-weight: bold;"><span class="free">O</span></span> - bit is free</li> <li><span style="font-weight: bold;"><span class="used">X</span></span> - bit is used</li> <li><span style="font-weight: bold;"><span class="abuse"> </span></span> - bit of attribute is abused for different purposes, i.e. other bits define the actual meaning.</li> <li><span style="font-weight: bold;"><span class="option">~</span></span> - bit is accessed, but does not really have a meaning (e.g. owner of clear land is always OWNER_NONE)</li> </ul> <p> <ul> <li><span style="font-weight: bold;">type_height</span> - 8 bits in size, stores tile height (lower 4 bits) and tile class (upper 4 bits)</li> <li><span style="font-weight: bold;">m1</span> - 8 bits in size, used to identify the owner of that tile (eg piece of rail, bridge, etc.)</li> <li><span style="font-weight: bold;">m2</span> - 16 bits in size, used to identify the index of the given tile (object) in the (object-)array</li> <li><span style="font-weight: bold;">m3</span> - 8 bits in size, is used for general storage</li> <li><span style="font-weight: bold;">m4</span> - 8 bits in size, is used for general storage</li> <li><span style="font-weight: bold;">m5</span> - 8 bits in size, is used for general storage</li> <li><span style="font-weight: bold;">m6</span> - 8 bits in size, special meaning : lower 2 bits only valid in tropic climate, upper 2 bits for bridges</li> <li><span style="font-weight: bold;">m7</span> - 8 bits in size, is used for general storage</li> </ul> <table align=center border="1" cellpadding="2" cellspacing="2"> <tbody> <tr> <th colspan=2>class</th> <th>type_height (8)</th> <th>m1 (8)</th> <th>m2 (16)</th> <th>m3 (8)</th> <th>m4 (8)</th> <th>m5 (8)</th> <th>m6 (8)</th> <th>m7 (8)</th> </tr> <tr> <td colspan=2 class="caption">bits</td> <td class="bits">7654 3210</td> <td class="bits">7654 3210</td> <td class="bits">FEDC BA98 7654 3210</td> <td class="bits">7654 3210</td> <td class="bits">7654 3210</td> <td class="bits">7654 3210</td> <td class="bits">7654 3210</td> <td class="bits">7654 3210</td> </tr> <tr> <td rowspan="2">0</td> <td class="caption">ground</td> <td class="bits">XXXX XXXX</td> <td class="bits"><span class="free">OOO</span><span class="option">~ ~~~~</span></td> <td class="bits"><span class="free">OOOO OOOO OOOO OOOO</span></td> <td class="bits"><span class="free">OOO</span>X <span class="free">OOOO</span></td> <td class="bits">XXXX XX<span class="free">OO</span></td> <td class="bits">XXXX XXXX</td> <td class="bits">XX<span class="free">OO OO</span>XX</td> <td class="bits"><span class="free">OOOO OOOO</span></td> </tr> <tr> <td class="caption">farmland</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits">XXXX XXXX XXXX XXXX</td> <td class="bits"><span class="free">OOO</span>X XXXX</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits">XX<span class="free">OO OO</span>XX</td> <td class="bits"><span class="free">OOOO OOOO</span></td> </tr> <tr> <td rowspan=3>1</td> <td class="caption">rail</td> <td class="bits">XXXX XXXX</td> <td class="bits"><span class="free">OOO</span>X XXXX</td> <td class="bits"><span class="free">OOOO</span> XXXX <span class="free">OOOO OOOO</span></td> <td class="bits"><span class="free">OOOO</span> XXXX</td> <td class="bits"><span class="free">OOOO</span> XXXX</td> <td class="bits">XXXX XXXX</td> <td class="bits">XX<span class="free">OO OO</span>XX</td> <td class="bits"><span class="free">OOOO OOOO</span></td> </tr> <tr> <td class="caption">rail with signals</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits"><span class="free">OOOO</span> XXXX XXXX XXXX</td> <td class="bits">XXXX XXXX</td> <td class="bits">XXXX XXXX</td> <td class="bits">-inherit-</td> <td class="bits">XX<span class="free">OO OO</span>XX</td> <td class="bits"><span class="free">OOOO OOOO</span></td> </tr> <tr> <td class="caption">depot</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits">XXXX XXXX XXXX XXXX</td> <td class="bits"><span class="free">OOOO</span> XXXX</td> <td class="bits"><span class="free">OOOO</span> XXXX</td> <td class="bits">XX<span class="free">O</span>X <span class="free">O</span>XXX</td> <td class="bits">XX<span class="free">OO OO</span>XX</td> <td class="bits"><span class="free">OOOO OOOO</span></td> </tr> <tr> <td rowspan=3>2</td> <td class="caption">road</td> <td class="bits">XXXX XXXX</td> <td class="bits"><span class="free">OOO</span>X XXXX</td> <td class="bits">XXXX XXXX XXXX XXXX</td> <td class="bits">XXXX XXXX</td> <td class="bits"><span class="free">OOOO OOOO</span></td> <td class="bits">XXXX XXXX</td> <td class="bits">XXXX X<span class="free">O</span>XX</td> <td class="bits">XXX<span class="free">O</span> XXXX</td> </tr> <tr> <td class="caption">level crossing</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits">XXXX XXXX</td> <td class="bits">-inherit-</td> <td class="bits">XXXX<span class="free"> OOO</span>X</td> <td class="bits">XXXX X<span class="free">O</span>XX</td> <td class="bits">XXXX XXXX</td> </tr> <tr> <td class="caption">road depot</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits"><span class="free">OOOO OOOO</span></td> <td class="bits"><span class="free">OOOO OOOO</span></td> <td class="bits">XX<span class="free">OO OO</span>XX</td> <td class="bits">XX<span class="free">OO OO</span>XX</td> <td class="bits">XXX<span class="free">O OOOO</span></td> </tr> <tr> <td>3</td> <td class="caption">house</td> <td class="bits">XXXX XXXX</td> <td class="bits">XXXX XXXX</td> <td class="bits">XXXX XXXX XXXX XXXX</td> <td class="bits">XX<span class="free">O</span><span class="option">~ ~~</span>XX</td> <td class="bits">XXXX XXXX</td> <td class="bits">XXX<span class="abuse">X XXXX</span></td> <td class="bits"><span class="abuse">XXXX XX</span>XX</td> <td class="bits">XXXX <span class="abuse">XXXX</span></td> </tr> <tr> <td>4</td> <td class="caption">trees</td> <td class="bits">XXXX XXXX</td> <td class="bits"><span class="free">OOO</span><span class="option">~ ~~~~</span></td> <td class="bits"><span class="free">OOOO OOO</span>X XXXX XXXX</td> <td class="bits"><span class="option">~~</span>XX XXXX</td> <td class="bits">XXXX XX<span class="free">OO</span></td> <td class="bits">XX<span class="free">OO O</span>XXX</td> <td class="bits"><span class="free">OOOO OO</span>XX</td> <td class="bits"><span class="free">OOOO OOOO</span></td> </tr> <tr> <td rowspan=7>5</td> <td class="caption">rail station</td> <td class="bits">XXXX XXXX</td> <td class="bits"><span class="free">O</span>XXX XXXX</td> <td class="bits">XXXX XXXX XXXX XXXX</td> <td class="bits">XXXX XXXX</td> <td class="bits">XXXX XXXX</td> <td class="bits">XXXX XXXX</td> <td class="bits"><span class="free">OO</span>XX XXXX</td> <td class="bits">XXXX XXXX</td> </tr> <tr> <td class="caption">rail waypoint</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> </tr> <tr> <td class="caption">road stop</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits">XXXX <span class="free">OOOO</span></td> <td class="bits"><span class="free">OOOO OOOO</span></td> <td class="bits"><span class="option">~~~~ ~</span>XXX</td> <td class="bits"><span class="free">OO</span>XX XXXX</td> <td class="bits">XX<span class="free">O</span>X XXXX</td> </tr> <tr> <td class="caption">dock</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits"><span class="free">OOOO OOOO</span></td> <td class="bits"><span class="free">OOOO OOOO</span></td> <td class="bits"><span class="option">~~~~ ~</span>XXX</td> <td class="bits"><span class="free">OO</span>XX X<span class="free">O</span>XX</td> <td class="bits"><span class="free">OOOO OOOO</span></td> </tr> <tr> <td class="caption">airport</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits">XXXX <span class="free">OOOO</span></td> <td class="bits"><span class="free">OOOO OOOO</span></td> <td class="bits">XXXX XXXX</td> <td class="bits"><span class="free">OO</span>XX X<span class="free">O</span>XX</td> <td class="bits">XXXX XXXX</td> </tr> <tr> <td class="caption">buoy</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits"><span class="free">OOOO OOOO</span></td> <td class="bits"><span class="free">OOOO OOOO</span></td> <td class="bits"><span class="option">~~~~ ~~~~</span></td> <td class="bits"><span class="free">OO</span>XX X<span class="free">O</span>XX</td> <td class="bits"><span class="free">OOOO OOOO</span></td> </tr> <tr> <td class="caption">oilrig</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits"><span class="free">OOOO OOOO</span></td> <td class="bits"><span class="free">OOOO OOOO</span></td> <td class="bits"><span class="option">~~~~ ~~~~</span></td> <td class="bits"><span class="free">OO</span>XX X<span class="free">O</span>XX</td> <td class="bits"><span class="free">OOOO OOOO</span></td> </tr> <tr> <td rowspan=3>6</td> <td class="caption">sea, shore</td> <td class="bits">XXXX XXXX</td> <td class="bits"><span class="free">O</span>XXX XXXX</td> <td class="bits"><span class="free">OOOO OOOO OOOO OOOO</span></td> <td class="bits"><span class="free">OOOO OOOO</span></td> <td class="bits"><span class="free">OOOO OOOO</span></td> <td class="bits">X<span class="option">~~</span>X XXXX</td> <td class="bits">XX<span class="free">OO OO</span>XX</td> <td class="bits"><span class="free">OOOO OOOO</span></td> </tr> <tr> <td class="caption">canal, river</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits"><span class="free">OOOO OOOO OOOO OOOO</span></td> <td class="bits"><span class="free">OOOO OOOO</span></td> <td class="bits">XXXX XXXX</td> <td class="bits">-inherit-</td> <td class="bits">XX<span class="free">OO OO</span>XX</td> <td class="bits"><span class="free">OOOO OOOO</span></td> </tr> <tr> <td class="caption">shipdepot</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits">XXXX XXXX XXXX XXXX</td> <td class="bits"><span class="free">OOOO OOOO</span></td> <td class="bits"><span class="free">OOOO OOOO</span></td> <td class="bits">-inherit-</td> <td class="bits">XX<span class="free">OO OO</span>XX</td> <td class="bits"><span class="free">OOOO OOOO</span></td> </tr> <tr> <td>8</td> <td class="caption">industry</td> <td class="bits">XXXX XXXX</td> <td class="bits">XXX<span class="free">O</span> <span class="abuse">XXXX</span></td> <td class="bits">XXXX XXXX XXXX XXXX</td> <td class="bits">XXXX XXXX</td> <td class="bits">XXXX XXXX</td> <td class="bits">XXXX XXXX</td> <td class="bits"><span class="free">OO</span>XX XXXX</td> <td class="bits">XXXX XXXX</td> </tr> <tr> <td rowspan=2>9</td> <td class="caption">tunnel entrance</td> <td class="bits">XXXX XXXX</td> <td class="bits"><span class="free">OOO</span>X XXXX</td> <td class="bits"><span class="free">OOOO OOOO OOOO OOOO</span></td> <td class="bits">XXXX XXXX</td> <td class="bits"><span class="free">OOOO OOOO</span></td> <td class="bits">X<span class="free">OO</span>X XXXX</td> <td class="bits">XX<span class="free">OO OO</span>XX</td> <td class="bits">XXXX X<span class="free">O</span>XX</td> </tr> <tr> <td>bridge ramp</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits">-inherit-</td> <td class="bits">XXXX XXXX</td> <td class="bits">-inherit-</td> </tr> <tr> <td rowspan=2>A</td> <td class="caption">objects</td> <td class="bits">XXXX XXXX</td> <td class="bits"><span class="free">O</span>XXX XXXX</td> <td class="bits">XXXX XXXX XXXX XXXX</td> <td class="bits">XXXX XXXX</td> <td class="bits"><span class="free">OOOO OOOO</span></td> <td class="bits">XXXX XXXX</td> <td class="bits">XX<span class="free">OO OO</span>XX</td> <td class="bits">XXXX XXXX</td> </tr> </tbody> </table> </body> </html>