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| author | rubidium <rubidium@openttd.org> | 2010-08-27 10:42:48 +0000 |
|---|---|---|
| committer | rubidium <rubidium@openttd.org> | 2010-08-27 10:42:48 +0000 |
| commit | 8047d84aa04a65bb4c63fe44f8b01e1979246689 (patch) | |
| tree | 2c41ad7d94460a8e13043a4ce09f2de281b4db92 /docs/landscape.html | |
| parent | 30f2afac9bf023bce081e52e09b1c0a152d9849a (diff) | |
| download | openttd-8047d84aa04a65bb4c63fe44f8b01e1979246689.tar.xz | |
(svn r20633) -Cleanup: and clarify some bits in the landscape documentation and make them pass the validator again.
Diffstat (limited to 'docs/landscape.html')
| -rw-r--r-- | docs/landscape.html | 113 |
1 files changed, 70 insertions, 43 deletions
diff --git a/docs/landscape.html b/docs/landscape.html index af35fb0bc..a01988810 100644 --- a/docs/landscape.html +++ b/docs/landscape.html @@ -4,64 +4,90 @@ <head> <meta name="Author" content="Marcin Grzegorczyk"> <meta name="Description" content="Structure of OpenTTD (OTTD) landscape arrays"> - <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> + <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>OpenTTD Landscape Internals</title> </head> <body> <h3><a name="Landscape">Landscape</a></h3> + <p> + For a graphical representation of the tile-layout have a look at + <a href="landscape_grid.html">Landscape grid</a> page. + </p> <p>Eight attributes (counting "<span style="font-weight: bold;">type_height</span>") hold the informations about a tile.<BR> These attributes are referred to as - "<span style="font-weight: bold;">type_height</span>", - "<span style="font-weight: bold;">m1</span>", "<span style="font-weight: bold;">m2</span>", - "<span style="font-weight: bold;">m3</span>", "<span style="font-weight: bold;">m4</span>", - "<span style="font-weight: bold;">m5</span>", "<span style="font-weight: bold;">m6</span>" - and "<span style="font-weight: bold;">m7</span>".<BR> + "<span style="font-weight: bold;">type_height</span>", + "<span style="font-weight: bold;">m1</span>", "<span style="font-weight: bold;">m2</span>", + "<span style="font-weight: bold;">m3</span>", "<span style="font-weight: bold;">m4</span>", + "<span style="font-weight: bold;">m5</span>", "<span style="font-weight: bold;">m6</span>" + and "<span style="font-weight: bold;">m7</span>".<br> The most important value is the class of a tile, stored in the upper 4 bits of the <span style="font-weight: bold;">type_height</span> attribute. The lower 4 bits are used to encode the height and slope data. </p> - Special Attribute : <span style="font-weight: bold;">m6</span>. There are 4 bits of it that are used accross multiple tile classes<br> + Frequently repeating patterns: <ul> - <li> - <a name = "bridge_direction"> - Bits 7..6 : - <table border="1"> - <tr bgcolor="#CCCCCC"><td colspan="2">Presence and direction of bridge above,<br>for tiles that support this.</td></tr> - <tr><td><tt>00</tt> </td><td>no bridge</td></tr> - <tr><td><tt>01</tt> </td><td>Axis X (North-East)</td></tr> - <tr><td><tt>02</tt> </td><td>Axis Y (South-West)</td></tr> - </table> + <li><span style="font-weight: bold;">m1</span> + <ul> + <li> + <a name="WaterClass"></a> + Bits 6..5: + <table border="1" style="width: 30em;"> + <tr bgcolor="#CCCCCC"><td colspan="2">The type of water that is on a tile. + <tr><td style="width: 5em;"><tt>00</tt></td><td align=left>Sea</td></tr> + <tr><td><tt>01</tt></td><td align=left>Canal</td></tr> + <tr><td><tt>02</tt></td><td align=left>River</td></tr> + <tr><td><tt>03</tt></td><td align=left>Invalid, i.e. no water on this tile</td></tr> + </table> + Some tiles, such as houses, reuse these bits of other purposes. + </li> + <li> + <a name="OwnershipInfo"></a> + Bits 4..0: + <table border="1" style="width: 30em;"> + <tr bgcolor="#CCCCCC"><td colspan="2">The owner of a tile can be either companies (human or AI) or "Game entities". + <tr><td style="width: 5em;"><tt>00..0E</tt></td><td align=left>Normal companies</td></tr> + <tr><td><tt>0F</tt></td><td align=left>a town owns the tile</td></tr> + <tr><td><tt>10</tt></td><td align=left>nobody owns the tile</td></tr> + <tr><td><tt>11</tt></td><td align=left>"water" owns the tile</td></tr> + <tr><td><tt>FF</tt></td><td align=left>spectator in MP or in scenario editor</td></tr> + </table> + Some tiles, such as houses and industries, reuse these bits of other purposes. + </li> + </ul> + </li> + <li><span style="font-weight: bold;">m6</span> + <ul> + <li> + <a name="bridge_direction"></a> + Bits 7..6: + <table border="1" style="width: 30em;"> + <tr bgcolor="#CCCCCC"><td colspan="2">Presence and direction of bridge above, for tiles that support this.</td></tr> + <tr><td style="width: 5em;"><tt>00</tt></td><td>no bridge</td></tr> + <tr><td><tt>01</tt></td><td>Axis X (North-East)</td></tr> + <tr><td><tt>02</tt></td><td>Axis Y (South-West)</td></tr> + </table> + Some tiles, such as houses do not support bridges over them and use these bits for other purposes. + </li> + <li> + <a name="tropic_zone"></a> + Bits 1..0: + <table border="1" style="width: 30em;"> + <tr bgcolor="#CCCCCC"><td colspan="2">Only meaningfull in tropic climate. It contains the definition of the available zones</td></tr> + <tr><td style="width: 5em;"><tt>00</tt></td><td>normal</td></tr> + <tr><td><tt>01</tt></td><td>desert</td></tr> + <tr><td><tt>02</tt></td><td>rain forest</td></tr> + </table> + In any other climate these 2 bits are theoretically free of use, however using them does not seem useful. + </li> + </ul> </li> - <li> - <a name = "tropic_zone"> - Bits 1..0 : - <table border="1"> - <tr bgcolor="#CCCCCC"><td colspan="2">Only meaningfull in tropic climate.<br>It contains the definition of the available zones</td></tr> - <tr><td><tt>00</tt> </td><td>normal</td></tr> - <tr><td><tt>01</tt> </td><td>desert</td></tr> - <tr><td><tt>02</tt> </td><td>rain forest</td></tr> - </table> - In any other climate, those 2 bits are free of use. + <li><span style="font-weight: bold;">m7:</span><br> + Animation frame/state. Used for houses, industries, objects and stations. </li> </ul> - <p> - For a graphical representation of the tile-layout have a look at - <a href="landscape_grid.html">Landscape grid</a> page. - </p> - - The <a name="OwnershipInfo">owner of a tile</a>, as frequently associated with attribute m1 bits 4..0, - can be either companies (human or AI) or "Game entities". - They are identified using: - <table border="1"> - <tr><td><tt>00..0E</tt> </td><td align=left>Normal companies</td></tr> - <tr><td><tt>0F</tt> </td><td align=left>a town owns the tile</td></tr> - <tr><td><tt>10</tt> </td><td align=left>nobody owns the tile</td></tr> - <tr><td><tt>11</tt> </td><td align=left>"water" owns the tile</td></tr> - <tr><td><tt>FF</tt> </td><td align=left>spectator in MP or in scenario editor</td></tr> - </table> <p>OTTD's class-specific periodic tile processing routine is called once every +256 ticks for each tile.</p> @@ -708,7 +734,7 @@ </ul> </li> </ul> - <small><a name="newhouses">Newhouses is the name englobing a newGRF feature developped by TTDPatch devs (mainly Csaboka).<br> + <small><a name="newhouses"></a>Newhouses is the name englobing a newGRF feature developped by TTDPatch devs (mainly Csaboka).<br> It allows the replacement of the properties as well as the graphics of houses in the game.<br> To distinguish between the standard behaviour and the newGRF one, HouseID (m4 + m3[6]) is tested for anything above 110.<br> 110 is the count of standard houses. So above 110 means there is a new definition of at least one house</small> @@ -1525,6 +1551,7 @@ <td><tt>2</tt> </td> <td>water</td> </tr> + </table> </li> <li>m5 bits 1..0: direction onto the bridge / out of the tunnel <table> @@ -1569,7 +1596,6 @@ <li>m1 bits 6..5 : Water class (sea, canal, river or land) <li>m1 bits 4..0: <a href="#OwnershipInfo">owner</a> of the object (for lighthouses and transmitters normally <tt>10</tt>)</li> <li>m2: index into the array of objects - <li>m3: animation counter <li>m5: tile type: <table> <tr> @@ -1600,6 +1626,7 @@ </li> <li>m6 bits 7..6 : Possibility of a bridge above, in the <a href="#bridge_direction">direction specified</a></li> <li>m6 bits 1..0 : <a href="#tropic_zone">Tropic zone definition</a></li> + <li>m7: animation counter </ul> </td> </tr> |