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Add map bit to suppress water flooding checks

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Set if all neighbour tiles are also water
This reduces the overhead of flood checks on large maps
This commit is contained in:
Jonathan G Rennison
2021-02-21 21:11:35 +00:00
parent 0df3e785cb
commit f595696e97
6 changed files with 42 additions and 2 deletions
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1
docs/landscape.html
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@@ -1054,6 +1054,7 @@
<li>m1 bits 6..5 : Water class (sea, canal or river)
<li>m1 bits 4..0: <a href="#OwnershipInfo">owner</a> (for sea, rivers, and coasts normally <tt>11</tt>)</li>
<li>m2: Depot index (for depots only)</li>
<li style="color: blue">m3 bit 0: No flooding state, set if all neighbouring tiles are also water</li>
<li>m4: Random data for canal or river tiles</li>
<li>m5: tile type:
<table>

2
docs/landscape_grid.html
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@@ -241,7 +241,7 @@ the array so you can quickly see what is used and what is not.
<td class="caption">sea, shore</td>
<td class="bits" rowspan=4><span class="used" title="Ship docking tile status">X</span> <span class="used" title="Water class">XX</span> <span class="used" title="Owner">XXXXX</span></td>
<td class="bits" rowspan=3><span class="free">OOOO OOOO OOOO OOOO</span></td>
<td class="bits" rowspan=4><span class="free">OOOO OOOO</span></td>
<td class="bits" rowspan=4><span class="free">OOOO OOO</span><span class="patch" title="No flooding state">P</span></td>
<td class="bits"><span class="free">OOOO OOOO</span></td>
<td class="bits"><span class="used" title="Water tile type: coast, clear, lock, depot">O<span class="usable">OO</span>O</span> <span class="free">OOO</span><span class="used" title="Sea shore flag">X</span></td>
<td class="bits" rowspan=4><span class="free">OOOO OOOO</span></td>