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Island.xml
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Island.xml
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<sequence values="UWBRGEYINSOTus" origin="True">
<prl in="***/*U*/***" out="***/*Y*/***"/>
<one in="WY" out="WW" steps="1" comment="draw an island skeleton"/>
<one in="YWY/YYY" out="YWY/YWY" steps="400" comment="steps define the lenght of the backbone"/>
<one in="YWY/YWY/YYY" out="YWY/YRY/YYY" />
<one in="YYY/WWW" out="YWY/WWW" steps="20" comment="adjust steps to change number of branches. More branches = rounder, smoother island with less inner water"/>
<one in="YWY/YYY" out="YWY/YWY" steps="2300" comment="adjust steps for the length of branches. More lenght = bigger island"/>
<all in="R" out="W" />
<prl in="Y" out="U" p="0.00003" steps="1" comment="adjust p to reduce lakes"/>
<one comment="Voronoi">
<rule in="WY" out="WW"/>
<rule in="UY" out="UU"/>
</one>
<convolution neighborhood="Moore" comment="smoothing">
<rule in="U" out="W" sum="5..8" values="W"/>
<rule in="W" out="U" sum="5..8" values="U"/>
</convolution>
<all in="U/*" out="I/*" symmetry="(x)" comment="paint ocean to find out coasts. Sea will be U, lakes I, deep ocean B"/>
<all in="UI" out="UU"/>
<all in="WU" out="WR"/>
<prl in="RU" out="RR" steps="30" p="0.5" comment="steps = size of the shallow water around the coast"/>
<prl in="U" out="B"/>
<prl in="R" out="U"/>
<all in="UW" out="UG" comment="spawn a few river sources (paint coast green on some thickness to force sources to be inland)"/>
<all in="GW" out="GG" steps="80" comment="increase steps to push sources back from the sea"/>
<prl in="WW" out="WI" p="0.000015" steps="1" comment="play with p to change the number of sources"/>
<all in="G" out="W"/>
<sequence>
<one in="IW" out="IR" steps="1">
<field for="R" from="U" on="W"/>
</one>
<one>
<rule in="RU" out="NU"/>
<rule in="RO" out="NO"/>
<rule in="NNNRW/WWWWW" out="NNWWW/WWNNR" comment="break long, straight lines" />
<rule in="RW" out="NR" />
<observe value="W" to="WN"/>
<observe value="R" to="N"/>
</one>
<all in="N" out="O" comment="color done (O) so that we can merge rivers"/>
<all in="OI" out="OO" />
</sequence>
<prl steps="2" p="0.8" comment="widen the connection with the sea">
<rule in="UO/UW" out="UO/UO" />
<rule in="UO/WW" out="UO/OO" />
</prl>
<convolution neighborhood="Moore" periodic="True" comment="smooth">
<rule in="W" out="O" sum="6..8" values="O"/>
</convolution>
<prl in="WU" out="YU" steps="1" p="0.005" comment="generate beaches starting points"/>
<all steps="30" comment="march them along the coast">
<rule in="UU/YW" out="UU/YY" />
<rule in="UW/YW" out="UY/YY" />
</all>
<prl in="WY" out="YY" steps="3" p="0.4" comment="widen them with a bit of randomness"/>
<convolution neighborhood="Moore" periodic="True" comment="smooth them">
<rule in="Y" out="W" sum="5..8" values="W"/>
<rule in="W" out="Y" sum="5..8" values="Y"/>
</convolution>
<all in="O" out="u" comment="lakes and rivers back to lake blue"/>
<all in="UY" out="TY" />
<all in="UW" out="TW" />
<all in="uW" out="TW" />
<convolution neighborhood="Moore" periodic="True">
<rule in="U" out="T" sum="5..8" values="T"/>
<rule in="u" out="T" sum="5..8" values="T"/>
</convolution>
<prl in="UTW" out="UTG" p="0.1" steps="1" comment="seed forests and plains"/>
<prl in="YW" out="YG" p="1" steps="1" />
<prl in="WTW" out="WTE" p="0.05" steps="1" />
<prl in="W" out="G" p="0.00001" steps="1" />
<one comment="grow them, forest 3x stronger">
<rule in="WE" out="EE" />
<rule in="WE" out="EE" />
<rule in="WE" out="EE" />
<rule in="WG" out="GG" />
</one>
<convolution neighborhood="Moore" periodic="True">
<rule in="G" out="E" sum="5..8" values="E"/>
<rule in="E" out="G" sum="6..8" values="O"/>
</convolution>
<all in="W" out="G" comment="if any white, it's grass (islands). TODO: Eliminate islands next to lakes or islands too small"/>
<all in="B" out="I" comment="change deep ocean color"/>
<convolution neighborhood="Moore" periodic="True">
<rule in="U" out="I" sum="5..8" values="I"/>
<rule in="I" out="U" sum="5..8" values="U"/>
</convolution>
<all in="GE" out="GR" comment="let's grow mountains"/>
<all in="TE" out="TR" />
<prl in="E" out="S" p="0.0001" steps="1" />
<one>
<rule in="RE" out="RR" />
<rule in="SE" out="SS" />
<rule in="SE" out="SS" />
</one>
<all in="R" out="E" />
<convolution neighborhood="Moore" periodic="True">
<rule in="E" out="S" sum="5..8" values="S"/>
<rule in="S" out="E" sum="5..8" values="E"/>
</convolution>
<all in="ES" out="ER" />
<prl in="S" out="s" p="0.0002" steps="1" />
<one>
<rule in="RS" out="RR" />
<rule in="RS" out="RR" />
<rule in="RS" out="RR" />
<rule in="sS" out="ss" />
<rule in="sS" out="ss" />
<rule in="sS" out="ss" />
<rule in="sS" out="ss" />
</one>
<all in="R" out="S" />
<convolution neighborhood="Moore" periodic="True">
<rule in="S" out="s" sum="5..8" values="s"/>
<rule in="s" out="S" sum="5..8" values="S"/>
</convolution>
<sequence comment="final step, trace back rivers to mountains">
<one in="EEE/ETE" out="EEE/ERE" steps="1" />
<one>
<rule in="RS" out="NS" />
<rule in="RO" out="NO" />
<rule in="NNNRE/EEEEE" out="NNEEE/EENNR" comment="break long, straight lines" />
<rule in="RE" out="NR" />
<observe value="E" to="EN"/>
<observe value="R" to="N"/>
</one>
<one in="NS" out="RN" steps="5" />
<all in="R" out="T" />
<all in="N" out="T" />
</sequence>
<prl in="u" out="U"/>
</sequence>
<!--
Made by Guillaume Fiette https://github.com/woldendans/MJ-simple-island
-->