<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<!DOCTYPE funcs
  SYSTEM '../../../clonk.dtd'>
<?xml-stylesheet type="text/xsl" href="../../../clonk.xsl"?>
<funcs>
  <func>
    <title>ExtractLiquid</title>
    <category>Landscape</category>
    <subcat>Material</subcat>
    <version>5.1 OC</version>
    <syntax>
      <rtype>int</rtype>
      <params>
        <param>
          <type>int</type>
          <name>x</name>
          <desc>X position at which material is extracted. Offset in local calls.</desc>
          <optional />
        </param>
        <param>
          <type>int</type>
          <name>y</name>
          <desc>Y position at which material is extracted. Offset in local calls.</desc>
          <optional />
        </param>
      </params>
    </syntax>
    <desc>Sucks up one pixel of liquid at the specified position. Return value is the material number of the material actually extracted, or -1 if no liquid was there.</desc>
    <examples>
      <example>
        <code>var mat=ExtractLiquid();
if (mat!=-1) <funclink>InsertMaterial</funclink>(mat,0,-100)</code>
        <text>Sucks up one pixel of liquid and reinserts it 100 pixel further above.</text>
      </example>
    </examples>
    <related>
      <funclink>ExtractMaterialAmount</funclink>
      <funclink>InsertMaterial</funclink>
      <funclink>GBackLiquid</funclink>
    </related>
  </func>
  <author>Sven2</author><date>2001-11</date>
</funcs>
