<desc>X coordinate, relative to the object center</desc>
</param>
<param>
<type>int</type>
<name>y</name>
<desc>Y coordinate, relative to the object center</desc>
</param>
</params>
</syntax>
<desc>Adds a new vertex to an object.</desc>
<remark>Notice: with any vertex updated caused by stretching or rotation of the object (e.g. building or growth) the vertices will be reset to their original defined position unless a special vertex mode is selected.</remark>