public void setOffset(Vector2f offset) {
        this.offset = offset;
    }
Sets the value for the current offset amount to use when building texture
coordinates. Note that this does <b>NOT </b> rebuild the terrain at all.
This is mostly used for outside constructors of terrain patches.

@param offset
           The new texture offset.
jme3-terrain/src/main/java/com/jme3/terrain/geomipmap/TerrainPatch.java