<!DOCTYPE html
  PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<!--
Copyright (c) 2006 UGS Corp.

All Rights Reserved.

This software and related documentation are proprietary to UGS Corp.
-->
<html>
   <head>
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      <title>Z-Axis, X-Point</title>
      <script language="javaScript">
        abridged="false";
        displayConditions=new Array();
      </script>
      <link type="text/css" href="../css/main_styles.css" rel="stylesheet">
   </head>
   <body class="bodydocs" onload="top.pageLoader()" bgcolor="#FFFFFF">
      <div class="title_topic4" id="xps10_pagetitle">Z-Axis, X-Point</div>
      <hr noshade="true">
      <p class="para_topic"> You can define a coordinate system by selecting a point and a line. The line defines the Z axis of the coordinate system. The positive direction of the Z axis is towards the line end point selected.</p>
      <p class="para_topic"> The X axis is aligned with a line passing through the specified point and perpendicular to the Z axis. The positive X direction is from the Z axis toward the specified point. The Y axis is then determined by the conventional right-hand rule. The origin of the coordinate system is at the intersection of the axes.</p>
      <p align="center"><img align="bottom" src="graphics/vie_subfunat68.gif"></p>
      <p class="para_topic"> A Line and a Point Define a Coordinate System</p>
      <p class="para_topic"> First, select a line to define the Z axis of the coordinate system. Then, using the Point Constructor, define a point that does not lie on the line selected. The system then exits the CSYS Constructor.  </p>
   </body>
</html>