<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <title>NVIZ Manual</title> <link rel="stylesheet" href="grassdocs.css" type="text/css"> </head> <body bgcolor="#FFFFFF" link="#0000DF" vlink="#006000"> <img src="grass_logo.png"><hr align=center size=6 noshade> <h1>NVIZ Reference Manual</h1> <hr width="100%" align=center size=4 noshade> <p> <a href="nviz_toc.html">CONTENTS</a> </p> <h2>Movement Panel</h2> <p>The <strong>Movement</strong> panel always appears at the top of the <strong>Controls</strong> window. You use the <strong>Movement</strong> panel to set the position, direction, and perspective of the view. As you change movement options, a low resolution or wire grid of the surface redraws (<strong><em>fast display mode</em></strong>) showing the results of your changes.</p> <BR><BR> <DL><DD> <img src="nvimg/panel/main.gif" alt = "Movement Panel" width="302" height="323"> </DD></DL> <BR><BR> <h3>OPTIONS</h3> <dl> <dt> <strong>Auto: Clear</strong></dt> <dd>Clears the screen before drawing the surfaces (if selected).<br><br></dd> <dt> <strong>Auto: Draw</strong></dt> <dd>Redraws the scene each time the view changes (if selected).<br><br></dd> <dt> <strong>Feature: Surface</strong></dt> <dd>Draws all loaded surfaces (if selected).<br><br></dd> <dt> <strong>Feature: Vectors</strong></dt> <dd>Draws all loaded vectors (if selected).<br><br></dd> <dt> <strong>Feature: Sites</strong></dt> <dd>Draws all loaded sites files (if selected).<br><br></dd> <dt> <strong>Draw</strong></dt> <dd>Draws selected files using the current viewing and lighting options. <br><br></dd> <dt> <strong>Clear</strong></dt> <dd>Clears the screen to the background color.<br><br></dd> <dt> <strong>Cancel</strong></dt> <dd>Cancels the drawing in progress.<br><br></dd> <dt> <strong>View: eye</strong></dt> <dd>Sets the position box (directly below) to control the eye position of the view. The view center remains unchanged.<br><br></dd> <dt> <strong>View: center</strong></dt> <dd>Sets the position box (directly below) to control the view center position. The eye position remains unchanged.<br><br></dd> <dt> <strong>Position Box</strong></dt> <dd>If the <strong><em>eye</em></strong> view is selected, the position box shows a puck with a direction arrow pointing to the center. The direction arrow indicates the look direction (azimuth). You click and drag the puck to change the current eye position. The box annotations are <strong><em>N</em></strong>orth, <strong><em>S</em></strong>outh, <strong><em>E</em></strong>ast, and <strong><em>W</em></strong>est. <br><br> If the <strong><em>center</em></strong> view is selected, the position box shows as a cross hair. You click and drag the cross hair to change the current center of view.<br><br></dd> <dt> <strong>Height</strong></dt> <dd> Adjusts the viewer's height above the scene.<br><br></dd> <dt> <strong>zexag</strong></dt> <dd> Adjusts the vertical exaggeration of the surface. As an example, if the easting and northing are in meters and the elevation in feet, a vertical exaggeration of .305 would produce a true (unexaggerated) surface. <br><br></dd> <dt> <strong>Look here</strong></dt> <dd> Allows you to select a point on the surface that becomes the new center of view. <br><br></dd> <dt> <strong>Look center</strong></dt> <dd>Resets the view to the original default center of view. <br><br></dd> <dt> <strong>Look top</strong></dt> <dd>Sets the viewer directly over the scene's center position. This <strong><em>top</em></strong> view orients approximately north south. <br><br></dd> <dt> <strong>Look cancel</strong></dt> <dd> Allows you to move over the surface with no center of view. <br><br></dd> <dt> <strong>perspective</strong></dt> <dd> Adjusts the viewer's angle of view.<br><br></dd> <dt> <strong>twist</strong></dt> <dd> Rotates the scene about the horizontal axis. An angle of 0 is flat. The scene rotates between -90 and 90 degrees.<br><br></dd> <dt> <strong>RESET</strong></dt> <dd>Returns all current settings to their startup values.<br><br></dd> </dl> </body> </html>
