<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <title>GRASS Tutorial for nviz</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>Animation Panel</h2> <p>Using the <strong>Animation</strong> panel, you can create a simple fly-through animation.</p> <BR><BR> <DL><DD> <img src="nvimg/panel/anim.gif" alt="Animation Panel" width="308" height="298"> </DD></DL> <BR><BR> <h3>OPTIONS</h3> <dl> <dt><img src="nvimg/panel/anim1.gif" alt="Step Back" width="16" height="16"> (Reverse)</dt> <dd>Moves backward through the animation one frame at a time. <br><br></dd> <dt><img src="nvimg/panel/anim5.gif" alt="Stop" width="16" height="16"> (Stop)</dt> <dd>Stops the animation. <br><br></dd> <dt> <img src="nvimg/panel/anim3.gif" alt="Step Forward" width="16" height="16"> (Forward)</dt> <dd>Moves forward through the animation one frame at a time. <br><br></dd> <dt><img src="nvimg/panel/anim4.gif" alt="Play" width="16" height="16"> (Play)</dt> <dd>Plays the animation. <br><br></dd> <dt> <strong>Tot. Frames</strong></dt> <dd>Sets the total number of frames in the animation. <br><br></dd> <dt> <strong>Key Frames</strong></dt> <dd>On the <strong>Animation</strong> panel, use the <strong>Key Frames</strong> slider to display and select key frame positions. Each vertical black line represents a frame in the animation. A thick vertical blue line marks the current position (frame) in the animation. An inverted blue triangle marks each key frame above the frame markers. Click at any point in the frame markers (black lines) to move the current position. Click and drag the key frame markers (blue triangle) to a new position. <br><br></dd> <dt> <strong>Add</strong></dt> <dd>Adds a key frame at the current position (frame number) marked by the thick vertical blue line. <br><br></dd> <dt> <strong>Clear All</strong></dt> <dd>Deletes all key frames. <br><br></dd> <dt> <strong>Show</strong></dt> <dd>Use the next three options to annotate the animation. <br><br></dd> <dd> <dl> <dt> <strong>Path</strong></dt> <dd>Shows the path that the animation follows between key frames (if selected). This is useful for adjusting the tension if using a spline interpolation. <br><br></dd> <dt> <strong>Vect</strong></dt> <dd>Draws all loaded vector maps in the animation (if selected). <br><br></dd> <dt> <strong>Sites</strong></dt> <dd>Draws all loaded sites files in the animation (if selected). <br><br></dd> </dl> </dd> <dt> <strong>Interp.</strong></dt> <dd>Sets the interpolation used between key frames. <br><br></dd> <dd> <dl> <dt> <strong>Linear</strong></dt> <dd>Uses a linear interpolation between key frames. <br><br></dd> <dt> <strong>Spline</strong></dt> <dd>Uses a spline interpolation between key frames at the selected tension. <br><br></dd> <dt> <strong>Tension</strong></dt> <dd>Sets the tension of the spline interpolation. <br><br></dd> </dl> </dd> <dt> <strong>Run and Save</strong></dt> <dd>Runs the animation and saves each frame as an image. You must supply a file name prefix, and set the image and draw type. The image file name includes the file prefix, frame number and image type. For example, frame number 12 with a file prefix of FLY saved as a PPM would be named FLY0012.ppm. <br><br></dd> <dt><strong>Close</strong></dt> <dd>Closes the <strong>Animation</strong> panel.<br><br></dd> </dl> </body> </html>
