1 <!doctype HTML public "-//W3C//DTD HTML 4.0 Frameset//EN">
\r
6 <title>Stream Lines presentation</title>
\r
7 <meta http-equiv="content-type" content="text/html; charset=windows-1252">
\r
8 <meta name="generator" content="RoboHelp by eHelp Corporation www.ehelp.com">
\r
9 <link rel="stylesheet" href="../default_ns.css"><script type="text/javascript" language="JavaScript" title="WebHelpSplitCss">
\r
11 if (navigator.appName !="Netscape")
\r
12 { document.write("<link rel='stylesheet' href='../default.css'>");}
\r
15 <style type="text/css">
\r
17 h1.whs1 { text-align:justify; }
\r
18 p.whs2 { text-align:justify; }
\r
19 img_whs3 { border:none; width:30px; height:30px; float:none; border-style:none; }
\r
20 p.whs4 { text-indent:48px; text-align:justify; }
\r
21 p.whs5 { margin-left:0px; text-indent:48px; text-align:justify; }
\r
22 p.whs6 { margin-left:40px; text-align:justify; }
\r
23 p.whs7 { font-style:italic; color:#ff0000; margin-left:40px; text-align:justify; }
\r
24 img_whs8 { border:none; width:26px; height:25px; float:none; border-style:none; }
\r
25 p.whs9 { margin-left:40px; text-align:justify; color:#000000; }
\r
26 img_whs10 { border:none; width:348px; height:533px; float:none; border-style:none; }
\r
27 p.whs11 { text-align:justify; margin-left:0px; }
\r
28 ul.whs12 { list-style:disc; }
\r
29 p.whs13 { margin-left:36px; text-align:justify; }
\r
30 p.whs14 { text-align:justify; margin-left:36px; }
\r
31 p.whs15 { font-weight:bold; text-align:justify; margin-left:36px; }
\r
32 img_whs16 { border:none; border-style:none; width:816px; height:681px; float:none; }
\r
33 p.whs17 { margin-left:0px; text-align:justify; }
\r
35 </style><script type="text/javascript" language="JavaScript">
\r
37 if ((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) == 4))
\r
39 var strNSS = "<style type='text/css'>";
\r
40 strNSS += "p.whs5 {margin-left:1pt; }";
\r
41 strNSS += "p.whs11 {margin-left:1pt; }";
\r
42 strNSS += "p.whs17 {margin-left:1pt; }";
\r
43 strNSS +="</style>";
\r
44 document.write(strNSS);
\r
48 <script type="text/javascript" language="JavaScript" title="BSSC Special Effects" src="../ehlpdhtm.js"></script><script type="text/javascript" language="JavaScript" title="WebHelpInlineScript">
\r
51 if (innerWidth != origWidth || innerHeight != origHeight)
\r
54 if ((parseInt(navigator.appVersion) == 4) && (navigator.appName == "Netscape")) {
\r
55 origWidth = innerWidth;
\r
56 origHeight = innerHeight;
\r
62 <style type="text/css">
\r
64 div.WebHelpPopupMenu { position:absolute; left:0px; top:0px; z-index:4; visibility:hidden; }
\r
65 p.WebHelpNavBar { text-align:right; }
\r
67 </style><script type="text/javascript" language="javascript1.2" src="../whmsg.js"></script>
\r
68 <script type="text/javascript" language="javascript" src="../whver.js"></script>
\r
69 <script type="text/javascript" language="javascript1.2" src="../whproxy.js"></script>
\r
70 <script type="text/javascript" language="javascript1.2" src="../whutils.js"></script>
\r
71 <script type="text/javascript" language="javascript1.2" src="../whtopic.js"></script>
\r
72 <script type="text/javascript" language="javascript1.2">
\r
74 if (window.gbWhTopic)
\r
76 if (window.setRelStartPage)
\r
78 addTocInfo("Post-Pro module\n3D presentations\nField presentations\nStream Lines presentation");
\r
79 addButton("show",BTN_IMG,"Show","","","","",0,0,"../whd_show0.gif","../whd_show2.gif","../whd_show1.gif");
\r
80 addButton("hide",BTN_IMG,"Hide","","","","",0,0,"../whd_hide0.gif","../whd_hide2.gif","../whd_hide1.gif");
\r
85 if (window.setRelStartPage)
\r
87 setRelStartPage("../index.htm");
\r
97 document.location.reload();
\r
101 <body><script type="text/javascript" language="javascript1.2">
\r
103 if (window.writeIntopicBar)
\r
104 writeIntopicBar(4);
\r
107 <h1 class="whs1">Stream Lines presentation</h1>
\r
109 <p class="whs2"><span style="font-weight: bold;"><B><img src="../i_blue.jpg" x-maintain-ratio="TRUE" width="30px" height="30px" border="0" class="img_whs3">Stream Lines </B></span>is a type of presentation transforming
\r
110 the cells with vectors having most similar direction into lines . A streamline
\r
111 can be thought of as the path that a massless particle takes in a vector
\r
112 field. Streamlines are used to convey the structure of a vector field.
\r
113 Usually streamlines are created to explore the most interesting features
\r
116 <p class="whs4">Creating streamlines
\r
117 requires specifying multiple parameters including <span style="font-weight: bold;"><B>starting
\r
118 points</B></span> of streamlines, <span style="font-weight: bold;"><B>direction</B></span>
\r
119 and other parameters to control the <span style="font-weight: bold;"><B>propagation</B></span>
\r
120 of the streamlines.</p>
\r
122 <p class="whs4"> In
\r
123 <span style="font-weight: bold;"><B>Post-Pro</B></span> there is an option allowing
\r
124 to specify <span style="font-weight: bold;"><B>one particular area</B></span>
\r
125 of the field on which the <span style="font-weight: bold;"><B>Stream Lines</B></span>
\r
126 presentation will be created. This option has been created for optimization
\r
127 purposes: sometimes generation of a Stream Lines presentation based on
\r
128 all points of a very complicated field is very time-consuming and requires
\r
129 a lot of hardware resources. </p>
\r
131 <p class="whs5">To bound the area on which the Stream
\r
132 Lines presentation will be created. you can use another field presentation.
\r
133 The points of the field located on this source presentation will serve
\r
134 as starting points for generated streamlines. </p>
\r
136 <p class="whs6"> </p>
\r
139 style="text-align: justify; color: #000000;"><span class=expandtext
\r
140 style="color: #000000;"><font color=black >To
\r
141 create a Stream Lines presentation:</font></span></p>
\r
143 <p class="whs7"> </p>
\r
145 <p class="whs6">- Right-click on one
\r
146 of the time stamps of the field in the Object browser and from the pop-up
\r
147 menu choose <span style="font-weight: bold;"><B>Stream Lines, </B></span>or</p>
\r
149 <p class="whs6">- Click on one of the
\r
150 time stamps of the field in the Object browser and select from the main
\r
151 menu <span style="font-weight: bold;"><B>Visualization > Stream Lines</B></span>,
\r
152 or click <img src="../pics/streamlinesicon.jpg" x-maintain-ratio="TRUE" width="26px" height="25px" border="0" class="img_whs8"> icon<span style="font-weight: bold;"> <B></B></span>in
\r
153 the <span style="font-weight: bold;"><B>Visualization Toolbar.</B></span></p>
\r
155 <p class="whs6"> </p>
\r
157 <p class="whs9"><span class=expandtext
\r
158 style="color: #000000;"><font color=black ><img src="../pics/streamlines.png" x-maintain-ratio="TRUE" width="348px" height="533px" border="0" class="img_whs10"></font></span></p>
\r
160 <p class="whs9"> </p>
\r
162 <p class="whs11"><span style="font-weight: bold;"><B>Stream
\r
163 Lines </B></span><span>tab allows you to set additional parameters of your
\r
164 Stream Lines presentation:</span></p>
\r
166 <p class="whs6"> </p>
\r
168 <ul type="disc" class="whs12">
\r
170 <li class=kadov-p><p class="whs13"><span
\r
171 style="font-weight: bold;"><B>Source</B></span>: This set of fields allows to
\r
172 define a source presentation on the basis of which your <span style="font-weight: bold;"><B>Stream
\r
173 Lines </B></span>presentation will be generated. If in the <span style="font-weight: bold;"><B>Source
\r
174 type </B></span>choose box you have chosen <span style="font-weight: bold;"><B>None</B></span>,
\r
175 your Stream Lines presentation will be generated on all points of the
\r
176 field. You can also choose <span style="font-weight: bold;"><B>Entity, Family,
\r
177 Group </B></span>or <span style="font-weight: bold;"><B>Presentation. </B></span>You
\r
178 can also specify the source presentation (from the list of already created
\r
179 field presentations). The points of the field located on this source presentation
\r
180 will serve as starting points for generated streamlines. </p></li>
\r
182 <li class=kadov-p><p class="whs14">In
\r
183 the <span style="font-weight: bold;"><B>Used points</B></span> field you can
\r
184 set the number of these starting points (from 0 to 100%).</p></li>
\r
186 <li class=kadov-p><p class="whs14"><span
\r
187 style="font-weight: bold;"><B>Step Length</B></span>: this parameter defines
\r
188 the size of the output line segments that make up the streamline (which
\r
189 is represented as a polyline). </p></li>
\r
191 <li class=kadov-p><p class="whs14"><span
\r
192 style="font-weight: bold;"><B>Integration Step </B></span>field: parameter of
\r
193 smoothness of the stream lines. This parameter defines the accuracy of
\r
194 construction of the streamlines. A smaller value of this parameter allows
\r
195 to construct smoother streamlines (at the cost of more computation time).</p></li>
\r
197 <li class=kadov-p><p class="whs14"><span
\r
198 style="font-weight: bold;"><B>Propagation Time </B></span>field: this parameter
\r
199 controls the maximum length of the stream line (measured in units of time)</p></li>
\r
201 <li class=kadov-p><p class="whs15">Direction <span style="font-weight: normal;">choose
\r
202 box: this option allows to select direction of the stream lines.(Forward,
\r
203 Backward or Both)</span></p></li>
\r
205 <li class=kadov-p><p class="whs14"><span
\r
206 style="font-weight: bold;"><B>Magnitude coloring</B></span> check box: this option
\r
207 allows to color your presentation according the vector values applied
\r
208 to the cells of the mesh or to display it using only one color (this color
\r
209 can be selected if you click <span style="font-weight: bold;"><B>Use Color
\r
210 </B></span>button).</p></li>
\r
213 <p class="whs2"> </p>
\r
215 <p><span style="font-weight: bold;"><B>Scalar Bar </B></span>tab allows to define
\r
216 the parameters of the scalar bar displayed with this presentation (<a href="scalar_map_presentation.htm#Scalar Bar">see also</a>).</p>
\r
220 <p class="whs2"><span style="font-family: 'Times New Roman', serif;">After
\r
221 you have finished with setting these parameters, click <span style="font-weight: bold;"><B>OK.
\r
222 </B></span>Your presentation with scalar bar will be immediately displayed
\r
223 in the viewer: </span></p>
\r
225 <p class="whs2"> </p>
\r
227 <p class="whs6"> <img src="../pics/streamlinesprsnt.png" x-maintain-ratio="TRUE" width="816px" height="681px" border="0" class="img_whs16"></p>
\r
229 <p class="whs17"> </p>
\r
231 <p class="whs17"> </p>
\r
234 <a href="javascript:void(0);" onClick="var e; if (parseInt(navigator.appVersion)>=4){e=event;} if (parseInt(navigator.appVersion) >=2 && typeof(PickupDialog_Invoke) == 'function') PickupDialog_Invoke(e,'','Creating field presentations','creating_field_presentations.htm');return false;" title="Related Topics"><img src="../ss_btn_related_topics.gif" border=0 height=17 width=82 alt="Related Topics"></a>
\r
239 <p class="whs17"> </p>
\r
241 <p class="whs17"> </p>
\r
243 <script type="text/javascript" language="JavaScript" title="WebHelpRelatedTopics"><!--
\r
244 if (parseInt(navigator.appVersion) >= 3 && typeof (WritePopupMenuLayer) == "function")
\r
245 WritePopupMenuLayer();
\r
246 //--></script><script type="text/javascript" language="javascript1.2">
\r
248 if (window.writeIntopicBar)
\r
249 writeIntopicBar(0);
\r