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99 <h1 class="whs1">Stream Lines presentation</h1>
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101 <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
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102 the cells with vectors having most similar direction into lines . A streamline
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103 can be thought of as the path that a massless particle takes in a vector
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104 field. Streamlines are used to convey the structure of a vector field.
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105 Usually streamlines are created to explore the most interesting features
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108 <p class="whs4">Creating streamlines
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109 requires specifying multiple parameters including <span style="font-weight: bold;"><B>starting
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110 points</B></span> of streamlines, <span style="font-weight: bold;"><B>direction</B></span>
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111 and other parameters to control the <span style="font-weight: bold;"><B>propagation</B></span>
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112 of the streamlines.</p>
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114 <p class="whs4"> In
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115 <span style="font-weight: bold;"><B>Post-Pro</B></span> there is an option allowing
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116 to specify <span style="font-weight: bold;"><B>one particular area</B></span>
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117 of the field on which the <span style="font-weight: bold;"><B>Stream Lines</B></span>
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118 presentation will be created. This option has been created for optimization
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119 purposes: sometimes generation of a Stream Lines presentation based on
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120 all points of a very complicated field is very time-consuming and requires
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121 a lot of hardware resources. </p>
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123 <p class="whs5">To bound the area on which the Stream
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124 Lines presentation will be created. you can use another field presentation.
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125 The points of the field located on this source presentation will serve
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126 as starting points for generated streamlines. </p>
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128 <p class="whs6"> </p>
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131 style="text-align: justify; color: #000000;"><span class=expandtext
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132 style="color: #000000;"><font color=black ><img src="../pics/streamlines.png" x-maintain-ratio="TRUE" width="348px" height="533px" align="left" border="0" class="img_whs7">To create a Stream Lines presentation:</font></span></p>
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134 <p class="whs8"> </p>
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136 <p class="whs6">- Right-click on one
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137 of the time stamps of the field in the Object browser and from the pop-up
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138 menu choose <span style="font-weight: bold;"><B>Stream Lines, </B></span>or</p>
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140 <p class="whs6">- Click on one of the
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141 time stamps of the field in the Object browser and select from the main
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142 menu <span style="font-weight: bold;"><B>Visualization > Stream Lines</B></span>,
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143 or click <img src="../pics/streamlinesicon.jpg" x-maintain-ratio="TRUE" width="26px" height="25px" border="0" class="img_whs9"> icon<span style="font-weight: bold;"> <B></B></span>in
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144 the <span style="font-weight: bold;"><B>Visualization Toolbar.</B></span></p>
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146 <p class="whs6"> </p>
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148 <ul type="disc" class="whs10">
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150 <li class=kadov-p><p class="whs11"><span
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151 style="font-weight: bold;"><B>Stream Lines </B></span><span>tab allows you to
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152 set additional parameters of your Stream Lines presentation:</span></p></li>
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155 <p class="whs6"> </p>
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157 <ul type="disc" class="whs10">
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159 <li class=kadov-p><p class="whs12"><span
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160 style="font-weight: bold;"><B>Source</B></span>: This set of fields allows to
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161 define a source presentation on the basis of which your <span style="font-weight: bold;"><B>Stream
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162 Lines </B></span><span>presentation will be generated. </span><span style="margin-left: 40px; text-align: justify;">If
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163 in the </span><span style="margin-left: 40px;
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164 text-align: justify;
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165 font-weight: bold;"><B>Source type </B></span><span
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166 style="margin-left: 40px; text-align: justify;">choose box you have chosen
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167 </span><span style="margin-left: 40px;
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168 text-align: justify;
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169 font-weight: bold;"><B>None</B></span><span style="margin-left: 40px; text-align: justify;">,
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170 your Stream Lines presentation will be generated on </span><span style="margin-left: 40px;
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171 text-align: justify;
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172 font-weight: bold;"><B>all</B></span><span style="margin-left: 40px; text-align: justify;">
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173 points of the field. You can also choose </span><span style="margin-left: 40px;
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174 text-align: justify;
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175 font-weight: bold;"><B>Entity, Family, Group</B></span><span style="margin-left: 40px; text-align: justify;">
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176 or </span><span style="margin-left: 40px;
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177 text-align: justify;
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178 font-weight: bold;"><B>Presentation. </B></span><span
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179 style="margin-left: 40px; text-align: justify;">You can also specify the
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180 source presentation (from the list of already created field presentations).
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181 The points of the field located on this source presentation will serve
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182 as starting points for generated streamlines. </span></p></li>
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184 <li class=kadov-p><p class="whs12">In
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185 the <span style="font-weight: bold;"><B>Used points</B></span> field you can
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186 set the number of these starting points (from 0 to 100%).</p></li>
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189 <p class="whs6"> </p>
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191 <p class="whs6">- <span style="font-weight: bold;"><B>Step
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192 Length </B></span>field: this parameter defines the size of the output line
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193 segments that make up the streamline (which is represented as a polyline).
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196 <p class="whs6"> </p>
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198 <p class="whs6">- <span style="font-weight: bold;"><B>Integration
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199 Step </B></span>field: parameter of smoothness of the stream lines. This parameter
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200 defines the accuracy of construction of the streamlines. A smaller value
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201 of this parameter allows to construct smoother streamlines (at the cost
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202 of more computation time).</p>
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204 <p class="whs6"> </p>
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206 <p class="whs6">- <span style="font-weight: bold;"><B>Propagation
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207 Time </B></span>field: this parameter controls the maximum length of the stream
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208 line (measured in units of time)</p>
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210 <p class="whs6"> </p>
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212 <p class="whs13">- Direction <span style="font-weight: normal;">choose
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213 box: this option allows to select direction of the stream lines.(Forward,
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214 Backward or Both)</span></p>
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216 <p class="whs13"> </p>
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218 <p class="whs6">- <span style="font-weight: bold;"><B>Magnitude
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219 coloring</B></span> check box: this option allows to color your presentation
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220 according the vector values applied to the cells of the mesh or to display
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221 it using only one color (this color can be selected if you click <span
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222 style="font-weight: bold;"><B>Use Color </B></span>button).</p>
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224 <p class="whs2"> </p>
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226 <p><span style="font-weight: bold;"><B>Scalar Bar </B></span>tab allows to define
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227 the parameters of the scalar bar displayed along with this presentation
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228 (<a href="scalar_map_presentation.htm#Scalar Bar">see also</a>).</p>
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232 <p class="whs2"><span style="font-family: 'Times New Roman', serif;">After
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233 you have finished with setting these parameters, click <span style="font-weight: bold;"><B>OK.
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234 </B></span>Your presentation with scalar bar will be immediately displayed
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235 in the viewer: </span></p>
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237 <p class="whs2"> </p>
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239 <p class="whs6"> <img src="../pics/streamlinesprsnt.jpg" x-maintain-ratio="TRUE" width="574px" height="411px" border="0" class="img_whs14"></p>
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