| 1 | <html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>8.7. Enhanced Trajectory Drawing</title><link rel="stylesheet" href="../xml/XSLCustomizationLayer/G4HTMLStylesheet.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.71.1"><link rel="start" href="index.html" title="Geant4 User's Guide for Application Developers"><link rel="up" href="ch08.html" title="Chapter 8. Visualization"><link rel="prev" href="ch08s06.html" title="8.6. Visualization Attributes"><link rel="next" href="ch08s08.html" title="8.8. Trajectory Filtering"><script language="JavaScript">
|
|---|
| 2 | function remote_win(fName)
|
|---|
| 3 | {
|
|---|
| 4 | var url = "AllResources/Detector/geometry.src/" + fName;
|
|---|
| 5 | RemoteWin=window.open(url,"","resizable=no,toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,copyhistory=0,width=520,height=520")
|
|---|
| 6 | RemoteWin.creator=self
|
|---|
| 7 | }
|
|---|
| 8 | </script></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">8.7.
|
|---|
| 9 | Enhanced Trajectory Drawing
|
|---|
| 10 | </th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ch08s06.html"><img src="AllResources/IconsGIF/prev.gif" alt="Prev"></a> </td><th width="60%" align="center">Chapter 8.
|
|---|
| 11 | Visualization
|
|---|
| 12 | </th><td width="20%" align="right"> <a accesskey="n" href="ch08s08.html"><img src="AllResources/IconsGIF/next.gif" alt="Next"></a></td></tr></table><hr></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="sect.VisEnhTrj"></a>8.7.
|
|---|
| 13 | Enhanced Trajectory Drawing
|
|---|
| 14 | </h2></div></div></div><div class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="sect.VisEnhTrj.DflCnfg"></a>8.7.1.
|
|---|
| 15 | Default Configuration
|
|---|
| 16 | </h3></div></div></div><p>
|
|---|
| 17 | Trajectory drawing styles are specified through trajectory drawing
|
|---|
| 18 | models. Each drawing model has a default configuration provided
|
|---|
| 19 | through a G4VisTrajContext object. The default context settings are
|
|---|
| 20 | shown below.
|
|---|
| 21 |
|
|---|
| 22 | </p><div class="informaltable"><table border="1"><colgroup><col><col></colgroup><tbody><tr><td>
|
|---|
| 23 | <span class="bold"><strong>Property</strong></span>
|
|---|
| 24 | </td><td>
|
|---|
| 25 | <span class="bold"><strong>Default Setting</strong></span>
|
|---|
| 26 | </td></tr><tr><td>
|
|---|
| 27 | Line colour
|
|---|
| 28 | </td><td>
|
|---|
| 29 | grey
|
|---|
| 30 | </td></tr><tr><td>
|
|---|
| 31 | Line visibility
|
|---|
| 32 | </td><td>
|
|---|
| 33 | true
|
|---|
| 34 | </td></tr><tr><td>
|
|---|
| 35 | Draw line
|
|---|
| 36 | </td><td>
|
|---|
| 37 | true
|
|---|
| 38 | </td></tr><tr><td>
|
|---|
| 39 | Draw auxiliary points
|
|---|
| 40 | </td><td>
|
|---|
| 41 | false
|
|---|
| 42 | </td></tr><tr><td>
|
|---|
| 43 | Auxiliary point type
|
|---|
| 44 | </td><td>
|
|---|
| 45 | squares
|
|---|
| 46 | </td></tr><tr><td>
|
|---|
| 47 | Auxiliary point size
|
|---|
| 48 | </td><td>
|
|---|
| 49 | 0
|
|---|
| 50 | </td></tr><tr><td>
|
|---|
| 51 | Auxiliary point fill style
|
|---|
| 52 | </td><td>
|
|---|
| 53 | filled
|
|---|
| 54 | </td></tr><tr><td>
|
|---|
| 55 | Auxiliary point colour
|
|---|
| 56 | </td><td>
|
|---|
| 57 | magenta
|
|---|
| 58 | </td></tr><tr><td>
|
|---|
| 59 | Auxiliary point visibility
|
|---|
| 60 | </td><td>
|
|---|
| 61 | true
|
|---|
| 62 | </td></tr><tr><td>
|
|---|
| 63 | Draw step point
|
|---|
| 64 | </td><td>
|
|---|
| 65 | false
|
|---|
| 66 | </td></tr><tr><td>
|
|---|
| 67 | Step point type
|
|---|
| 68 | </td><td>
|
|---|
| 69 | circles
|
|---|
| 70 | </td></tr><tr><td>
|
|---|
| 71 | Step point size
|
|---|
| 72 | </td><td>
|
|---|
| 73 | 0
|
|---|
| 74 | </td></tr><tr><td>
|
|---|
| 75 | Step point fill style
|
|---|
| 76 | </td><td>
|
|---|
| 77 | filled
|
|---|
| 78 | </td></tr><tr><td>
|
|---|
| 79 | Step point colour
|
|---|
| 80 | </td><td>
|
|---|
| 81 | yellow
|
|---|
| 82 | </td></tr><tr><td>
|
|---|
| 83 | Step point visibility
|
|---|
| 84 | </td><td>
|
|---|
| 85 | true
|
|---|
| 86 | </td></tr><tr><td>
|
|---|
| 87 | Time slice interval
|
|---|
| 88 | </td><td>
|
|---|
| 89 | 0
|
|---|
| 90 | </td></tr></tbody></table></div><p>
|
|---|
| 91 | </p><p>
|
|---|
| 92 | Points to note:
|
|---|
| 93 |
|
|---|
| 94 | </p><div class="itemizedlist"><ul type="disc" compact><li><p>
|
|---|
| 95 | The context approach is intended to replace the configuration
|
|---|
| 96 | through the imode parameter. The use of imode is depreciated and
|
|---|
| 97 | will be removed in Geant4 v9.0.
|
|---|
| 98 | </p></li><li><p>
|
|---|
| 99 | Different visualisation drivers handle trajectory configuration
|
|---|
| 100 | in different ways, so trajectories may not necessarily get
|
|---|
| 101 | displayed as you have configured them.
|
|---|
| 102 | </p></li></ul></div><p>
|
|---|
| 103 | </p></div><div class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="sect.VisEnhTrj.DrdMdl"></a>8.7.2.
|
|---|
| 104 | Trajectory Drawing Models
|
|---|
| 105 | </h3></div></div></div><p>
|
|---|
| 106 | A trajectory drawing model can override the default context
|
|---|
| 107 | according to the properties of a given trajectory. The following
|
|---|
| 108 | models are supplied with the Geant4 distribution:
|
|---|
| 109 |
|
|---|
| 110 | </p><div class="itemizedlist"><ul type="disc" compact><li><p>
|
|---|
| 111 | G4TrajectoryGenericDrawer (generic)
|
|---|
| 112 | </p></li><li><p>
|
|---|
| 113 | G4TrajectoryDrawByCharge (drawByCharge)
|
|---|
| 114 | </p></li><li><p>
|
|---|
| 115 | G4TrajectoryDrawByParticleID (drawByParticleID)
|
|---|
| 116 | </p></li><li><p>
|
|---|
| 117 | G4TrajectoryDrawByOriginVolume (drawByOriginVolume)
|
|---|
| 118 | </p></li><li><p>
|
|---|
| 119 | G4TrajectoryDrawByAttribute (drawByAttribute)
|
|---|
| 120 | </p></li></ul></div><p>
|
|---|
| 121 | </p><p>
|
|---|
| 122 | Both the context and model properties can be configured by the
|
|---|
| 123 | user. The models are described briefly below, followed by some
|
|---|
| 124 | example configuration commands.
|
|---|
| 125 | </p><h5><a name="id517690"></a>
|
|---|
| 126 | G4TrajectoryGenericDrawer
|
|---|
| 127 | </h5><p>
|
|---|
| 128 | This model simply draws all trajectories in the same style, with
|
|---|
| 129 | the properties provided by the context.
|
|---|
| 130 | </p><h5><a name="id517703"></a>
|
|---|
| 131 | G4TrajectoryDrawByCharge
|
|---|
| 132 | </h5><p>
|
|---|
| 133 | This is the default model - if no model is specified by the user,
|
|---|
| 134 | this model will be constructed automatically. The trajectory lines
|
|---|
| 135 | are coloured according to charge, with all other configuration
|
|---|
| 136 | parameters provided by the default context. The default colouring
|
|---|
| 137 | scheme is shown below.
|
|---|
| 138 |
|
|---|
| 139 | </p><div class="informalexample"><pre class="programlisting">
|
|---|
| 140 | Charge Colour
|
|---|
| 141 | ----------------------
|
|---|
| 142 | 1 Blue
|
|---|
| 143 | -1 Red
|
|---|
| 144 | 0 Green
|
|---|
| 145 | </pre></div><p>
|
|---|
| 146 | </p><h5><a name="id517728"></a>
|
|---|
| 147 | G4TrajectoryDrawByParticleID
|
|---|
| 148 | </h5><p>
|
|---|
| 149 | This model colours trajectory lines according to particle type. All
|
|---|
| 150 | other configuration parameters are provided by the default context.
|
|---|
| 151 | By default, all trajectories are coloured grey. Chosen particle
|
|---|
| 152 | types can be highlighted with specified colours.
|
|---|
| 153 | </p><h5><a name="id517742"></a>
|
|---|
| 154 | G4TrajectoryDrawByOriginVolume
|
|---|
| 155 | </h5><p>
|
|---|
| 156 | This model colours trajectory lines according to the trajectories
|
|---|
| 157 | originating volume name. The volume can be either a logical or
|
|---|
| 158 | physical volume. Physical volume takes precedence over logical
|
|---|
| 159 | volume. All trajectories are coloured grey by default.
|
|---|
| 160 | </p><h5><a name="id517756"></a>
|
|---|
| 161 | G4TrajectoryDrawByAttribute
|
|---|
| 162 | </h5><p>
|
|---|
| 163 | This model draws trajectories based on the HepRep style attributes
|
|---|
| 164 | associated with trajectories. Each attribute drawer can be configured
|
|---|
| 165 | with interval and/or single value data. A new context object is
|
|---|
| 166 | created for each interval/single value. This makes it possible to
|
|---|
| 167 | have different step point markers etc, as well as line colour for
|
|---|
| 168 | trajectory attributes falling into different intervals, or matching
|
|---|
| 169 | single values. The single value data should override the interval data,
|
|---|
| 170 | allowing specific values to be highlighted. Units should be specified
|
|---|
| 171 | on the command line if the attribute unit is specified either as a
|
|---|
| 172 | G4BestUnit or if the unit is part of the value string.
|
|---|
| 173 | </p></div><div class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="sect.VisEnhTrj.CntlComm"></a>8.7.3.
|
|---|
| 174 | Controlling from Commands
|
|---|
| 175 | </h3></div></div></div><p>
|
|---|
| 176 | Multiple trajectory models can be created and configured using
|
|---|
| 177 | commands in the "<code class="literal">/vis/modeling/trajectories/</code>" directory.
|
|---|
| 178 | It is then possible to list available models and select one to be
|
|---|
| 179 | current.
|
|---|
| 180 | </p><p>
|
|---|
| 181 | Model configuration commands are generated dynamically when a
|
|---|
| 182 | model is instantiated. These commands apply directly to that
|
|---|
| 183 | instance. This makes it possible to have multiple instances of the
|
|---|
| 184 | drawByCharge model for example, each independently configurable
|
|---|
| 185 | through it's own set of commands.
|
|---|
| 186 | </p><p>
|
|---|
| 187 | See the interactive help for more information on the available
|
|---|
| 188 | commands.
|
|---|
| 189 | </p><div class="sect3" lang="en"><div class="titlepage"><div><div><h4 class="title"><a name="sect.VisEnhTrj.CntlComm.ExpComm"></a>8.7.3.1.
|
|---|
| 190 | Example commands
|
|---|
| 191 | </h4></div></div></div><p>
|
|---|
| 192 | #Create a generic model named generic-0 by default
|
|---|
| 193 |
|
|---|
| 194 | </p><div class="informalexample"><pre class="programlisting">
|
|---|
| 195 | /vis/modeling/trajectories/create/generic
|
|---|
| 196 | </pre></div><p>
|
|---|
| 197 | </p><p>
|
|---|
| 198 | #Configure context to colour all trajectories red
|
|---|
| 199 |
|
|---|
| 200 | </p><div class="informalexample"><pre class="programlisting">
|
|---|
| 201 | /vis/modeling/trajectories/generic-0/default/setLineColour red
|
|---|
| 202 | </pre></div><p>
|
|---|
| 203 | </p><p>
|
|---|
| 204 | #Create a drawByCharge model named drawCharge-0 by default
|
|---|
| 205 | (Subsequent models will be named drawByCharge-1, drawByCharge-2,
|
|---|
| 206 | etc.)
|
|---|
| 207 |
|
|---|
| 208 | </p><div class="informalexample"><pre class="programlisting">
|
|---|
| 209 | /vis/modeling/trajectories/create/drawByCharge
|
|---|
| 210 | </pre></div><p>
|
|---|
| 211 | </p><p>
|
|---|
| 212 | #Create a drawByCharge model named testChargeModel
|
|---|
| 213 |
|
|---|
| 214 | </p><div class="informalexample"><pre class="programlisting">
|
|---|
| 215 | /vis/modeling/trajectories/create/drawByCharge testChargeModel
|
|---|
| 216 | </pre></div><p>
|
|---|
| 217 | </p><p>
|
|---|
| 218 | #Configure drawByCharge-0 model
|
|---|
| 219 |
|
|---|
| 220 | </p><div class="informalexample"><pre class="programlisting">
|
|---|
| 221 | /vis/modeling/trajectories/drawByCharge-0/set 1 red
|
|---|
| 222 | /vis/modeling/trajectories/drawByCharge-0/set -1 red
|
|---|
| 223 | /vis/modeling/trajectories/drawByCharge-0/set 0 white
|
|---|
| 224 | </pre></div><p>
|
|---|
| 225 | </p><p>
|
|---|
| 226 | #Configure testCharge model through G4Colour components
|
|---|
| 227 |
|
|---|
| 228 | </p><div class="informalexample"><pre class="programlisting">
|
|---|
| 229 | /vis/modeling/trajectories/testChargeModel/setRGBA 1 0 1 1 1
|
|---|
| 230 | /vis/modeling/trajectories/testChargeModel/setRGBA -1 0.5 0.5 0.5 1
|
|---|
| 231 | /vis/modeling/trajectories/testChargeModel/setRGBA 0 1 1 0 1
|
|---|
| 232 | </pre></div><p>
|
|---|
| 233 | </p><p>
|
|---|
| 234 | #Create a drawByParticleID model named drawByParticleID-0
|
|---|
| 235 |
|
|---|
| 236 | </p><div class="informalexample"><pre class="programlisting">
|
|---|
| 237 | /vis/modeling/trajectories/create/drawByParticleID
|
|---|
| 238 | </pre></div><p>
|
|---|
| 239 | </p><p>
|
|---|
| 240 | #Configure drawByParticleID-0 model
|
|---|
| 241 |
|
|---|
| 242 | </p><div class="informalexample"><pre class="programlisting">
|
|---|
| 243 | /vis/modeling/trajectories/drawByParticleID-0/set gamma red
|
|---|
| 244 | /vis/modeling/trajectories/drawByParticleID-0/setRGBA e+ 1 0 1 1
|
|---|
| 245 | </pre></div><p>
|
|---|
| 246 | </p><p>
|
|---|
| 247 | #List available models
|
|---|
| 248 |
|
|---|
| 249 | </p><div class="informalexample"><pre class="programlisting">
|
|---|
| 250 | /vis/modeling/trajectories/list
|
|---|
| 251 | </pre></div><p>
|
|---|
| 252 | </p><p>
|
|---|
| 253 | #select drawByParticleID-0 to be current
|
|---|
| 254 |
|
|---|
| 255 | </p><div class="informalexample"><pre class="programlisting">
|
|---|
| 256 | /vis/modeling/trajectories/select drawByParticleID-0
|
|---|
| 257 | </pre></div><p>
|
|---|
| 258 | </p><p>
|
|---|
| 259 | #Create a drawByAttribute model named drawByAttribute-0
|
|---|
| 260 |
|
|---|
| 261 | </p><div class="informalexample"><pre class="programlisting">
|
|---|
| 262 | /vis/modeling/trajectories/create/drawByAttribute
|
|---|
| 263 | </pre></div><p>
|
|---|
| 264 | </p><p>
|
|---|
| 265 | #Configure drawByAttribute-0 model
|
|---|
| 266 |
|
|---|
| 267 | </p><div class="informalexample"><pre class="programlisting">
|
|---|
| 268 | /vis/modeling/trajectories/drawByAttribute-0/verbose true
|
|---|
| 269 | </pre></div><p>
|
|---|
| 270 | </p><p>
|
|---|
| 271 | #Select attribute "CPN"
|
|---|
| 272 |
|
|---|
| 273 | </p><div class="informalexample"><pre class="programlisting">
|
|---|
| 274 | /vis/modeling/trajectories/drawByAttribute-0/setAttribute CPN
|
|---|
| 275 | </pre></div><p>
|
|---|
| 276 | </p><p>
|
|---|
| 277 | #Configure single value data
|
|---|
| 278 |
|
|---|
| 279 | </p><div class="informalexample"><pre class="programlisting">
|
|---|
| 280 | /vis/modeling/trajectories/drawByAttribute-0/addValue brem_key eBrem
|
|---|
| 281 | /vis/modeling/trajectories/drawByAttribute-0/addValue annihil_key annihil
|
|---|
| 282 | /vis/modeling/trajectories/drawByAttribute-0/addValue decay_key Decay
|
|---|
| 283 | /vis/modeling/trajectories/drawByAttribute-0/addValue muIon_key muIoni
|
|---|
| 284 | /vis/modeling/trajectories/drawByAttribute-0/addValue eIon_key eIoni
|
|---|
| 285 |
|
|---|
| 286 | /vis/modeling/trajectories/drawByAttribute-0/brem_key/setLineColour red
|
|---|
| 287 | /vis/modeling/trajectories/drawByAttribute-0/annihil_key/setLineColour green
|
|---|
| 288 | /vis/modeling/trajectories/drawByAttribute-0/decay_key/setLineColour cyan
|
|---|
| 289 | /vis/modeling/trajectories/drawByAttribute-0/eIon_key/setLineColour yellow
|
|---|
| 290 | /vis/modeling/trajectories/drawByAttribute-0/muIon_key/setLineColour magenta
|
|---|
| 291 | </pre></div><p>
|
|---|
| 292 | </p><p>
|
|---|
| 293 | #Create a drawByAttribute model named drawByAttribute-1
|
|---|
| 294 |
|
|---|
| 295 | </p><div class="informalexample"><pre class="programlisting">
|
|---|
| 296 | /vis/modeling/trajectories/create/drawByAttribute
|
|---|
| 297 | </pre></div><p>
|
|---|
| 298 | </p><p>
|
|---|
| 299 | #Select "IMag" attribute
|
|---|
| 300 |
|
|---|
| 301 | </p><div class="informalexample"><pre class="programlisting">
|
|---|
| 302 | /vis/modeling/trajectories/drawByAttribute-1/setAttribute IMag
|
|---|
| 303 | </pre></div><p>
|
|---|
| 304 | </p><p>
|
|---|
| 305 | #Configure interval data
|
|---|
| 306 |
|
|---|
| 307 | </p><div class="informalexample"><pre class="programlisting">
|
|---|
| 308 | /vis/modeling/trajectories/drawByAttribute-1/addInterval interval1 0.0 keV 2.5MeV
|
|---|
| 309 | /vis/modeling/trajectories/drawByAttribute-1/addInterval interval2 2.5 MeV 5 MeV
|
|---|
| 310 | /vis/modeling/trajectories/drawByAttribute-1/addInterval interval3 5 MeV 7.5 MeV
|
|---|
| 311 | /vis/modeling/trajectories/drawByAttribute-1/addInterval interval4 7.5 MeV 10 MeV
|
|---|
| 312 | /vis/modeling/trajectories/drawByAttribute-1/addInterval interval5 10 MeV 12.5 MeV
|
|---|
| 313 | /vis/modeling/trajectories/drawByAttribute-1/addInterval interval6 12.5 MeV 10000 MeV
|
|---|
| 314 |
|
|---|
| 315 | /vis/modeling/trajectories/drawByAttribute-1/interval1/setLineColourRGBA 0.8 0 0.8 1
|
|---|
| 316 | /vis/modeling/trajectories/drawByAttribute-1/interval2/setLineColourRGBA 0.23 0.41 1 1
|
|---|
| 317 | /vis/modeling/trajectories/drawByAttribute-1/interval3/setLineColourRGBA 0 1 0 1
|
|---|
| 318 | /vis/modeling/trajectories/drawByAttribute-1/interval4/setLineColourRGBA 1 1 0 1
|
|---|
| 319 | /vis/modeling/trajectories/drawByAttribute-1/interval5/setLineColourRGBA 1 0.3 0 1
|
|---|
| 320 | /vis/modeling/trajectories/drawByAttribute-1/interval6/setLineColourRGBA 1 0 0 1
|
|---|
| 321 | </pre></div><p>
|
|---|
| 322 | </p></div></div><div class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="sect.VisEnhTrj.CntlCmpl"></a>8.7.4.
|
|---|
| 323 | Controlling from Compiled Code
|
|---|
| 324 | </h3></div></div></div><p>
|
|---|
| 325 | It is possible to use the enhanced trajectory drawing functionality
|
|---|
| 326 | in compiled code as well as from commands. Multiple trajectory
|
|---|
| 327 | models can be instantiated, configured and registered with
|
|---|
| 328 | G4VisManager. Only one model may be current. For example:
|
|---|
| 329 |
|
|---|
| 330 | </p><div class="informalexample"><pre class="programlisting">
|
|---|
| 331 | G4VisManager* visManager = new G4VisExecutive;
|
|---|
| 332 | visManager->Initialize();
|
|---|
| 333 |
|
|---|
| 334 | G4TrajectoryDrawByParticleID* model = new G4TrajectoryDrawByParticleID;
|
|---|
| 335 | G4TrajectoryDrawByParticleID* model2 = new G4TrajectoryDrawByParticleID("test");
|
|---|
| 336 |
|
|---|
| 337 | model->SetDefault("cyan");
|
|---|
| 338 | model->Set("gamma", "green");
|
|---|
| 339 | model->Set("e+", "magenta");
|
|---|
| 340 | model->Set("e-", G4Colour(0.3, 0.3, 0.3));
|
|---|
| 341 |
|
|---|
| 342 | visManager->RegisterModel(model);
|
|---|
| 343 | visManager->RegisterModel(model2);
|
|---|
| 344 |
|
|---|
| 345 | visManager->SelectTrajectoryModel(model->Name());
|
|---|
| 346 | </pre></div><p>
|
|---|
| 347 | </p></div><div class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="sect.VisEnhTrj.DrwByTime"></a>8.7.5.
|
|---|
| 348 | Drawing by time
|
|---|
| 349 | </h3></div></div></div><p>
|
|---|
| 350 | To draw by time, you need to use a trajectory that records the
|
|---|
| 351 | track time at the beginning and end of each step. To do this, write
|
|---|
| 352 | a tracking action that sets G4RichTrajectory, for example:
|
|---|
| 353 |
|
|---|
| 354 | </p><div class="informalexample"><pre class="programlisting">
|
|---|
| 355 | #include "G4UserTrackingAction.hh"
|
|---|
| 356 | class G4Track;
|
|---|
| 357 | class MyTrackingAction : public G4UserTrackingAction
|
|---|
| 358 | {
|
|---|
| 359 | public:
|
|---|
| 360 | virtual void PreUserTrackingAction(const G4Track* aTrack);
|
|---|
| 361 | };
|
|---|
| 362 | #include "G4RichTrajectory.hh"
|
|---|
| 363 | #include "G4TrackingManager.hh"
|
|---|
| 364 | #include "G4IdentityTrajectoryFilter.hh"
|
|---|
| 365 | #include "G4TransportationManager.hh"
|
|---|
| 366 | #include "G4PropagatorInField.hh"
|
|---|
| 367 | void MyTrackingAction::PreUserTrackingAction(const G4Track* aTrack)
|
|---|
| 368 | {
|
|---|
| 369 | // Require rich trajectory...
|
|---|
| 370 | fpTrackingManager->SetTrajectory(new G4RichTrajectory(aTrack));
|
|---|
| 371 |
|
|---|
| 372 | // Activate storing of auxiliary points for smoother trajectory...
|
|---|
| 373 | static G4IdentityTrajectoryFilter curvedFilter;
|
|---|
| 374 | G4TransportationManager::GetTransportationManager()->
|
|---|
| 375 | GetPropagatorInField()->SetTrajectoryFilter(&curvedFilter);
|
|---|
| 376 | }
|
|---|
| 377 | </pre></div><p>
|
|---|
| 378 |
|
|---|
| 379 | and register an instance of this with the run manager (this can be
|
|---|
| 380 | done once and for all as soon as the run manager is instantiated,
|
|---|
| 381 | probably in your main program):
|
|---|
| 382 |
|
|---|
| 383 | </p><div class="informalexample"><pre class="programlisting">
|
|---|
| 384 | #include "MyTrackingAction.hh"
|
|---|
| 385 | ...
|
|---|
| 386 | runManager -> SetUserAction (new MyTrackingAction);
|
|---|
| 387 | </pre></div><p>
|
|---|
| 388 | </p><p>
|
|---|
| 389 | When you run, you need to create a trajectory model and set the
|
|---|
| 390 | time slice interval (remembering that paticles are often
|
|---|
| 391 | relativistic and travel 30 cm/ns):
|
|---|
| 392 |
|
|---|
| 393 | </p><div class="informalexample"><pre class="programlisting">
|
|---|
| 394 | /vis/modeling/trajectories/create/drawByCharge
|
|---|
| 395 | /vis/modeling/trajectories/drawByCharge-0/default/setDrawStepPts true
|
|---|
| 396 | /vis/modeling/trajectories/drawByCharge-0/default/setStepPtsSize 5
|
|---|
| 397 | /vis/modeling/trajectories/drawByCharge-0/default/setDrawAuxPts true
|
|---|
| 398 | /vis/modeling/trajectories/drawByCharge-0/default/setAuxPtsSize 5
|
|---|
| 399 | /vis/modeling/trajectories/drawByCharge-0/default/setTimeSliceInterval 0.1 ns
|
|---|
| 400 | /vis/modeling/trajectories/list
|
|---|
| 401 | </pre></div><p>
|
|---|
| 402 |
|
|---|
| 403 | and use a graphics driver that can display by time:
|
|---|
| 404 |
|
|---|
| 405 | </p><div class="informalexample"><pre class="programlisting">
|
|---|
| 406 | /vis/open OGLSX
|
|---|
| 407 | /vis/drawVolume
|
|---|
| 408 | /vis/scene/add/trajectories
|
|---|
| 409 | /vis/ogl/set/startTime 0.5 ns
|
|---|
| 410 | /vis/ogl/set/endTime 0.8 ns
|
|---|
| 411 | /run/beamOn
|
|---|
| 412 | /vis/viewer/refresh
|
|---|
| 413 | </pre></div><p>
|
|---|
| 414 | </p><p>
|
|---|
| 415 | A good way to see the particles moving through the detector is:
|
|---|
| 416 |
|
|---|
| 417 | </p><div class="informalexample"><pre class="programlisting">
|
|---|
| 418 | /vis/ogl/set/fade 1
|
|---|
| 419 | /vis/ogl/set/displayHeadTime true
|
|---|
| 420 | /control/alias timeRange 1
|
|---|
| 421 | /control/loop movie.loop -{timeRange} 40 0.1
|
|---|
| 422 | </pre></div><p>
|
|---|
| 423 |
|
|---|
| 424 | where <code class="literal">fade</code> gives a vapour-trail effect,
|
|---|
| 425 | <code class="literal">displayHeadTime</code> displays the time of the leading edge as
|
|---|
| 426 | 2D text, and <code class="literal">movie.loop</code> is a macro file:
|
|---|
| 427 |
|
|---|
| 428 | </p><div class="informalexample"><pre class="programlisting">
|
|---|
| 429 | /vis/ogl/set/startTime {startTime} ns {timeRange} ns
|
|---|
| 430 | </pre></div><p>
|
|---|
| 431 | </p><p>
|
|---|
| 432 | From there, it's straightforward to <a href="ch08s10.html" title="8.10.
|
|---|
| 433 | Making a Movie
|
|---|
| 434 | ">Section 8.10</a>
|
|---|
| 435 | make a movie.
|
|---|
| 436 | </p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="ch08s06.html"><img src="AllResources/IconsGIF/prev.gif" alt="Prev"></a> </td><td width="20%" align="center"><a accesskey="u" href="ch08.html"><img src="AllResources/IconsGIF/up.gif" alt="Up"></a></td><td width="40%" align="right"> <a accesskey="n" href="ch08s08.html"><img src="AllResources/IconsGIF/next.gif" alt="Next"></a></td></tr><tr><td width="40%" align="left" valign="top">8.6.
|
|---|
| 437 | Visualization Attributes
|
|---|
| 438 | </td><td width="20%" align="center"><a accesskey="h" href="index.html"><img src="AllResources/IconsGIF/home.gif" alt="Home"></a></td><td width="40%" align="right" valign="top"> 8.8.
|
|---|
| 439 | Trajectory Filtering
|
|---|
| 440 | </td></tr></table></div></body></html>
|
|---|
