Charting tracks in Volocity 3

Continuing from last month’s tracking tip I will present the tracked data using Charting in Volocity Classification.

Firstly you will need to switch to the ‘Measurements’ view and show the tracking measurements.

Please see above that I have selected those tracks that I want to plot.

Next go to the ‘Measurements’ menu and select the option ‘Chart Tracks’

Depending on what sort of chart you want there are three options to select from in the ‘Chart Tracks’ dialog.

For this example we will take a look at a chart produced with the option ‘Relative track positions’. Here all tracks are plotted with the same origin (0,0,0) so that they can be easily compared. However just to cover the other two options;

  • Absolute track positions charts the plots according to their actual positions in the volume.
  • Heading and Distance charts the heading/direction against the distance/length of the track.

If you don’t like the title of the chart all you have to do is change the properties.

Edit the name as required then click the ‘Change’ button.

To change the style of the chart go to the ‘Charting’ menu and select ‘Style’

This will open the ‘Chart Setup’ dialog.

There are many styles to choose from and although our chart looks good, as it was produced using data from a 4D image sequence, why don’t we try a ‘3D Line’ chart style and see how it looks in 3D?

You will probably notice that as you change the options in the ‘Chart Setup’, the changes will be applied to the chart as it is displayed in the background.

When viewing a 3D chart you can click and drag the chart to change its orientation.

If the chart looks a bit small hold down the ‘alt’ key and click and drag the mouse down or up to zoom in and out respectively. If you are already familiar with volume rendering in Volocity Visualization you shouldn’t have any trouble doing this.

If you need to change any details about the axes, go to the ‘Charting’ menu and select ‘Axis’ then pick the axis you want to modify.

This will open the ‘Axis’ dialog where you can change the parameters. Take a look at the dialog below to get an idea of the changes you can make.

If you want to hide some of the tracks you have plotted go to the ‘Charting’ menu and select ‘Hide/Show Plots’.

This will open the ‘Hide/Show Plots’ dialog where the plots can be hidden by un-checking them.

Under the ‘Charting’ menu there are also further options to ‘Hide/Show Title’ and ‘Hide/Show Legend’. If you are using a 3D chart like me you will also have the option to ‘Hide/Show Orientation’.

Under the ‘Charting’ menu there is also an option to ‘Capture Snapshot’. This will produce a Snapshot in the library view that can easily be exported and used for presentation purposes.

If you have a 3D chart you will also see the option to export as a QTVR. This will allow you to create a QTVR that can viewed and manipulated from within QuickTime.

The ‘Reset View’ option resets the view to the default so if you get yourself in a bit of a mess you can always reset the chart position to how it first appeared. The final item in the ‘Charting’ menu is the ‘View Options’ on selecting this the ‘View Options’ dialog will open, take a look at the screen shot below for details.

I hope you enjoyed this crash course in charting tracks, that’s all until next time. See you next month!