Maths channels can be used to create a new channel to be displayed using a combination of the existing parameters. An example may be hill gradient which can be calculated from the horizontal speed and the vertical speed.
To add a new maths channel to a scene, select 'Settings > Maths channels' to open the equation editor.
To return to the scene designer, either use the ‘Settings’ button again, or press the ‘X’ in the top right corner of the general settings area.
There are three main areas of the Maths channels area:
- The green box highlights the area where new maths channels can be added and lists all maths channels that are currently configured.
- The purple box highlights the equation editor, which is used to write new expressions.
- The blue box highlights the units to be used in the currently selected equation.
Creating a new maths channel
To create a new maths channel, click ‘Create new’. This will add a new channel and open the equation editor.
Within the equation editor, enter the maths expression using the drop down lists for available channels and functions.
Below is an example for ‘Combo G’.
To check the equation is working as expected, press ‘test’. This will bring up a window where test values can be entered, before a results window is shown.
Enter a name for the Maths channel and make sure that the units on the right are correct.
If you require a unit for the channel to be included within the .vbo file, enter a value in the section below the channel name, click ‘OK’ to save changes.
Once a Maths Channel has been saved, it will appear in the ‘Maths channels’ list. The user can then assign an element to show data from this maths channel in the video overlay.
For more information on assigning channels to elements and element setup, see the elements section and select the element that is being used.
The channels shown in the equation editor are all channels currently being logged by the HD2.
The standard channels are the GPS channels which are captured by default, and can always be accessed. The additional channels are any configured CAN channels, or any existing saved maths channels.
Supported functions are shown in the image below. Constants of G and PI are also supported.