Building Virtual Reality with Unity and SteamVR by Murray Jeff W.;

Author:Murray, Jeff W.;
Language: eng
Format: epub
Publisher: CRC Press LLC
Published: 2020-03-20T16:00:00+00:00

Using Vibration/Haptic Feedback

As seen in the script from the previous section, SteamVR provides a method for haptic feedback through its SteamVR_Action_Vibration class. In this section, I wanted to provide a little bit of information, separate from the example project, on how you can implement this for yourself in your own scripts.

To use haptics, you start with a variable declaration like this:

public SteamVR_Action_Vibration hapticAction = SteamVR_Input.GetVibrationAction("default", "haptic", false);

You will also need a hand type to tell the hapticAction which hand to vibrate on. In the script from the previous section, we found the hand by looking at the Interactable Component’s attachedHand variable. In Chapter 5, however, when we added controller input to the laser pointer, the hand was set in the Unity Inspector instead. To declare the hand so that it can be set in the Inspector you can make a public SteamVR_Input_Sources type variable like this:

public SteamVR_Input_Sources myHand;

Then, any time you want to make a controller vibrate, the syntax is

hapticAction.Execute(seconds_from_now, haptic_ duration, haptic_frequency, haptic_amplitude, myHand);

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