VRFieldOfView.VRFieldOfView()

The VRFieldOfView() constructor creates a new VRFieldOFView object.

Syntax

There are two forms of this constructor, which take their information in slightly different ways. The first one accepts four separate arguments — the VRFieldOfViewReadOnly.upDegrees, VRFieldOfViewReadOnly.rightDegrees, VRFieldOfViewReadOnly.downDegrees, and VRFieldOfViewReadOnly.leftDegrees values you want the field of view to have

var myFOV = new VRFieldOfView(upDegrees, rightDegrees, downDegrees, leftDegrees);

The second one takes a VRFieldOfViewInit object as a single argument, which is just a dictionary containing the four degree values mentioned above:

var init = {upDegrees:up,rightDegrees:right,downDegrees:down,leftDegrees:left}
var myFOV = new VRFieldOfView(init);

Parameters

• Four argument version:

  upDegrees

  The number of degrees upwards that the field of view will extend in.

  rightDegrees

  The number of degrees to the right that the field of view will extend in.

  downDegrees

  The number of degrees downwards that the field of view will extend in.

  leftDegrees

  The number of degrees to the left that the field of view will extend in.

• One argument version:

  init

  A dictionary object containing the four degree values specified above.

Examples

The following simple example shows a function that can be used to set a custom field of view with four specified degree values for up, right, down and left. The VRFieldOfView() constructor is used to create a VRFieldOfView object from the supplied values, which is then fed into the HMDVRDevice.setFieldOfView method.

function setCustomFOV(up,right,down,left) {
  var testFOV = new VRFieldOfView(up,right,down,left);

  gHMD.setFieldOfView(testFOV,testFOV,0.01,10000.0);

  var lEye = gHMD.getEyeParameters('left');
  var rEye = gHMD.getEyeParameters('right');
  console.log(lEye.currentFieldOfView);
  console.log(rEye.currentFieldOfView);
}

Browser compatibility

See also

• WebVR API homepage.
• MozVr.com — demos, downloads, and other resources from the Mozilla VR team.