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web api interface

VRFieldOfView

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The VRFieldOfView interface of the WebVR API represents a field of view defined by 4 different degree values describing the view from a center point.

[!NOTE] This interface was part of the old WebVR API. It has been superseded by the WebXR Device API.

Instance properties

  • upDegrees Deprecated Read only
    • : The number of degrees upwards that the field of view extends in.
  • rightDegrees Deprecated Read only
    • : The number of degrees to the right that the field of view extends in.
  • downDegrees Deprecated Read only
    • : The number of degrees downwards that the field of view extends in.
  • leftDegrees Deprecated Read only
    • : The number of degrees to the left that the field of view extends in.

Examples

const info = document.querySelector("p");
const list = document.querySelector("ul");
let vrDisplay;

if (navigator.getVRDisplays) {
  reportFieldOfView();
} else {
  info.textContent = "WebVR API not supported by this browser.";
}

function reportFieldOfView() {
  navigator.getVRDisplays().then((displays) => {
    vrDisplay = displays[0];
    const lEye = vrDisplay.getEyeParameters("left");
    const rEye = vrDisplay.getEyeParameters("right");
    // lEye and rEye are VREyeParameters objects

    const lFOV = lEye.fieldOfView;
    const rFOV = rEye.fieldOfView;
    // lFOV and rFOV are VRFieldOfView objects

    const listitem1 = document.createElement("li");
    const listitem2 = document.createElement("li");

    listitem1.innerText = `
Offset: ${lEye.offset}
Render width: ${lEye.renderWidth}
Render height: ${lEye.renderHeight}
Up degrees: ${lFOV.upDegrees}
Right degrees: ${lFOV.rightDegrees}
Down degrees: ${lFOV.downDegrees}
Left degrees: ${lFOV.leftDegrees}`;
    listitem1.insertBefore(
      document.createElement("strong"),
      listitem1.firstChild,
    ).textContent = "Left eye parameters";

    listitem2.innerText = `
Offset: ${rEye.offset}
Render width: ${rEye.renderWidth}
Render height: ${rEye.renderHeight}
Up degrees: ${rFOV.upDegrees}
Right degrees: ${rFOV.rightDegrees}
Down degrees: ${rFOV.downDegrees}
Left degrees: ${rFOV.leftDegrees}`;
    listitem2.insertBefore(
      document.createElement("strong"),
      listitem2.firstChild,
    ).textContent = "Right eye parameters";

    list.appendChild(listitem1);
    list.appendChild(listitem2);
  });
}

Specifications

This interface was part of the old WebVR API that has been superseded by the WebXR Device API. It is no longer on track to becoming a standard.

Until all browsers have implemented the new WebXR APIs, it is recommended to rely on frameworks, like A-Frame, Babylon.js, or Three.js, or a polyfill, to develop WebXR applications that will work across all browsers. Read Meta’s Porting from WebVR to WebXR guide for more information.

Browser compatibility

Browser compatibilityCompatibility data is available on the canonical MDN page.

See also