这是
实验性技术
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要小心谨慎在生产中使用这之前。
弃用
This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the
兼容性表格
at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
offset
只读特性在
VREyeParameters
interface
r
epresents the o
ffset from the center point between the user's eyes to the center of the eye, measured in meters.
This value should represent half the user’s interpupillary distance (IPD), but may also represent the distance from the center point of the headset to the center point of the lens for the given eye.
var myOffset = eyeParametersInstance.offset;
A
Float32Array
representing a vector describing the offset from the center point between the users eyes to the center of the eye in meters.
注意 : Values for the left eye will be negative; values for the right eye will be positive.
var info = document.querySelector('p');
var list = document.querySelector('ul');
var vrDisplay;
if(navigator.getVRDisplays) {
reportFieldOfView();
} else {
info.textContent = 'WebVR API not supported by this browser.'
}
function reportFieldOfView() {
navigator.getVRDisplays().then(function(displays) {
vrDisplay = displays[0];
var lEye = vrDisplay.getEyeParameters('left');
var rEye = vrDisplay.getEyeParameters('right');
// lEye and rEye are VREyeParameters objects
var lFOV = lEye.fieldOfView;
var rFOV = rEye.fieldOfView;
// lFOV and rFOV are VRFieldOfView objects
var listitem1 = document.createElement('li');
var listitem2 = document.createElement('li');
listitem1.innerHTML = '<strong>Left eye parameters</strong>'
+ '<br>Offset: ' + lEye.offset
+ '<br>Render width: ' + lEye.renderWidth
+ '<br>Render height: ' + lEye.renderHeight
+ '<br>Up degrees: ' + lFOV.upDegrees
+ '<br>Right degrees: ' + lFOV.rightDegrees
+ '<br>Down degrees: ' + lFOV.downDegrees
+ '<br>Left degrees: ' + lFOV.leftDegrees
listitem2.innerHTML = '<strong>Right eye parameters</strong>'
+ '<br>Offset: ' + rEye.offset
+ '<br>Render width: ' + rEye.renderWidth
+ '<br>Render height: ' + rEye.renderHeight
+ '<br>Up degrees: ' + rFOV.upDegrees
+ '<br>Right degrees: ' + rFOV.rightDegrees
+ '<br>Down degrees: ' + rFOV.downDegrees
+ '<br>Left degrees: ' + rFOV.leftDegrees
list.appendChild(listitem1);
list.appendChild(listitem2);
});
}
| 规范 | 状态 | 注释 |
|---|---|---|
|
WebVR 1.1
The definition of 'offset' in that specification. |
草案 | 初始定义 |
| 桌面 | 移动 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
offset
弃用
|
Chrome No | Edge 15 — 79 |
Firefox
55
|
IE No | Opera ? | Safari No | WebView Android No |
Chrome Android
56 — 80
Disabled
|
Firefox Android 55 | Opera Android ? | Safari iOS ? |
Samsung Internet Android
6.0
|
完整支持
不支持
兼容性未知
实验。期望将来行为有所改变。
弃用。不要用于新网站。
见实现注意事项。
用户必须明确启用此特征。