51 lines
1.8 KiB
JavaScript
51 lines
1.8 KiB
JavaScript
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/*
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* ## requestAnimationFrameXR
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*
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* reroutes requestAnimationFrame-calls to xrSession.requestAnimationFrame
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* reason: in immersive mode this function behaves differently
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* (causing HTML apps like xterm.js not getting updated due to relying
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* on window.requestAnimationFrame)
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*
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* ```html
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* <a-entity requestAnimationFrameXR dom/>
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* ```
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*/
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if( !AFRAME.systems.requestAnimationFrameXR ){
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AFRAME.registerSystem('requestAnimationFrameXR',{
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init: function init(){
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if( document.location.hostname.match(/localhost/) ) return // allow webxr polyfill during development (they hang in XR)
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AFRAME.systems.requestAnimationFrameXR.q = []
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this.sceneEl.addEventListener('enter-vr', this.enable )
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this.sceneEl.addEventListener('enter-ar', this.enable )
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this.sceneEl.addEventListener('exit-vr', this.disable )
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this.sceneEl.addEventListener('exit-ar', this.disable )
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},
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enable: function enable(){
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this.requestAnimationFrame = window.requestAnimationFrame
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// NOTE: we don't call xrSession.requestAnimationFrame directly like this:
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//
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// window.requestAnimationFrame = AFRAME.utils.throttleTick( (cb) => this.sceneEl.xrSession.requestAnimationFrame(cb), 50 )
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//
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// as that breaks webxr polyfill (for in-browser testing)
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// instead we defer calls to tick() (which is called both in XR and non-XR)
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//
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window.requestAnimationFrame = (cb) => AFRAME.systems.requestAnimationFrameXR.q.push(cb)
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const q = AFRAME.systems.requestAnimationFrameXR.q
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this.tick = AFRAME.utils.throttleTick( () => {
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while( q.length != 0 ) (q.pop())()
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},50)
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},
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disable: function disable(){
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delete this.tick
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window.requestAnimationFrame = this.requestAnimationFrame
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}
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})
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}
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