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Stats.js
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Stats.js
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import StatsJs from 'stats.js'
export default class Stats
{
constructor(_active)
{
this.instance = new StatsJs()
this.instance.showPanel(3)
this.active = false
if(_active)
{
this.activate()
}
}
activate()
{
this.active = true
document.body.appendChild(this.instance.dom)
}
deactivate()
{
this.active = false
document.body.removeChild(this.instance.dom)
}
setRenderPanel(_context)
{
this.render = {}
this.render.context = _context
this.render.extension = this.render.context.getExtension('EXT_disjoint_timer_query_webgl2')
this.render.panel = this.instance.addPanel(new StatsJs.Panel('Render (ms)', '#f8f', '#212'))
this.render.maxValue = 40
}
beforeRender()
{
// Setup
this.queryCreated = false
let queryResultAvailable = false
// Test if query result available
if(this.render.query)
{
queryResultAvailable = this.render.context.getQueryParameter(this.render.query, this.render.context.QUERY_RESULT_AVAILABLE)
if(queryResultAvailable)
{
const elapsedNanos = this.render.context.getQueryParameter(this.render.query, this.render.context.QUERY_RESULT)
const panelValue = Math.min(elapsedNanos / 1000 / 1000, this.render.maxValue)
this.render.panel.update(panelValue, this.render.maxValue)
}
}
// If query result available or no query yet
if(queryResultAvailable || !this.render.query)
{
// Create new query
this.queryCreated = true
this.render.query = this.render.context.createQuery()
this.render.context.beginQuery(this.render.extension.TIME_ELAPSED_EXT, this.render.query)
}
}
afterRender()
{
// End the query (result will be available "later")
if(this.queryCreated)
{
this.render.context.endQuery(this.render.extension.TIME_ELAPSED_EXT)
}
}
update()
{
if(!this.active)
{
return
}
this.instance.update()
}
}