playcanvas/build/playcanvas.dbg/src/extras/mini-stats/stats-timer.js

PlayCanvas WebGL game engine

// Stats timer interface for graph
class StatsTimer {
    constructor(app, statNames, decimalPlaces, unitsName, multiplier){
        this.app = app;
        this.values = [];
        // supporting up to 3 stats
        this.statNames = statNames;
        if (this.statNames.length > 3) {
            this.statNames.length = 3;
        }
        this.unitsName = unitsName;
        this.decimalPlaces = decimalPlaces;
        this.multiplier = multiplier || 1;
        // recursively look up properties of objects specified in a string
        const resolve = (path, obj)=>{
            return path.split('.').reduce((prev, curr)=>{
                return prev ? prev[curr] : null;
            }, obj || this);
        };
        app.on('frameupdate', (ms)=>{
            for(let i = 0; i < this.statNames.length; i++){
                // read specified stat from app.stats object
                this.values[i] = resolve(this.statNames[i], this.app.stats) * this.multiplier;
            }
        });
    }
    get timings() {
        return this.values;
    }
}

export { StatsTimer };