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Using perf.now and tidying it all up.

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This commit is contained in:
photonstorm 2017-04-28 03:14:30 +01:00
parent 4d142ad026
commit 119ae11736
1 changed files with 11 additions and 21 deletions
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32
v3/src/boot/VariableTimeStep.js
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@ -10,6 +10,7 @@ var VariableTimeStep = function (game, framerate)
this.started = false;
this.running = false;
// For fixed-step physics
this.fps = framerate;
this.callback = NOOP;
@ -30,11 +31,6 @@ VariableTimeStep.prototype.constructor = VariableTimeStep;
VariableTimeStep.prototype = {
toString: function ()
{
return 'time: ' + this.time + ' delta: ' + this.delta;
},
start: function (useRAF, callback)
{
if (this.started)
@ -45,9 +41,11 @@ VariableTimeStep.prototype = {
this.started = true;
this.running = true;
this.time = Date.now();
this.startTime = Date.now();
this.lastTime = Date.now();
var now = window.performance.now();
this.time = now;
this.startTime = now;
this.lastTime = now;
// Pre-populate smoothing array
@ -83,7 +81,7 @@ VariableTimeStep.prototype = {
// clamp delta to 0.0001 to 0.5 range
dt = Math.max(Math.min(dt, 0.5), 0.0001);
// Smooth out the delta over the previous 10 frames
// Smooth out the delta over the previous X frames
var idx = this.deltaIndex;
var history = this.deltaHistory;
@ -99,7 +97,7 @@ VariableTimeStep.prototype = {
// average
var avg = 0;
// Loop the array, adding the delta values together
// Loop the history array, adding the delta values together
for (var i = 0; i < max; i++)
{
avg += history[i];
@ -120,10 +118,9 @@ VariableTimeStep.prototype = {
this.lastTime = time;
},
/*
tick: function ()
{
this.step(true);
this.step(window.performance.now());
},
sleep: function ()
@ -144,25 +141,19 @@ VariableTimeStep.prototype = {
}
else if (seamless)
{
this.startTime += -this.lastUpdate + (this.lastUpdate = Date.now());
}
else if (this.frame > 10)
{
this.lastUpdate = Date.now() - this.lagThreshold + 5;
this.startTime += -this.lastTime + (this.lastTime = window.performance.now());
}
this.raf.start(this.step.bind(this), this.useRAF);
this.running = true;
this.step(true);
this.step(window.performance.now());
},
setFps: function (value)
{
this.fps = value;
this.gap = 1 / (value || 60);
this.nextTime = this.time + this.gap;
this.wake();
},
@ -171,7 +162,6 @@ VariableTimeStep.prototype = {
{
return this.fps;
},
*/
stop: function ()
{