Time elapsed since last frame

[Smrdis]

Phaser provide few variants how to calc time elapsed since last frame, like game.time.elapsed or this.game.time.elapsedSince ect. But all that variants works badly %). 

 

 

For example, I want create moving sprite. It should be smooth and moving speed should not depend on device performance. 

 

Here simple code example:

private mySprite : Phaser.Sprite;private update(): void{    var dt : number = this.game.time.elapsed;    this.mySprite.x += dt * speed_const;}

For some reason mySprite moving speed depends on FPS. If FPS drops down mySprite moves faster. So game.time.elapsed contain wrong value %). 

 

Another way:

private mySprite : Phaser.Sprite;private lastTime : number = 0;private update() : void{        var tm : number = this.game.time.totalElapsedSeconds();    var dt: number = tm - this.lastTime;    this.lastTime = tm;    this.mySprite.x += dt * speed_const;}

mySprite moving speed does not depend on FPS, but mySprite moves jerkily because sometime dt == 0.

 

[Dennis]

have you try this.game.time.physicsElapsed

[Smrdis]

As I understand physicsElapsed is just constant.

 

this.desiredFps = 60;

this.physicsElapsed = 1 / this.desiredFps;

[rich]

You're trying to implement a delta timer system on-top of an already delta-timed logic update game loop (that is why physicsElapsed is a constant, as the game loop is regulated already).

[Smrdis]

Thanks, Rich.