The height of bullets varies by ±1px

[bodqhrohro]

When the sprite tracked by weapon moves up and down, bullets generated on some heights are made one pixel taller or lower. See screenshot:

Initialization code:

		this.scrolls = game.add.weapon(40, 'lvl1', 'scroll')
		this.scrolls.bulletKillType = Phaser.Weapon.KILL_WORLD_BOUNDS
		this.scrolls.bulletSpeed = 50
		this.scrolls.fireRate = 10
		this.scrolls.fireAngle = 0

		this.scrolls.trackSprite(this.spike, 13, 5)

I've checked if fireFrom position is somehow made fractional but logging shows it remains integer. The bulletAngleVariance property is set to zero by default. What another can cause such behavior?

[bapho]

How about the movement of the player? The XY movement could be at a fraction of a pixel.

[bodqhrohro]

I've logged the player coordinates and they remain integer too.