Phaser是否渲染可见设置为false的精灵？

Question

Does Phaser render sprites with visible set to false?

I'm making a game much like Motherload but with infinite terrain. The terrain generates as you go along and is made of 64x64 sized sprites (tiles), as you can imagine as you go along alot of sprites are added to the scene. Sprites which go out of view have their visible property set to false however my frame rate (FPS) drops considerably as the player goes along and alot of terrain is generated. Why is this if only the sprites on screen have their visible property set to true? I have checked over and over again that only the sprites on screen have their visible property set to true and don't understand why my FPS drops so much as I go along, is Phaser still rendering these sprites with visible set to false?

Answer 1

Instead of constantly creating new Sprites and then .kill() ing them, you should be recycling Sprites.

Here's an example on Recycling.

It's the same technique used in Particle Effects (so that if a particle generator runs for infinity, it only creates a finite number of particles)

Here's the steps to use:

1. Create a number of sprites (probably 2x the size of your screen) in a Phaser.Group
2. render the initial scene (position, image) for each sprite
3. As a sprite moves off-screen (check in update using sprite.inCamera ) then .kill() it.
4. When it's time to draw a new sprite on the screen, use getFirstExists(false) to get a re-used sprite that's not visible .
5. update the sprite's image and position
6. tell the game to render the sprite using .revive()

And voila! You'll see a massive performance increase. (especially if you were trying to create 1,000s of sprites before)