Sprite inheritance problem

[Elad Sofer]

Hi,

 

I have looked at the examples and i guess i am missing something... i am adding as much info as i have even most of it is probably irrelevant. Sorry for that,

 

I have the BasicGame class which has 4 states in different files (as shown in example): 

game.state.add('Boot', BasicGame.Boot);game.state.add('Preloader', BasicGame.Preloader);game.state.add('MainMenu', BasicGame.MainMenu);game.state.add('Game', BasicGame.Game);

I have also created a new class called BasicGame.Lizard which inherits from sprite exactly as explained in the examples

BasicGame.Lizard= function (game) {   Phaser.Sprite.call(this,game, 110, 350, 'lizard');};BasicGame.Lizard.prototype = Object.create(Phaser.Sprite.prototype);BasicGame.Lizard.prototype.constructor = BasicGame.Lizard;BasicGame.Lizard.prototype = { .... }

On the create function in BasicGame.Game i try to create a new Lizard :

this.lizard = new BasicGame.Lizard(this);

And get an "Uncaught TypeError: undefined is not a function " which is coming from this call stack.

 

1. PIXI.Sprite - phaser.js:1714 - (this.onTextureUpdate()
2. Phaser.Sprite- phaser.js:26375 - (PIXI.Sprite.call(this, PIXI.TextureCache['__default'])
3. BasicGame.Lizard- lizard.js:4 - (Phaser.Sprite.call(this,game, 110, 350, 'lizard')

 

 

Thanks in advance for any help,

Elad.

[ctmartinez1992]

I'm not sure if the way you did is an alternative to what i do but, to add a sprite i do like thus:

game.add.sprite(110, 350, 'lizard');

The way you're doing might work but i have never seen anyone do it like that.

[Dream Of Sleeping]

BasicGame.Lizard.prototype = { .... } // remove this

 

Javascript inherritence is confusing so I may be wrong but I think that's the problem. You had set it's prototype to be a sprite, but then you just changed it.  If you want to add new functions to your Lizard object do this.

 

BasicGame.Lizard.prototype.anotherFunction = function() {

 

}

[ctmartinez1992]

Oh, he actually has that in the code? I assumed it was to show that the rest of the code was irrelevant

[Dream Of Sleeping]

Well I assumed the prototype contains stuff and I realize that the {... } was to show that it's not important. But I thought if you were to create a prototype like that (including new variables and stuff) it would replace sprite as the prototype, therefore undoing the inherritence. But I totally could be wrong.

[Dream Of Sleeping]

Also here. this.lizard = new BasicGame.Lizard(this); What is 'this' you are passing it. Is it the state? Because you need to pass it the game instance. You sould try this this.lizard = new BasicGame.Lizard(this.game)

[ctmartinez1992]

Or you're correct and i'm a dumbass because i forgot that he is doing inheritance

Carry on...

[Elad Sofer]

Dream of Sleeping thanks a lot! 

The issue was with the way i implemented the inheritance.