Assets Management

In Phaser Editor we encourage to use the Asset Pack JSON Format to load the assets of your games, it allow a better organization and comprehension of the assets and we provide many features around this file, specially the scene maker.

The asset pack

In the Phaser repository there is the file resources/Asset Pack JSON Format/assetPack.json. It is an example of how the assets can be loaded via the asset pack. We reproduce here the Phaser’s authors explanation of that file:

An Asset Pack is a means to control the loading of assets into Phaser via a JSON file. Use Phaser.Loader.pack() to load your data file.

The file is split into sections (…) Sections are a way for you to control the splitting-up of asset loading, so you don’t have to load everything at once.

The key you use for the sections is entirely up to you and is passed to the Phaser.Loader.pack call.

Within each section is an Array of objects. Each object corresponds to a single file to be loaded. The “type” property controls the type of file. Note that lots of the file properties are optional. See the Phaser.Loader API Documentation to find out which ones, as they match the API calls exactly.

Where a file type has a callback, such as “script”, the context in which the callback is run should be passed to the Phaser.Loader.pack method. See the examples for further details.

Create the pack file

If you create a project based on the built-in Phaser Editor templates then this file is created automatically. You can find it in the WebContent/assets/assets-pack.json path.

To create the pack file manually, go to File > New > Asset Pack File:

Asset pack file menu

It opens the Asset Pack File wizard. In this wizard you should write the name of the file and select the folder where to create the pack. By default, it selects the assets folder, but you can select any folder in any project. Press Finish to create the file and it opens in the Asset Pack editor.

Asset pack wizard

The pack file editor

The Asset Pack file is a JSON file that you can edit manually, but in Phaser Editor this file can be modified using a dedicated editor with a graphical interface.

The editor has two panels: the assets tree and the asset details.

In the assets tree you add, remove and rename the sections and the entries. The asset details panel shows the properties of the object selected in the tree.

To modify an asset entry, you select it in the tree and change the values in the details panel.

The details panel also shows the JSDoc of the different parameters, it is the same doc of the parameters of the loader method.

For example, if you select an “image” object in the tree, the details panel shows the parameters of the Phaser.Loader.image() method. You can modify the values of the parameters and you can see the documentation of it (hover the mouse in the parameter’s name).

Asset pack editor

Load the assets from the pack file

In Phaser the asstes are loaded in the preload method of the game state. The code to load them looks like this:

game.load.image("dino", "path/to/dino.png");
game.load.image("montain", "path/to/montain.png");
game.load.spritesheet("girl", "path/to/mujer-trotando.png", 64, 64);"music", "path/to/guajira.ogg");

For each asset to load you have to write a loader’s method call.

When you use an asset pack you only have to write a line to load a section from the asset pack:

game.load.pack("level", "path/to/assets-pack.json");

It automatically loads all the assets defined in the "level" section of the pack assets-pack.json.

Assets explorer

The Assets explorer is a key tool in Phaser Editor. It allows the user to navigate, preview, use and refactor the assets in a friendly way.

Quick preview of the assets

Many of the items in the Assets window can be quickly previewed: audio entries, videos, images, textures and Canvas (visual editor) files. Just hover the mouse on top of the element and a quick popup will show you the preview. Or drag the item and drop it in the Preview window.

The icons and preview images of the assets are computed in a background process that is tiggered each time the assets change. Check the Troubleshooting section below, there is explained how to fix some glitches related to assets.

Add objects to a Canvas scene

In addition to the assets of the pack files, the Assets window show the visual scenes and prefabs (Canvas files). These files can be dragged from the Assets window and dropped into an open visual editor to create new objects.

Assets refactoring

A nice new feature in Phaser Editor is the refactoring tools. These tools allow the user to change asset names, delete asset entries or replace asset textures by executing safe operations that can be undone.

Delete an asset

To delete an asset entry right-click on it and select the Refactoring > Delete option. Please remember that an asset entry is just a definition, an entry, in the asset pack file. By deleting an asset entry you only are modifing the pack.json file, the real file, like an image, is not touched.

Delete asset menu

Note that some elements shown in the Assets view cannot be deleted. For example you cannot delete a frame of a texture atlas, you only can delete a complete texture atlas.

After select the option to delete an asset, it opens a confirmation dialog with the option of preview the list of files that will be affected by the deletion.

Preview the affected files

Rename asset

The process of rename an asset is pretty similar to the process of delete it. A confirmation dialog is opened and the user can preview the affected files. The main difference is that if the user confirms the operation, then all the Canvas files will be updated to use the new name.

Move asset

Assets can be moved from one section to other. Just follow the same process of the rename, in the context menu select the Refactoring > Move option. It shows a dialog to select the new section for the asset and the option to preview the affected files. This operation can be undone and updates all the affected files so it does not introduce errors.

Global replace texture

This is a very useful operation and consists on replace certain texture (represented by an asset in the pack file) in all the objects of all the scenes of the project. These are the steps:

  • Select the texture you want to replace. For example a demo texture that you want to replace for the final terxture.
Asset replace menu
  • Select the texture replacement and confirm.
Select the new texture

All the objects that used flor as texture will be modified to use the texture zombi-head.


If you find that your assets are in an invalid state or you see a strange behavior then to fix it you can try by cleaning the projects.

Internally Phaser Editor uses a memory model with all the assets and its properties. This memory model should be synchronized with the physical and real data, but it happens that sometime because external changes or maybe bugs, the memory model is not in synchronization with the physical one. In this case, the best is to force the editor to create the memory model from scratch.

To do this select in the main menu the option Project > Clean..., it opens a dialog with the list of your projects. Select those you want to re-build and press the OK button. After this operation all the visual editors and views should be updated to show the new fresh/fixed data.

Clean projects.

If the strange behavior continues please open an issue.