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Auto layers

Auto-layers are actually based on IntGrid layers with a twist: they have a Tileset linked to them and rules to paint tiles automatically.

Creating an IntGrid auto-layer

Step 1 – Create a Tileset

You can use the free tileset Cavernas from Adam Saltsman for your tests.

Open the TILESETS panel
Click CREATE TILESET
Import an IMAGE and adjust the GRID SIZE.

Step 2 – Create an IntGrid layer

Open the LAYERS panel
Create an INTGRID layer
Optionally, add some values
Select your TILESET in the AUTO PAINT section

Step 3 – Add some rules

Click on the new RULES button in the layer list on the left.
Create a new RULE GROUP
Create a new RULE in this group

Important

There are actually 2 types of auto-layers:

  • IntGrid layers with rules: just a normal IntGrid layer with a tileset attached, as shown above.
  • Pure auto-layers: this distinct layer type only contain rules, and takes its source data from another separate IntGrid layer. Pure auto-layers can be really useful if you want to render separate foreground and background layers using a single IntGrid source.

How rules work?

Here is the rule editor window:

Rules are grid patterns that will decide if a specific tile should be painted on your layer.

Here is a simple rule:

It says “Paint the tile on the left if” :

  1. in any given cell, there is a “collision” IntGrid value (white)
  2. AND there is no “collision” value above.

And here is another one:

This second one means: “Paint the tile on the left if any given grid cell contains a “collision” value“.

With these 2 rules, if you add collisions to your layer, the tiles will be drawn automatically:

If you press SHIFT+R or uncheck the Render option in the Rules panel, you will see the “pure” IntGrid layer, without the tiles:

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