2.3 KiB
Terrain
Your player and NPCs walk along a defined terrain. You'll need a NavigationPolygon2D
for that, and attaching a script for special features like scaling and lighting.
Note that lighting on the terrain is not the same as lighting by Light2D, it is modulating
the player and items based on a separate texture. You'll make it white and color in the areas
where you want something to change.
A terrain is not strictly necessary. In rooms like that, all interactions are handled as if the player had already walked to the target position.
Scaling
Scalenodes
The easiest way to make your player and NPCs scale is to use the terrain_scalenodes.gd
script. Then you create Position2D nodes with scalenode.gd attached to them.
The names of these nodes don't matter, except you need scale_min and scale_max.
Those two should be placed above and below the navpoly.
Anything which is set to scale from the map will linear-interpolate between the target_scale
values.
Caveat: although these are tool scripts, you can't refresh the scalenode list at the
moment so you will need to refresh the scene when making bigger changes.
Gradient
The harder, though more versatile way, is to create a separate scalemap texture.
This is further documented in the Flossmanuals booklight.
Attach terrain.gd.
You'll define a scale range for how much to scale by. The terrain will look for the blue value of a pixel and scale accordingly. More blue is a bigger scale.
Caveat: for some reason this method is currently very slow, so having many NPCs move around will probably kill performance.
Lighting by lightmap
Reading pixels is, for whatever reason, slow. It is necessary for lightmaps, and scalemaps
if you use them. To mitigate the performance problems, there's a script lightmap_area.gd
which you would attach to an Area2D and draw its polygon or shape around the part of
your lightmap that actually contains information.
Dynamic navigation
You can attach nav_poly_instance.gd to multiple NavigationPolygonInstances, give
them global_ids and use set_active to toggle where you're allowed to move.
Note that you should use pixel snapping or somesuch to share vertices between the polygons or they are not considered the same terrain.