convert light system to shader

[ChaoticTechSupport]

hi, i made the currnet lighting system, but i am not good at writing shaders, and to create a proper ligthing system, it requires adding to the current light values wich is only possible via shaders, so if someone could convert the current solution to shader code (and maybe implement occolision lighting system via terrain) that would be great!.

[viktorpopp]

What about something like this:

extends Node2D

@export var tilemap: TileMap
@export var light_radius: float = 2.0
@export var darkness: float = 0.75
@export var cell_size: Vector2 = Vector2(16, 16)

var shader_material: ShaderMaterial

func _ready():
    shader_material = ShaderMaterial.new()
    shader_material.set_shader(load("res://LightShader.shader"))
    shader_material.set_shader_param("light_radius", light_radius)
    shader_material.set_shader_param("darkness", darkness)
    shader_material.set_shader_param("cell_size", cell_size)
    
    $lightingCanvas.material = shader_material

func _process(delta: float):
    var player_pos = global.player.position / cell_size
    shader_material.set_shader_param("light_position", player_pos)