[gd_scene load_steps=7 format=2]

[ext_resource path="res://scenes/HexTile3D.tscn" type="PackedScene" id=1]
[ext_resource path="res://scenes/HexGrid3DTest.gd" type="Script" id=2]
[ext_resource path="res://scenes/DebugCamera.gd" type="Script" id=3]

[sub_resource type="PlaneMesh" id=1]
size = Vector2( 50, 50 )

[sub_resource type="Shader" id=2]
code = "shader_type spatial;

uniform float beer_factor = 5.0;

void fragment() {
			// sample our depth buffer
		float depth = texture(DEPTH_TEXTURE, SCREEN_UV).r;
		
		// grab to values
		//depth = depth * 50.0 - 49.0;
		
		// unproject depth
		depth = depth * 2.0 - 1.0;
		float z = -PROJECTION_MATRIX[3][2] / (depth + PROJECTION_MATRIX[2][2]);
		// float x = (SCREEN_UV.x * 2.0 - 1.0) * z / PROJECTION_MATRIX[0][0];
		// float y = (SCREEN_UV.y * 2.0 - 1.0) * z / PROJECTION_MATRIX[1][1];
		float delta = -(z - VERTEX.z); // z is negative.
		// delta *= 0.1;
		
		// beers law
		float att = exp(-delta * beer_factor);
		
		ALPHA = clamp(1.0 - att, 0.0, 1.0);
	
	ALBEDO = vec3(0.0, 0.0, 0.05);
}"

[sub_resource type="ShaderMaterial" id=3]
shader = SubResource( 2 )
shader_param/beer_factor = 5.0

[node name="HexGrid3DTest" type="Spatial"]
script = ExtResource( 2 )

[node name="HexTile3D" parent="." instance=ExtResource( 1 )]
visible = false

[node name="Camera" type="Camera" parent="."]
transform = Transform( 1, 0, 0, 0, 0.511698, 0.859165, 0, -0.859165, 0.511698, -1.05655, 3.66248, 10.3074 )
fov = 60.0
script = ExtResource( 3 )

[node name="DirectionalLight" type="DirectionalLight" parent="."]
transform = Transform( 0.83729, 0.174005, 0.518332, -0.54676, 0.266466, 0.793757, 0, -0.948008, 0.318248, 0, 8.03448, 0 )
shadow_enabled = true
shadow_contact = 1.565

[node name="MeshInstance" type="MeshInstance" parent="."]
transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.568377, 0.0356998 )
mesh = SubResource( 1 )
material/0 = SubResource( 3 )