Experimenting with noise based world generation

addons/gdhexgrid/HexShape.tscn

@@ -1,6 +1,6 @@
 [gd_scene load_steps=2 format=2]
 
-[ext_resource path="res://HexShape.gd" type="Script" id=1]
+[ext_resource path="res://addons/gdhexgrid/HexShape.gd" type="Script" id=1]
 
 [node name="Highlight" type="Polygon2D"]
 color = Color( 1, 1, 1, 0 )

addons/gdhexgrid/demo_3d.tscn

@@ -21,13 +21,13 @@ roughness = 0.0
 [sub_resource type="QuadMesh" id=5]
 size = Vector2( 2, 1 )
 
-[sub_resource type="ViewportTexture" id=6]
+[sub_resource type="ViewportTexture" id=12]
 viewport_path = NodePath("HexGrid/Highlight/Viewport")
 
 [sub_resource type="SpatialMaterial" id=7]
 resource_local_to_scene = true
 flags_transparent = true
-albedo_texture = SubResource( 6 )
+albedo_texture = SubResource( 12 )
 
 [sub_resource type="BoxShape" id=8]
 extents = Vector3( 4, 0.1, 2 )

doc/world.txt

@@ -0,0 +1,33 @@
+# Patch based world
+
+Per patch we have:
+
+  - tiles
+	- water plane
+	  - with clickable area
+
+A world consists of a fixed amount of tiles in x and y direction.
+
+Patches are used to stream the world in and out.
+
+# Cross-patch island generation:
+
+
+
+# Shaping under water tiles:
+
+for each tile of an island:
+  - create inside set I:
+	  - add all island tiles to I
+	- for steps i = 0, ..., n:
+	  - create empty rim sets RI and RN
+		- for all tiles in I:
+		  - for all neighbours of tile:
+			  - if neighbour not in I -> add tile to RI
+				- add tile to I
+
+		- for all tiles in RI:
+		  - get all neighbours of tile:
+			  - if neighbour not in I -> add neighbour to RN
+	  - for all neighbours not in I
+	- 

scenes/HexGrid3DTest.tscn

@@ -1,20 +1,11 @@
-[gd_scene load_steps=15 format=2]
+[gd_scene load_steps=17 format=2]
 
 [ext_resource path="res://entities/PlayerEntity.gd" type="Script" id=1]
 [ext_resource path="res://scenes/HexGrid3DTest.gd" type="Script" id=2]
 [ext_resource path="res://scenes/DebugCamera.gd" type="Script" id=3]
+[ext_resource path="res://scenes/NoiseWorld.gd" type="Script" id=4]
 [ext_resource path="res://assets/water_diffuse.png" type="Texture" id=5]
 [ext_resource path="res://components/MovableComponent.tscn" type="PackedScene" id=6]
-[ext_resource path="res://scenes/World.gd" type="Script" id=7]
-
-[sub_resource type="CapsuleMesh" id=4]
-radius = 0.2
-mid_height = 0.5
-radial_segments = 16
-
-[sub_resource type="CapsuleShape" id=5]
-radius = 0.25
-height = 0.5
 
 [sub_resource type="CylinderMesh" id=7]
 top_radius = 0.5
@@ -30,6 +21,7 @@ albedo_color = Color( 1, 1, 1, 0.407843 )
 roughness = 0.0
 
 [sub_resource type="PlaneMesh" id=1]
+size = Vector2( 1, 1 )
 subdivide_width = 24
 subdivide_depth = 24
 
@@ -122,10 +114,67 @@ shader_param/texture_scale = Vector2( 8, 8 )
 shader_param/texturemap = ExtResource( 5 )
 
 [sub_resource type="HeightMapShape" id=6]
+map_width = 1
+map_depth = 1
+map_data = PoolRealArray( 0 )
+
+[sub_resource type="OpenSimplexNoise" id=11]
+octaves = 1
+period = 101.6
+
+[sub_resource type="NoiseTexture" id=10]
+flags = 3
+width = 1024
+height = 1024
+seamless = true
+noise = SubResource( 11 )
+
+[sub_resource type="CapsuleMesh" id=4]
+radius = 0.2
+mid_height = 0.5
+radial_segments = 16
+
+[sub_resource type="CapsuleShape" id=5]
+radius = 0.25
+height = 0.5
 
 [node name="HexGrid3DTest" type="Spatial"]
 script = ExtResource( 2 )
 
+[node name="World" type="Spatial" parent="."]
+script = ExtResource( 4 )
+world_size = 100
+
+[node name="Scene" type="Spatial" parent="World"]
+
+[node name="Navigation" type="Spatial" parent="World"]
+
+[node name="Tiles" type="Spatial" parent="World"]
+
+[node name="Highlight" type="MeshInstance" parent="World"]
+transform = Transform( -1.62921e-07, 0, 1, 0, 1, 0, -1, 0, -1.62921e-07, 0, 0.2, 0 )
+cast_shadow = 0
+mesh = SubResource( 7 )
+material/0 = SubResource( 8 )
+
+[node name="Water" type="MeshInstance" parent="World"]
+transform = Transform( 50, 0, 0, 0, 50, 0, 0, 0, 50, 0, 0, 0 )
+cast_shadow = 0
+mesh = SubResource( 1 )
+skeleton = NodePath("../..")
+material/0 = SubResource( 3 )
+
+[node name="ClckArea" type="Area" parent="World"]
+transform = Transform( 50, 0, 0, 0, 50, 0, 0, 0, 50, 0, 0, 0 )
+
+[node name="CollisionShape" type="CollisionShape" parent="World/ClckArea"]
+transform = Transform( 2.5, 0, 0, 0, 1, 0, 0, 0, 2.5, 0, 0, 0 )
+shape = SubResource( 6 )
+
+[node name="Noise" type="Sprite" parent="World"]
+visible = false
+texture = SubResource( 10 )
+
 [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
@@ -192,35 +241,6 @@ shape = SubResource( 5 )
 [node name="Movable" parent="Player" instance=ExtResource( 6 )]
 max_speed = 3
 
-[node name="World" type="Spatial" parent="."]
-script = ExtResource( 7 )
-generate_flag = true
-
-[node name="Scene" type="Spatial" parent="World"]
-
-[node name="Navigation" type="Spatial" parent="World"]
-
-[node name="Tiles" type="Spatial" parent="World"]
-
-[node name="Highlight" type="MeshInstance" parent="World"]
-transform = Transform( -1.62921e-07, 0, 1, 0, 1, 0, -1, 0, -1.62921e-07, 0, 0.2, 0 )
-cast_shadow = 0
-mesh = SubResource( 7 )
-material/0 = SubResource( 8 )
-
-[node name="Water" type="MeshInstance" parent="World"]
-transform = Transform( 10, 0, 0, 0, 10, 0, 0, 0, 10, 0, -0.1, 0 )
-cast_shadow = 0
-mesh = SubResource( 1 )
-skeleton = NodePath("../..")
-material/0 = SubResource( 3 )
-
-[node name="ClckArea" type="Area" parent="World"]
-
-[node name="CollisionShape" type="CollisionShape" parent="World/ClckArea"]
-transform = Transform( 50, 0, 0, 0, 1, 0, 0, 0, 50, 0, 0, 0 )
-shape = SubResource( 6 )
-
 [connection signal="input_event" from="World/ClckArea" to="World" method="_on_ClckArea_input_event"]
 [connection signal="mouse_entered" from="World/ClckArea" to="World" method="_on_ClckArea_mouse_entered"]
 [connection signal="mouse_exited" from="World/ClckArea" to="World" method="_on_ClckArea_mouse_exited"]

scenes/HexShape.tscn

@@ -0,0 +1,48 @@
+[gd_scene load_steps=2 format=2]
+
+[ext_resource path="res://addons/gdhexgrid/HexShape.gd" type="Script" id=1]
+
+[node name="Highlight" type="MeshInstance"]
+script = ExtResource( 1 )
+
+[node name="Label" type="Label" parent="."]
+visible = false
+margin_left = 5.0
+margin_top = -39.0
+margin_right = 52.0
+margin_bottom = -25.0
+text = "SCREEN"
+__meta__ = {
+"_edit_use_anchors_": false
+}
+
+[node name="AreaCoords" type="Label" parent="."]
+visible = false
+margin_left = 55.0
+margin_top = -39.0
+margin_right = 105.0
+margin_bottom = -25.0
+text = "SCREEN"
+
+[node name="Label2" type="Label" parent="."]
+visible = false
+margin_left = 25.0
+margin_top = -19.0
+margin_right = 56.0
+margin_bottom = -5.0
+text = "HEX"
+__meta__ = {
+"_edit_use_anchors_": false
+}
+
+[node name="HexCoords" type="Label" parent="."]
+margin_left = -26.0
+margin_top = -8.0
+margin_right = 24.0
+margin_bottom = 6.0
+text = "HEX"
+align = 1
+valign = 1
+__meta__ = {
+"_edit_use_anchors_": false
+}

scenes/NoiseWorld.gd

@@ -0,0 +1,156 @@
+tool
+
+extends Spatial
+
+var GameTile = load("res://utils/GameTile.gd")
+var HexCell = preload("res://addons/gdhexgrid/HexCell.gd")
+onready var HexGrid = preload("res://addons/gdhexgrid/HexGrid.gd").new()
+var IslandGenerator = preload("res://utils/IslandGenerator.gd").new()
+onready var click_area = $ClckArea/CollisionShape
+onready var water = $Water
+onready var highlight = $Highlight
+onready var noise = $Noise
+onready var tiles = $Tiles
+
+var has_tiles_initialized = false
+var tile_map = {}
+var active_tile = null
+var island_count = 5
+
+export var world_size = 50 setget do_resize
+export var generate_flag: bool = false setget do_generate
+
+func _ready():
+	assert(get_node("Tiles") != null)
+
+	do_resize(world_size)
+	reset()
+	generate()
+	pass
+
+
+func _process(_delta):
+	pass
+
+
+func do_generate(_flag):
+	reset()
+#	generate()
+	generate_flag = false
+
+
+func do_resize(new_size):
+	print ("resizing world to size " + str (new_size))
+	
+	var water = $Water
+	if water == null:
+		return
+		
+	print ("water node: " + str(water))
+	water.transform = Transform.IDENTITY.scaled(Vector3(new_size, new_size, new_size) * 0.5)
+	
+	var click_area = $ClckArea
+	click_area.transform = water.transform
+	
+	world_size = new_size
+	return world_size
+
+func reset():
+	var tiles = get_node("Tiles")
+	if tiles == null:
+		return
+		
+	print ("clearing old tiles: " + str(tiles.get_child_count()))
+	for tile in tiles.get_children():
+		tiles.remove_child(tile)
+		tile.queue_free()
+	tile_map = {}
+
+
+func generate():
+	print ("generating world with size " + str(world_size))
+	reset()
+	generate_base_tiles()
+	apply_noise_as_height()
+
+
+func apply_noise_as_height():
+	var texture : Texture = noise.texture
+	yield(texture, "changed")
+	var noise = texture.get_data()
+	noise.lock()
+	
+	var vec1 = Vector2.ONE
+	vec1 = vec1 * Vector2(0.5, 0.2)
+	
+	for i in range (-world_size / 2, world_size / 2):
+		for j in range (-world_size / 2, world_size / 2):
+			var coord = Vector2(i,j)
+			var tile = tile_map[coord]
+			var tex_coord_normalized = (coord / world_size) * 0.5 + Vector2(0.5, 0.5)
+			var tex_coord = tex_coord_normalized * texture.get_size()
+#			-25 ... 25  -> 0 ... 1
+#			(coord / (size * 0.5)) * 0.5 + 0.5: -1 .. 1
+			var noise_value = texture.get_data().get_pixelv(tex_coord)
+			tile.transform.origin.y = noise_value[0] * 5.0 - 3
+	
+	noise.unlock()
+
+
+func generate_base_tiles():
+	for i in range (-world_size / 2, world_size / 2):
+		for j in range (-world_size / 2, world_size / 2):
+			var tile = GameTile.new()
+			tile.type = GameTile.TileType.Water
+			tile.offset_coords = Vector2(i,j)
+			
+			add_tile_for_hex(tile)
+
+
+func add_tile_for_hex(game_tile):
+	var hexgrid = preload("res://addons/gdhexgrid/HexGrid.gd").new()
+	var HexTile3D = preload("res://scenes/HexTile3D.tscn")
+	
+	var tile = HexTile3D.instance()
+	var pos = hexgrid.get_hex_center_from_offset(game_tile.offset_coords)	
+	var height = -2.0 # if game_tile.type == GameTile.TileType.Sand else 0.1 + rand_range(0.0, 0.05)
+
+	tiles.add_child(tile)
+	tile_map[game_tile.offset_coords] = tile
+
+	tile.set_tiletype(game_tile.type)
+	tile.transform.origin = Vector3(pos.x, height, pos.y)
+	tile.game_tile = game_tile
+	
+	return tile
+
+
+func _on_ClckArea_input_event(_camera, _event, position, _normal, _shape_idx):
+	var hex_at_position = HexGrid.get_hex_at(position)
+	var offset_coords = hex_at_position.offset_coords
+	var hex_center = HexGrid.get_hex_center_from_offset(offset_coords)
+	highlight.transform.origin = Vector3 (hex_center.x, 0.0, hex_center.y)
+	
+	var world_tile = null
+	if offset_coords in tile_map.keys():
+		world_tile = tile_map[offset_coords]
+	
+	if active_tile != null and world_tile != active_tile:
+		pass
+
+	if active_tile == world_tile:
+		return
+
+	if world_tile == null:
+		return
+
+	active_tile = world_tile
+
+
+func _on_ClckArea_mouse_entered():
+	highlight.visible = true
+
+
+func _on_ClckArea_mouse_exited():
+	highlight.visible = false
+

scenes/NoiseWorld.tscn

@@ -0,0 +1,144 @@
+[gd_scene load_steps=9 format=2]
+
+[ext_resource path="res://scenes/NoiseWorld.gd" type="Script" id=1]
+[ext_resource path="res://assets/water_diffuse.png" type="Texture" id=2]
+
+[sub_resource type="CylinderMesh" id=7]
+top_radius = 0.5
+bottom_radius = 0.5
+height = 0.1
+radial_segments = 6
+rings = 1
+
+[sub_resource type="SpatialMaterial" id=8]
+render_priority = 1
+flags_transparent = true
+albedo_color = Color( 1, 1, 1, 0.407843 )
+roughness = 0.0
+
+[sub_resource type="PlaneMesh" id=1]
+subdivide_width = 24
+subdivide_depth = 24
+
+[sub_resource type="Shader" id=2]
+code = "shader_type spatial;
+
+uniform vec2 amplitude = vec2(0.01, 0.05);
+uniform vec2 frequency = vec2(3.0, 2.5);
+uniform vec2 time_factor = vec2(2.0, 3.0);
+
+uniform float beer_factor = 100.01;
+uniform float refraction = 0.05;
+
+uniform sampler2D uv_offset_texture : hint_black;
+uniform vec2 uv_offset_scale = vec2(0.2, 0.2);
+uniform float uv_offset_time_scale = 0.01;
+uniform float uv_offset_amplitude = 0.2;
+
+uniform sampler2D texturemap : hint_albedo;
+uniform vec2 texture_scale = vec2(8.0, 4.0);
+
+float height(vec2 pos, float time) {
+	return (amplitude.x * sin(pos.x * frequency.x + time * time_factor.x)) + (amplitude.y * sin(pos.y * frequency.y + time * time_factor.y));
+}
+
+void vertex() {
+	VERTEX.y += height(VERTEX.xz, TIME); // sample the height at the location of our vertex
+	TANGENT = normalize(vec3(0.0, height(VERTEX.xz + vec2(0.0, 0.2), TIME) - height(VERTEX.xz + vec2(0.0, -0.2), TIME), 0.4));
+	BINORMAL = normalize(vec3(0.4, height(VERTEX.xz + vec2(0.2, 0.0), TIME) - height(VERTEX.xz + vec2(-0.2, 0.0), TIME ), 0.0));
+	NORMAL = cross(TANGENT, BINORMAL);
+}
+
+void fragment() {
+	vec2 base_uv_offset = UV * uv_offset_scale; // Determine the UV that we use to look up our DuDv
+	base_uv_offset += TIME * uv_offset_time_scale;
+	
+	vec2 texture_based_offset = texture(uv_offset_texture, base_uv_offset).rg; // Get our offset
+	texture_based_offset = texture_based_offset * 2.0 - 1.0; // Convert from 0.0 <=> 1.0 to -1.0 <=> 1.0
+	
+	vec2 texture_uv = UV * texture_scale;
+	texture_uv += uv_offset_amplitude * texture_based_offset;
+	ALBEDO = texture(texturemap, texture_uv).rgb * 0.5;
+	METALLIC = 0.0;
+	ROUGHNESS = 0.5;
+	//NORMALMAP = texture(normalmap, base_uv_offset).rgb;
+	//NORMALMAP_DEPTH = 0.2;
+	
+	if (ALBEDO.r > 0.9 && ALBEDO.g > 0.9 && ALBEDO.b > 0.9) {
+		ALPHA = 0.9;
+	} else {
+		// 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);
+	}
+	
+	vec3 ref_normal = normalize( mix(NORMAL,TANGENT * NORMALMAP.x + BINORMAL * NORMALMAP.y + NORMAL * NORMALMAP.z,NORMALMAP_DEPTH) );
+	vec2 ref_ofs = SCREEN_UV - ref_normal.xy * refraction;
+	EMISSION += textureLod(SCREEN_TEXTURE,ref_ofs,ROUGHNESS * 2.0).rgb * (1.0 - ALPHA);
+	
+	ALBEDO *= ALPHA;
+	ALPHA = 1.0;	
+}"
+
+[sub_resource type="ShaderMaterial" id=3]
+shader = SubResource( 2 )
+shader_param/amplitude = Vector2( 0.005, 0.005 )
+shader_param/frequency = Vector2( 50, 48 )
+shader_param/time_factor = Vector2( 7, 8 )
+shader_param/beer_factor = 2.0
+shader_param/refraction = 0.001
+shader_param/uv_offset_scale = Vector2( 0.2, 0.2 )
+shader_param/uv_offset_time_scale = 0.1
+shader_param/uv_offset_amplitude = 1.2
+shader_param/texture_scale = Vector2( 8, 8 )
+shader_param/texturemap = ExtResource( 2 )
+
+[sub_resource type="HeightMapShape" id=6]
+
+[node name="World" type="Spatial"]
+script = ExtResource( 1 )
+size = Vector2( 20, 3 )
+
+[node name="Scene" type="Spatial" parent="."]
+
+[node name="Navigation" type="Spatial" parent="."]
+
+[node name="Tiles" type="Spatial" parent="."]
+
+[node name="Highlight" type="MeshInstance" parent="."]
+transform = Transform( -1.62921e-07, 0, 1, 0, 1, 0, -1, 0, -1.62921e-07, 0, 0.2, 0 )
+cast_shadow = 0
+mesh = SubResource( 7 )
+material/0 = SubResource( 8 )
+
+[node name="Water" type="MeshInstance" parent="."]
+transform = Transform( 10, 0, 0, 0, 10, 0, 0, 0, 10, 0, -0.1, 0 )
+cast_shadow = 0
+mesh = SubResource( 1 )
+skeleton = NodePath("../..")
+material/0 = SubResource( 3 )
+
+[node name="ClckArea" type="Area" parent="."]
+
+[node name="CollisionShape" type="CollisionShape" parent="ClckArea"]
+transform = Transform( 50, 0, 0, 0, 1, 0, 0, 0, 50, 0, 0, 0 )
+shape = SubResource( 6 )
+
+[connection signal="input_event" from="ClckArea" to="." method="_on_ClckArea_input_event"]
+[connection signal="mouse_entered" from="ClckArea" to="." method="_on_ClckArea_mouse_entered"]
+[connection signal="mouse_exited" from="ClckArea" to="." method="_on_ClckArea_mouse_exited"]

scenes/RandomWalkWorld.gd

@@ -63,10 +63,10 @@ func generate():
 			))
 	
 	mark_sand_tiles()
-	smooth_water_tiles()
+#	smooth_water_tiles()
-	smooth_water_tiles()
+#	smooth_water_tiles()
-	smooth_water_tiles()
+#	smooth_water_tiles()
-	smooth_water_tiles()	
+#	smooth_water_tiles()	
 
 
 func generate_base_tiles():

scenes/RandomWalkWorld.tscn

@@ -0,0 +1,144 @@
+[gd_scene load_steps=9 format=2]
+
+[ext_resource path="res://scenes/World.gd" type="Script" id=1]
+[ext_resource path="res://assets/water_diffuse.png" type="Texture" id=2]
+
+[sub_resource type="CylinderMesh" id=7]
+top_radius = 0.5
+bottom_radius = 0.5
+height = 0.1
+radial_segments = 6
+rings = 1
+
+[sub_resource type="SpatialMaterial" id=8]
+render_priority = 1
+flags_transparent = true
+albedo_color = Color( 1, 1, 1, 0.407843 )
+roughness = 0.0
+
+[sub_resource type="PlaneMesh" id=1]
+subdivide_width = 24
+subdivide_depth = 24
+
+[sub_resource type="Shader" id=2]
+code = "shader_type spatial;
+
+uniform vec2 amplitude = vec2(0.01, 0.05);
+uniform vec2 frequency = vec2(3.0, 2.5);
+uniform vec2 time_factor = vec2(2.0, 3.0);
+
+uniform float beer_factor = 100.01;
+uniform float refraction = 0.05;
+
+uniform sampler2D uv_offset_texture : hint_black;
+uniform vec2 uv_offset_scale = vec2(0.2, 0.2);
+uniform float uv_offset_time_scale = 0.01;
+uniform float uv_offset_amplitude = 0.2;
+
+uniform sampler2D texturemap : hint_albedo;
+uniform vec2 texture_scale = vec2(8.0, 4.0);
+
+float height(vec2 pos, float time) {
+	return (amplitude.x * sin(pos.x * frequency.x + time * time_factor.x)) + (amplitude.y * sin(pos.y * frequency.y + time * time_factor.y));
+}
+
+void vertex() {
+	VERTEX.y += height(VERTEX.xz, TIME); // sample the height at the location of our vertex
+	TANGENT = normalize(vec3(0.0, height(VERTEX.xz + vec2(0.0, 0.2), TIME) - height(VERTEX.xz + vec2(0.0, -0.2), TIME), 0.4));
+	BINORMAL = normalize(vec3(0.4, height(VERTEX.xz + vec2(0.2, 0.0), TIME) - height(VERTEX.xz + vec2(-0.2, 0.0), TIME ), 0.0));
+	NORMAL = cross(TANGENT, BINORMAL);
+}
+
+void fragment() {
+	vec2 base_uv_offset = UV * uv_offset_scale; // Determine the UV that we use to look up our DuDv
+	base_uv_offset += TIME * uv_offset_time_scale;
+	
+	vec2 texture_based_offset = texture(uv_offset_texture, base_uv_offset).rg; // Get our offset
+	texture_based_offset = texture_based_offset * 2.0 - 1.0; // Convert from 0.0 <=> 1.0 to -1.0 <=> 1.0
+	
+	vec2 texture_uv = UV * texture_scale;
+	texture_uv += uv_offset_amplitude * texture_based_offset;
+	ALBEDO = texture(texturemap, texture_uv).rgb * 0.5;
+	METALLIC = 0.0;
+	ROUGHNESS = 0.5;
+	//NORMALMAP = texture(normalmap, base_uv_offset).rgb;
+	//NORMALMAP_DEPTH = 0.2;
+	
+	if (ALBEDO.r > 0.9 && ALBEDO.g > 0.9 && ALBEDO.b > 0.9) {
+		ALPHA = 0.9;
+	} else {
+		// 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);
+	}
+	
+	vec3 ref_normal = normalize( mix(NORMAL,TANGENT * NORMALMAP.x + BINORMAL * NORMALMAP.y + NORMAL * NORMALMAP.z,NORMALMAP_DEPTH) );
+	vec2 ref_ofs = SCREEN_UV - ref_normal.xy * refraction;
+	EMISSION += textureLod(SCREEN_TEXTURE,ref_ofs,ROUGHNESS * 2.0).rgb * (1.0 - ALPHA);
+	
+	ALBEDO *= ALPHA;
+	ALPHA = 1.0;	
+}"
+
+[sub_resource type="ShaderMaterial" id=3]
+shader = SubResource( 2 )
+shader_param/amplitude = Vector2( 0.005, 0.005 )
+shader_param/frequency = Vector2( 50, 48 )
+shader_param/time_factor = Vector2( 7, 8 )
+shader_param/beer_factor = 2.0
+shader_param/refraction = 0.001
+shader_param/uv_offset_scale = Vector2( 0.2, 0.2 )
+shader_param/uv_offset_time_scale = 0.1
+shader_param/uv_offset_amplitude = 1.2
+shader_param/texture_scale = Vector2( 8, 8 )
+shader_param/texturemap = ExtResource( 2 )
+
+[sub_resource type="HeightMapShape" id=6]
+
+[node name="World" type="Spatial"]
+script = ExtResource( 1 )
+generate_flag = true
+
+[node name="Scene" type="Spatial" parent="."]
+
+[node name="Navigation" type="Spatial" parent="."]
+
+[node name="Tiles" type="Spatial" parent="."]
+
+[node name="Highlight" type="MeshInstance" parent="."]
+transform = Transform( -1.62921e-07, 0, 1, 0, 1, 0, -1, 0, -1.62921e-07, 0, 0.2, 0 )
+cast_shadow = 0
+mesh = SubResource( 7 )
+material/0 = SubResource( 8 )
+
+[node name="Water" type="MeshInstance" parent="."]
+transform = Transform( 10, 0, 0, 0, 10, 0, 0, 0, 10, 0, -0.1, 0 )
+cast_shadow = 0
+mesh = SubResource( 1 )
+skeleton = NodePath("../..")
+material/0 = SubResource( 3 )
+
+[node name="ClckArea" type="Area" parent="."]
+
+[node name="CollisionShape" type="CollisionShape" parent="ClckArea"]
+transform = Transform( 50, 0, 0, 0, 1, 0, 0, 0, 50, 0, 0, 0 )
+shape = SubResource( 6 )
+
+[connection signal="input_event" from="ClckArea" to="." method="_on_ClckArea_input_event"]
+[connection signal="mouse_entered" from="ClckArea" to="." method="_on_ClckArea_mouse_entered"]
+[connection signal="mouse_exited" from="ClckArea" to="." method="_on_ClckArea_mouse_exited"]