Terrain textures + province colour alpha channel

7 files changed, 44 insertions, 30 deletions

diff --git a/game/src/Autoload/Events.gd b/game/src/Autoload/Events.gd
index f94d338..47c3b88 100644
--- a/game/src/Autoload/Events.gd
+++ b/game/src/Autoload/Events.gd
@@ -8,7 +8,9 @@ var ShaderManager = preload("Events/ShaderManager.gd").new()
 const _province_identifier_file : String = "res://common/map/provinces.json"
 const _water_province_file : String = "res://common/map/water.json"
 const _region_file : String = "res://common/map/regions.json"
-const _province_shape_file : String = "res://common/map/provinces.png"
+const _terrain_file : String = "res://common/map/terrain.json"
+const _province_image_file : String = "res://common/map/provinces.png"
+const _terrain_image_file : String = "res://common/map/terrain.png"
 
 # REQUIREMENTS
 # * FS-333, FS-334, FS-335, FS-341
@@ -19,5 +21,7 @@ func _ready():
 		push_error("Failed to load water provinces")
 	if GameSingleton.load_region_file(_region_file) != OK:
 		push_error("Failed to load regions")
-	if GameSingleton.load_province_shape_file(_province_shape_file) != OK:
-		push_error("Failed to load province shapes")
+	if GameSingleton.load_terrain_file(_terrain_file) != OK:
+		push_error("Failed to load terrain variants")
+	if GameSingleton.load_map_images(_province_image_file, _terrain_image_file) != OK:
+		push_error("Failed to load map images")
diff --git a/game/src/Autoload/Events/ShaderManager.gd b/game/src/Autoload/Events/ShaderManager.gd
index 96ed5b4..a503c52 100644
--- a/game/src/Autoload/Events/ShaderManager.gd
+++ b/game/src/Autoload/Events/ShaderManager.gd
@@ -1,13 +1,14 @@
 extends RefCounted
 
-const param_province_shape : StringName = &"province_shape_tex"
+const param_province_shape_tex : StringName = &"province_shape_tex"
 const param_province_shape_subdivisions : StringName = &"province_shape_subdivisions"
-const param_province_colour : StringName = &"province_colour_tex"
+const param_province_colour_tex : StringName = &"province_colour_tex"
 const param_hover_index : StringName = &"hover_index"
 const param_selected_index : StringName = &"selected_index"
+const param_terrain_tex : StringName = &"terrain_tex"
 const param_terrain_tile_factor : StringName = &"terrain_tile_factor"
 
-func set_up_shader(material : Material, add_colour_texture : bool) -> Error:
+func set_up_shader(material : Material, add_cosmetic_textures : bool) -> Error:
 	# Shader Material
 	if material == null:
 		push_error("material is null!")
@@ -22,19 +23,26 @@ func set_up_shader(material : Material, add_colour_texture : bool) -> Error:
 	if province_shape_texture == null:
 		push_error("Failed to get province shape texture!")
 		return FAILED
-	shader_material.set_shader_parameter(param_province_shape, province_shape_texture)
+	shader_material.set_shader_parameter(param_province_shape_tex, province_shape_texture)
 	var subdivisions := GameSingleton.get_province_shape_image_subdivisions()
 	if subdivisions.x < 1 or subdivisions.y < 1:
 		push_error("Invalid province shape image subdivision: ", subdivisions.x, "x", subdivisions.y)
 		return FAILED
 	shader_material.set_shader_parameter(param_province_shape_subdivisions, Vector2(subdivisions))
 
-	if add_colour_texture:
+	if add_cosmetic_textures:
 		# Province colour texture
 		var map_province_colour_texture := GameSingleton.get_province_colour_texture()
 		if map_province_colour_texture == null:
 			push_error("Failed to get province colour image!")
 			return FAILED
-		shader_material.set_shader_parameter(param_province_colour, map_province_colour_texture)
+		shader_material.set_shader_parameter(param_province_colour_tex, map_province_colour_texture)
+
+		# Terrain texture
+		var terrain_texture := GameSingleton.get_terrain_texture()
+		if terrain_texture == null:
+			push_error("Failed to get terrain texture!")
+			return FAILED
+		shader_material.set_shader_parameter(param_terrain_tex, terrain_texture)
 
 	return OK
diff --git a/game/src/GameSession/GameSession.tscn b/game/src/GameSession/GameSession.tscn
index 98b43dd..c146b3e 100644
--- a/game/src/GameSession/GameSession.tscn
+++ b/game/src/GameSession/GameSession.tscn
@@ -74,5 +74,6 @@ grow_horizontal = 0
 [connection signal="mouse_exited" from="MapControlPanel" to="MapView" method="_on_mouse_entered_viewport"]
 [connection signal="zoom_in_button_pressed" from="MapControlPanel" to="MapView" method="zoom_in"]
 [connection signal="zoom_out_button_pressed" from="MapControlPanel" to="MapView" method="zoom_out"]
+[connection signal="province_deselected" from="ProvinceOverviewPanel" to="MapView" method="_deselect_province"]
 [connection signal="back_button_pressed" from="OptionsMenu" to="MapView" method="enable_processing"]
 [connection signal="back_button_pressed" from="OptionsMenu" to="OptionsMenu" method="hide"]
diff --git a/game/src/GameSession/MapView.gd b/game/src/GameSession/MapView.gd
index 340083f..2e2c5e6 100644
--- a/game/src/GameSession/MapView.gd
+++ b/game/src/GameSession/MapView.gd
@@ -71,7 +71,8 @@ func _ready():
 
 	# Set map mesh size and get bounds
 	_map_mesh.aspect_ratio = GameSingleton.get_aspect_ratio()
-	_map_shader_material.set_shader_parameter(Events.ShaderManager.param_terrain_tile_factor, float(GameSingleton.get_height()) / 64.0)
+	_map_shader_material.set_shader_parameter(Events.ShaderManager.param_terrain_tile_factor,
+		float(GameSingleton.get_height()) / 128.0)
 	var map_mesh_aabb := _map_mesh.get_core_aabb() * _map_mesh_instance.transform
 	_map_mesh_corner = Vector2(
 		min(map_mesh_aabb.position.x, map_mesh_aabb.end.x),
@@ -111,15 +112,20 @@ func zoom_in() -> void:
 func zoom_out() -> void:
 	_zoom_target += _zoom_target_step
 
+func _select_province(index : int) -> void:
+	_map_shader_material.set_shader_parameter(Events.ShaderManager.param_selected_index, index)
+	province_selected.emit(index)
+
+func _deselect_province() -> void:
+	_select_province(0)
+
 # REQUIREMENTS
 # * SS-31
 func _unhandled_input(event : InputEvent):
 	if _mouse_over_viewport and event.is_action_pressed(_action_click):
 		# Check if the mouse is outside of bounds
 		if _map_mesh.is_valid_uv_coord(_mouse_pos_map):
-			var selected_index := GameSingleton.get_province_index_from_uv_coords(_mouse_pos_map)
-			_map_shader_material.set_shader_parameter(Events.ShaderManager.param_selected_index, selected_index)
-			province_selected.emit(selected_index)
+			_select_province(GameSingleton.get_province_index_from_uv_coords(_mouse_pos_map))
 		else:
 			print("Clicked outside the map!")
 	elif event.is_action_pressed(_action_drag):
diff --git a/game/src/GameSession/MapView.tscn b/game/src/GameSession/MapView.tscn
index efbad4e..fa6ffcd 100644
--- a/game/src/GameSession/MapView.tscn
+++ b/game/src/GameSession/MapView.tscn
@@ -1,17 +1,15 @@
-[gd_scene load_steps=6 format=3 uid="uid://dkehmdnuxih2r"]
+[gd_scene load_steps=5 format=3 uid="uid://dkehmdnuxih2r"]
 
 [ext_resource type="Script" path="res://src/GameSession/MapView.gd" id="1_exccw"]
 [ext_resource type="Shader" path="res://src/GameSession/TerrainMap.gdshader" id="1_upocn"]
-[ext_resource type="Texture2D" uid="uid://ckf222w5usrsu" path="res://art/terrain/farmlands.png" id="3_47mq1"]
 
 [sub_resource type="ShaderMaterial" id="ShaderMaterial_tayeg"]
 render_priority = 0
 shader = ExtResource("1_upocn")
-shader_parameter/province_index_subdivisions = null
+shader_parameter/province_shape_subdivisions = null
 shader_parameter/hover_index = null
 shader_parameter/selected_index = null
 shader_parameter/terrain_tile_factor = null
-shader_parameter/farmlands_tex = ExtResource("3_47mq1")
 
 [sub_resource type="MapMesh" id="MapMesh_3gtsd"]
 
diff --git a/game/src/GameSession/ProvinceOverviewPanel.gd b/game/src/GameSession/ProvinceOverviewPanel.gd
index 17da9d0..5a914f7 100644
--- a/game/src/GameSession/ProvinceOverviewPanel.gd
+++ b/game/src/GameSession/ProvinceOverviewPanel.gd
@@ -1,5 +1,7 @@
 extends PanelContainer
 
+signal province_deselected
+
 @export var _province_name_label : Label
 @export var _region_name_label : Label
 @export var _life_rating_bar : ProgressBar
@@ -92,4 +94,4 @@ func _on_province_selected(index : int) -> void:
 	_selected_index = index
 
 func _on_close_button_pressed() -> void:
-	_selected_index = 0
+	province_deselected.emit()
diff --git a/game/src/GameSession/TerrainMap.gdshader b/game/src/GameSession/TerrainMap.gdshader
index 05928f3..cab757b 100644
--- a/game/src/GameSession/TerrainMap.gdshader
+++ b/game/src/GameSession/TerrainMap.gdshader
@@ -10,27 +10,22 @@ uniform sampler2D province_colour_tex: source_color, repeat_enable, filter_neare
 uniform uint hover_index;
 // Index of the currently selected province
 uniform uint selected_index;
-// Cosmetic farmlands terrain texture
-uniform sampler2D farmlands_tex: source_color, repeat_enable, filter_linear;
+// Cosmetic terrain textures
+uniform sampler2DArray terrain_tex: source_color, repeat_enable, filter_linear;
 // The number of times the terrain textures should tile vertically
 uniform float terrain_tile_factor;
 
-const vec3 water_colour = vec3(0, 0, 1);
-
 vec3 get_terrain_colour(vec2 uv, vec2 corner, vec2 half_pixel_size, vec2 terrain_uv) {
 	uvec3 province_data = read_uvec3(fma(corner, half_pixel_size, uv));
+	vec4 province_colour = texelFetch(province_colour_tex, ivec2(province_data.rg), 0);
+	vec3 terrain_colour = texture(terrain_tex, vec3(terrain_uv, float(province_data.b))).rgb;
 	uint index = uvec2_to_uint(province_data.rg);
-	float is_land = float(province_data.b != 0u);
-	vec3 province_colour = texelFetch(province_colour_tex, ivec2(province_data.rg), 0).rgb;
-	vec3 farmlands_colour = texture(farmlands_tex, terrain_uv).rgb;
-	vec3 terrain_colour = mix(water_colour, farmlands_colour, is_land);
-	float mix_val = 0.4 + float(index == hover_index) * 0.2 + float(index == selected_index) * 0.2;
-	vec3 mixed_colour = mix(terrain_colour, province_colour, mix_val);
-	return mixed_colour;
+	float mix_val = province_colour.a + float(index == hover_index) * 0.2 + float(index == selected_index) * 0.2;
+	return mix(terrain_colour, province_colour.rgb, mix_val);
 }
 
 vec3 mix_terrain_colour(vec2 uv) {
-	vec2 map_size = vec2(textureSize(province_shape_tex, 0).xy);
+	vec2 map_size = vec2(textureSize(province_shape_tex, 0).xy) * province_shape_subdivisions;
 	vec2 pixel_offset = fract(fma(uv, map_size, vec2(0.5)));
 	vec2 half_pixel_size = 0.49 / map_size;