First go at terrain map implementation

5 files changed, 118 insertions, 2 deletions

diff --git a/game/src/GameSession/GameSession.tscn b/game/src/GameSession/GameSession.tscn
index f984daf..a707b04 100644
--- a/game/src/GameSession/GameSession.tscn
+++ b/game/src/GameSession/GameSession.tscn
@@ -1,8 +1,9 @@
-[gd_scene load_steps=4 format=3 uid="uid://bgnupcshe1m7r"]
+[gd_scene load_steps=5 format=3 uid="uid://bgnupcshe1m7r"]
 
 [ext_resource type="Script" path="res://src/GameSession/GameSession.gd" id="1_eklvp"]
 [ext_resource type="PackedScene" uid="uid://g524p8lr574w" path="res://src/GameSession/MapControlPanel.tscn" id="3_afh6d"]
 [ext_resource type="PackedScene" uid="uid://dvdynl6eir40o" path="res://src/GameSession/GameSessionMenu.tscn" id="3_bvmqh"]
+[ext_resource type="PackedScene" uid="uid://dkehmdnuxih2r" path="res://src/GameSession/MapViewport.tscn" id="4_xkg5j"]
 
 [node name="GameSession" type="Control" node_paths=PackedStringArray("_game_session_menu")]
 editor_description = "SS-102"
@@ -15,6 +16,14 @@ grow_vertical = 2
 script = ExtResource("1_eklvp")
 _game_session_menu = NodePath("GameSessionMenu")
 
+[node name="MapViewport" parent="." instance=ExtResource("4_xkg5j")]
+layout_mode = 1
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+
 [node name="GameSessionMenu" parent="." instance=ExtResource("3_bvmqh")]
 visible = false
 layout_mode = 1
diff --git a/game/src/GameSession/MapControlPanel.tscn b/game/src/GameSession/MapControlPanel.tscn
index 71d43e7..2a0c971 100644
--- a/game/src/GameSession/MapControlPanel.tscn
+++ b/game/src/GameSession/MapControlPanel.tscn
@@ -1,7 +1,13 @@
-[gd_scene load_steps=2 format=3 uid="uid://g524p8lr574w"]
+[gd_scene load_steps=4 format=3 uid="uid://g524p8lr574w"]
 
 [ext_resource type="Script" path="res://src/GameSession/MapControlPanel.gd" id="1_ign64"]
 
+[sub_resource type="InputEventAction" id="InputEventAction_5nck3"]
+action = &"ui_cancel"
+
+[sub_resource type="Shortcut" id="Shortcut_fc1tk"]
+events = [SubResource("InputEventAction_5nck3")]
+
 [node name="PanelContainer" type="PanelContainer"]
 editor_description = "SS-103"
 script = ExtResource("1_ign64")
@@ -27,6 +33,7 @@ layout_mode = 2
 [node name="GameSessionMenuButton" type="Button" parent="HBoxContainer/AuxiliaryPanel"]
 editor_description = "UI-9"
 layout_mode = 2
+shortcut = SubResource("Shortcut_fc1tk")
 text = "ESC"
 
 [connection signal="pressed" from="HBoxContainer/AuxiliaryPanel/GameSessionMenuButton" to="." method="_on_game_session_menu_button_pressed"]
diff --git a/game/src/GameSession/MapViewport.gd b/game/src/GameSession/MapViewport.gd
new file mode 100644
index 0000000..fa57163
--- /dev/null
+++ b/game/src/GameSession/MapViewport.gd
@@ -0,0 +1,59 @@
+extends SubViewportContainer
+
+const _action_north : StringName = &"map_north"
+const _action_east : StringName = &"map_east"
+const _action_south : StringName = &"map_south"
+const _action_west : StringName = &"map_west"
+const _action_zoomin : StringName = &"map_zoomin"
+const _action_zoomout : StringName = &"map_zoomout"
+
+const _move_speed : float = 1.0
+
+const _zoom_target_min : float = 0.2
+const _zoom_target_max : float = 5.0
+const _zoom_target_step : float = 0.1
+const _zoom_epsilon : float = _zoom_target_step * 0.1
+const _zoom_speed : float = 5.0
+var _zoom_target : float = 1.0:
+	get: return _zoom_target
+	set(v): _zoom_target = clamp(v, _zoom_target_min, _zoom_target_max)
+
+@export var _camera : Camera3D
+@export var _map_mesh : MeshInstance3D
+
+func _input(event : InputEvent):
+	if event.is_action_pressed(_action_zoomin, true):
+		_zoom_target -= _zoom_target_step
+	elif event.is_action_pressed(_action_zoomout, true):
+		_zoom_target += _zoom_target_step
+
+func _physics_process(delta):
+	# Process movement
+	var height : float = _camera.transform.origin.y
+	var move := Vector3(
+		float(Input.is_action_pressed(_action_east)) - float(Input.is_action_pressed(_action_west)),
+		0.0,
+		float(Input.is_action_pressed(_action_south)) - float(Input.is_action_pressed(_action_north)),
+	)
+	move *= _move_speed * height * delta
+	_camera.global_translate(move)
+
+	# Keep within map bounds
+	var bounds := _map_mesh.get_aabb() * _map_mesh.transform
+	var width := bounds.end.x - bounds.position.x
+	var left := bounds.position.x + 0.25 * width
+	var longitude := fposmod(_camera.transform.origin.x - left, width * 0.5)
+	_camera.transform.origin.x = left + longitude
+	_camera.transform.origin.z = clamp(_camera.transform.origin.z, bounds.position.z, bounds.end.z)
+
+	# Process zooming
+	var zoom : float = _zoom_target - height
+	height += zoom * _zoom_speed * delta
+	var new_zoom : float = _zoom_target - height
+	if abs(new_zoom) < _zoom_epsilon or sign(zoom) != sign(new_zoom):
+		height = _zoom_target
+	_camera.transform.origin.y = height
+
+	# Orient based on height
+	var dir := Vector3(0, -1, -exp(-height * 2.0 + 0.5))
+	_camera.look_at(_camera.transform.origin + dir)
diff --git a/game/src/GameSession/MapViewport.tscn b/game/src/GameSession/MapViewport.tscn
new file mode 100644
index 0000000..8a34b54
--- /dev/null
+++ b/game/src/GameSession/MapViewport.tscn
@@ -0,0 +1,31 @@
+[gd_scene load_steps=6 format=3 uid="uid://dkehmdnuxih2r"]
+
+[ext_resource type="Script" path="res://src/GameSession/MapViewport.gd" id="1_exccw"]
+[ext_resource type="Shader" path="res://src/GameSession/TerrainMap.gdshader" id="1_upocn"]
+[ext_resource type="Texture2D" uid="uid://cmw0pvjthnn8c" path="res://common/map/terrain/terrain.png" id="3_l8pnf"]
+
+[sub_resource type="ShaderMaterial" id="ShaderMaterial_tayeg"]
+render_priority = 0
+shader = ExtResource("1_upocn")
+shader_parameter/tex = ExtResource("3_l8pnf")
+
+[sub_resource type="PlaneMesh" id="PlaneMesh_skc48"]
+size = Vector2(10.8, 2)
+
+[node name="MapViewportContainer" type="SubViewportContainer" node_paths=PackedStringArray("_camera", "_map_mesh")]
+stretch = true
+script = ExtResource("1_exccw")
+_camera = NodePath("MapViewport/Camera3D")
+_map_mesh = NodePath("MapViewport/MeshInstance3D")
+
+[node name="MapViewport" type="SubViewport" parent="."]
+handle_input_locally = false
+render_target_update_mode = 4
+
+[node name="MeshInstance3D" type="MeshInstance3D" parent="MapViewport"]
+transform = Transform3D(5, 0, 0, 0, 5, 0, 0, 0, 5, 0, 0, 0)
+material_override = SubResource("ShaderMaterial_tayeg")
+mesh = SubResource("PlaneMesh_skc48")
+
+[node name="Camera3D" type="Camera3D" parent="MapViewport"]
+transform = Transform3D(1, 0, 0, 0, 0.707107, 0.707107, 0, -0.707107, 0.707107, 0, 1, 1)
diff --git a/game/src/GameSession/TerrainMap.gdshader b/game/src/GameSession/TerrainMap.gdshader
new file mode 100644
index 0000000..522e0f3
--- /dev/null
+++ b/game/src/GameSession/TerrainMap.gdshader
@@ -0,0 +1,10 @@
+shader_type spatial;
+
+render_mode unshaded;
+
+uniform sampler2D tex: source_color, repeat_enable;
+
+void fragment() {
+	vec2 new_uv = vec2(UV.x * 2.0 - 0.5, UV.y);
+	ALBEDO = texture(tex, new_uv).rgb;
+}