1 files changed, 105 insertions, 0 deletions
diff --git a/game/src/Game/GameSession/MapControlPanel/Minimap.gd b/game/src/Game/GameSession/MapControlPanel/Minimap.gd
new file mode 100644
index 0000000..1f9b75e
--- /dev/null
+++ b/game/src/Game/GameSession/MapControlPanel/Minimap.gd
@@ -0,0 +1,105 @@
+extends Control
+
+signal minimap_clicked(pos_clicked : Vector2)
+
+const _action_click : StringName = &"map_click"
+
+@export var _minimap_texture : Control
+var _minimap_shader : ShaderMaterial
+
+var _viewport_points : PackedVector2Array
+
+func _ready():
+	_minimap_texture.custom_minimum_size = Vector2(GameSingleton.get_aspect_ratio(), 1.0) * 150
+	var minimap_material := _minimap_texture.get_material()
+	if Events.ShaderManager.set_up_shader(minimap_material, false) != OK:
+		push_error("Failed to set up minimap shader")
+	else:
+		_minimap_shader = minimap_material
+	GameSingleton.province_selected.connect(_on_province_selected)
+
+func _on_province_selected(index : int) -> void:
+	if _minimap_shader != null:
+		_minimap_shader.set_shader_parameter(Events.ShaderManager.param_selected_index, index)
+
+# REQUIREMENTS
+# * SS-80
+# * UI-752
+func _draw() -> void:
+	if _viewport_points.size() > 1:
+		draw_multiline(_viewport_points, Color.WHITE, -1)
+
+# REQUIREMENTS
+# * SS-81
+# * UIFUN-127
+func _unhandled_input(event : InputEvent):
+	if event is InputEventMouse and Input.is_action_pressed(_action_click):
+		var pos_clicked := get_local_mouse_position() / size - Vector2(0.5, 0.5)
+		if abs(pos_clicked.x) < 0.5 and abs(pos_clicked.y) < 0.5:
+			minimap_clicked.emit(pos_clicked)
+
+# Returns the point on the line going through p and q with the specific x coord
+func _intersect_x(p : Vector2, q : Vector2, x : float) -> Vector2:
+	if p.x == q.x:
+		return Vector2(x, 0.5 * (p.y + q.y))
+	var t := (x - q.x) / (p.x - q.x)
+	return q + t * (p - q)
+
+# Returns the point on the line going through p and q with the specific y coord
+func _intersect_y(p : Vector2, q : Vector2, y : float) -> Vector2:
+	if p.y == q.y:
+		return Vector2(0.5 * (p.x + q.x), y)
+	var t := (y - q.y) / (p.y - q.y)
+	return q + t * (p - q)
+
+const _one_x := Vector2(1, 0)
+
+func _add_line_looped_over_x(left : Vector2, right : Vector2) -> void:
+	if left.x < 0:
+		if right.x < 0:
+			_viewport_points.push_back(left + _one_x)
+			_viewport_points.push_back(right + _one_x)
+		else:
+			var mid_point := _intersect_x(left, right, 0)
+			_viewport_points.push_back(mid_point)
+			_viewport_points.push_back(right)
+			mid_point.x = 1
+			_viewport_points.push_back(left + _one_x)
+			_viewport_points.push_back(mid_point)
+	elif right.x > 1:
+		if left.x > 1:
+			_viewport_points.push_back(left - _one_x)
+			_viewport_points.push_back(right - _one_x)
+		else:
+			var mid_point := _intersect_x(left, right, 1)
+			_viewport_points.push_back(left)
+			_viewport_points.push_back(mid_point)
+			mid_point.x = 0
+			_viewport_points.push_back(mid_point)
+			_viewport_points.push_back(right - _one_x)
+	else:
+		_viewport_points.push_back(left)
+		_viewport_points.push_back(right)
+
+# This can break if the viewport is rotated too far!
+func _on_map_view_camera_changed(near_left : Vector2, far_left : Vector2, far_right : Vector2, near_right : Vector2) -> void:
+	# Bound far y coords
+	if far_left.y < 0:
+		far_left = _intersect_y(near_left, far_left, 0)
+	if far_right.y < 0:
+		far_right = _intersect_y(near_right, far_right, 0)
+	# Bound near y coords
+	if near_left.y > 1:
+		near_left = _intersect_y(near_left, far_left, 1)
+	if near_right.y > 1:
+		near_right = _intersect_y(near_right, far_right, 1)
+
+	_viewport_points.clear()
+	_add_line_looped_over_x(near_left, near_right)
+	_add_line_looped_over_x(far_left, far_right)
+	_add_line_looped_over_x(far_left, near_left)
+	_add_line_looped_over_x(near_right, far_right)
+
+	for i in _viewport_points.size():
+		_viewport_points[i] *= size
+	queue_redraw()