80 lines
2.6 KiB
GDScript
80 lines
2.6 KiB
GDScript
extends Control
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class_name GameUI
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@export var trail: Trail
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var game: GameLogic
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var selected_planet: Planet
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var pointed_planet: Planet
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var dragging_from_planet: bool
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var last_cursor_position: Vector2
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func _on_game_started(game: GameLogic) -> void:
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self.game = game
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for planet in game.planets:
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planet.selected.connect(_on_planet_selected)
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planet.pointer_entered.connect(_on_planet_pointer_entered)
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planet.pointer_exited.connect(_on_planet_pointer_exited)
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#trail.color = game.player
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func _on_planet_selected(planet: Planet) -> void:
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if selected_planet != null:
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selected_planet.is_selected = false
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selected_planet = planet
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selected_planet.is_selected = true
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dragging_from_planet = true
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_update_trail(0., true)
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func _on_planet_pointer_entered(planet: Planet) -> void:
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pointed_planet = planet
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func _on_planet_pointer_exited(planet: Planet) -> void:
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if pointed_planet == planet:
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pointed_planet = null
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func _unhandled_input(event: InputEvent) -> void:
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if event is InputEventMouseMotion:
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# The trail follows the cursor.
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last_cursor_position = event.global_position
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if event is InputEventMouseButton and event.button_index == MOUSE_BUTTON_LEFT and event.is_released():
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# The trail disappears when no longer dragging.
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dragging_from_planet = false
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# Detect mouse released on a planet and spawn a fleet.
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if selected_planet != null and selected_planet.player is LocalPlayer and pointed_planet != null:
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var count = ceil(selected_planet.population / 2)
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selected_planet.population -= count
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if selected_planet.player == pointed_planet.player:
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pointed_planet.population += count
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else:
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pointed_planet.population -= count
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if pointed_planet.population <= 0:
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pointed_planet.player = selected_planet.player
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pointed_planet.population = abs(pointed_planet.population)
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#region Trail
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var trail_opacity := 0.
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func _update_trail(delta: float, snap_position: bool) -> void:
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var show_trail := dragging_from_planet and selected_planet != null and selected_planet.player is LocalPlayer
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if show_trail or trail.visible:
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trail_opacity = Util.damp(trail_opacity, 1. if show_trail else 0., 1e-4, delta)
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trail.color = Color(selected_planet.player.color, trail_opacity)
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trail.visible = trail_opacity > .01
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if show_trail:
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var target_position = last_cursor_position if pointed_planet == null else pointed_planet.global_position
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trail.start_position = selected_planet.global_position
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trail.end_position = target_position if snap_position else Util.damp(trail.end_position, target_position, 1e-20, delta)
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#endregion
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func _process(delta: float) -> void:
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_update_trail(delta, false)
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