100 lines
3.4 KiB
GDScript
100 lines
3.4 KiB
GDScript
@tool
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extends Node3D
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class_name GridCharacterController
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@export var grid_manager_path: NodePath
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@export var camera_path: NodePath
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@export var start_cell: Vector2i = Vector2i.ZERO
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@export_range(0.1, 20.0, 0.1) var move_speed: float = 4.0
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@export_range(0.0, 2.0, 0.01) var height_offset: float = 0.3
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var _grid_manager: GridPlaneManager = null
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var _camera: Camera3D = null
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var _current_cell: Vector2i = Vector2i(-1, -1)
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var _target_position: Vector3
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var _is_moving: bool = false
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func _ready() -> void:
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set_physics_process(true)
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set_process_unhandled_input(true)
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_resolve_references()
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if _grid_manager:
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_grid_manager.grid_layout_changed.connect(_on_grid_layout_changed)
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_move_to_cell(start_cell, true)
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func _physics_process(delta: float) -> void:
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if not _is_moving:
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return
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var direction: Vector3 = _target_position - global_transform.origin
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var distance: float = direction.length()
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if distance <= 0.01:
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global_position = _target_position
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_is_moving = false
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return
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var step: float = move_speed * delta
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var move_vector: Vector3 = direction.normalized() * min(step, distance)
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global_position += move_vector
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func _unhandled_input(event: InputEvent) -> void:
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if Engine.is_editor_hint():
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return
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if event is InputEventMouseButton and event.pressed and event.button_index == MOUSE_BUTTON_LEFT:
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_move_to_mouse_click()
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func _move_to_mouse_click() -> void:
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if not _grid_manager or not _camera:
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return
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var viewport: Viewport = get_viewport()
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if viewport == null:
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return
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var mouse_position: Vector2 = viewport.get_mouse_position()
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var target_cell: Vector2i = _pick_cell(mouse_position)
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if target_cell.x < 0 or target_cell.y < 0:
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return
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_move_to_cell(target_cell)
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func _move_to_cell(cell: Vector2i, instant: bool = false) -> void:
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if not _grid_manager or not _grid_manager.has_cell(cell):
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return
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_current_cell = cell
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var local_center: Vector3 = _grid_manager.cell_to_world(cell)
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var world_center: Vector3 = _grid_manager.to_global(local_center)
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_target_position = world_center + Vector3.UP * height_offset
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if instant:
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global_position = _target_position
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_is_moving = false
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else:
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_is_moving = true
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func _pick_cell(mouse_position: Vector2) -> Vector2i:
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var ray_origin: Vector3 = _camera.project_ray_origin(mouse_position)
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var ray_direction: Vector3 = _camera.project_ray_normal(mouse_position)
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var plane_normal: Vector3 = _grid_manager.global_transform.basis.y.normalized()
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var plane_point: Vector3 = _grid_manager.global_transform.origin
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var denominator: float = plane_normal.dot(ray_direction)
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if abs(denominator) < 0.0001:
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return Vector2i(-1, -1)
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var t: float = plane_normal.dot(plane_point - ray_origin) / denominator
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if t <= 0.0:
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return Vector2i(-1, -1)
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var world_point: Vector3 = ray_origin + ray_direction * t
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return _grid_manager.world_to_cell(world_point, true)
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func _on_grid_layout_changed(_cells: Dictionary) -> void:
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if not _grid_manager:
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return
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if not _grid_manager.has_cell(_current_cell):
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_current_cell = Vector2i(
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clamp(_current_cell.x, 0, _grid_manager.columns - 1),
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clamp(_current_cell.y, 0, _grid_manager.rows - 1)
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)
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_move_to_cell(_current_cell, true)
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func _resolve_references() -> void:
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if grid_manager_path != NodePath():
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_grid_manager = get_node_or_null(grid_manager_path) as GridPlaneManager
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else:
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_grid_manager = get_parent() as GridPlaneManager
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if camera_path != NodePath():
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_camera = get_node_or_null(camera_path) as Camera3D
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