ryan
ef30931b20
- Introduced StageGizmos for hover highlighting, selection outlines, and rotation handles in the sandbox stage builder. - Added StageGrid for an optional world-space grid overlay that adjusts with camera panning and zooming. - Implemented StageSelection for geometric hit-testing and selection management of nodes in the sandbox. - Created StageSpawner as a registry-driven factory for spawning terrain, props, and stickmen, allowing for dynamic template management. - Each script includes necessary constants, state management, and public API methods for interaction.
173 lines
5.5 KiB
GDScript
173 lines
5.5 KiB
GDScript
class_name StageGizmos
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extends Node2D
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## StageGizmos - Hover highlight, selection outline and a rotate gizmo for the
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## Sandbox Stage Builder (Phase 2).
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##
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## Translation is done by dragging the object directly (no translate handle);
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## only the rotate ring is a dedicated handle. Pure drawing + distance-based
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## handle hit-testing (no Area2D). Dragging drives global_position /
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## global_rotation so it works for any Node2D. Hidden and disabled in PLAY mode.
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const STAGE_SELECTION := preload("res://scripts/stage_selection.gd")
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# ---------------------------------------------------------------------------
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# Enums
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# ---------------------------------------------------------------------------
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enum Handle { NONE, TRANSLATE, ROTATE }
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# ---------------------------------------------------------------------------
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# Signals
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# ---------------------------------------------------------------------------
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signal transform_committed(node: Node2D)
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# ---------------------------------------------------------------------------
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# Style constants (screen-space px; divided by zoom for world-space drawing)
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# ---------------------------------------------------------------------------
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const SELECTION_COLOR := Color(1.0, 1.0, 1.0, 0.9)
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const HOVER_COLOR := Color(1.0, 0.9, 0.2, 0.5)
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const ROTATE_COLOR := Color(0.3, 0.6, 1.0, 0.9)
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const SELECTION_WIDTH := 2.0
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const HOVER_WIDTH := 1.5
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const ROTATE_WIDTH := 2.0
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const ROTATE_HANDLE_MARGIN_PX := 48.0
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const ROTATE_RING_TOLERANCE_PX := 12.0
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# ---------------------------------------------------------------------------
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# State
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# ---------------------------------------------------------------------------
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var camera: Camera2D = null
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## When > 0, translation drags snap to this grid size (0 = off).
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var snap_size: float = 0.0
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var _enabled: bool = true
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var _target: Node2D = null
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var _hovered: Node2D = null
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var _dragging: Handle = Handle.NONE
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var _drag_last: Vector2 = Vector2.ZERO
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var _box_rect: Rect2 = Rect2()
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# ---------------------------------------------------------------------------
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# Public API
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# ---------------------------------------------------------------------------
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func set_target(node: Node2D) -> void:
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_target = node
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queue_redraw()
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func set_hover(node: Node2D) -> void:
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_hovered = node
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queue_redraw()
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func set_enabled(enabled: bool) -> void:
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_enabled = enabled
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visible = enabled
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queue_redraw()
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func get_target() -> Node2D:
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return _target
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func set_box_rect(rect: Rect2) -> void:
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_box_rect = rect
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queue_redraw()
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## Returns ROTATE if the cursor is on the rotate ring of the primary selection.
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func hit_test(world_pos: Vector2) -> Handle:
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if _target == null or not is_instance_valid(_target) or not _enabled:
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return Handle.NONE
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var rect := STAGE_SELECTION.get_world_aabb(_target)
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var ring := _rotate_ring_radius(rect)
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if absf(world_pos.distance_to(rect.get_center()) - ring) <= ROTATE_RING_TOLERANCE_PX / _zoom():
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return Handle.ROTATE
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return Handle.NONE
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## Begins a rotate drag (used when the ring is clicked).
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func begin_drag(world_pos: Vector2) -> void:
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_dragging = hit_test(world_pos)
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_drag_last = world_pos
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## Begins a translate drag on `node` (used when an object body is clicked).
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func begin_translate_drag(node: Node2D, world_pos: Vector2) -> void:
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_target = node
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_dragging = Handle.TRANSLATE
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_drag_last = world_pos
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func drag_to(world_pos: Vector2) -> void:
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if _target == null or not is_instance_valid(_target) or _dragging == Handle.NONE:
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return
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var delta := world_pos - _drag_last
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if _dragging == Handle.TRANSLATE:
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_target.global_position += delta
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if snap_size > 0.0:
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_target.global_position = _snap(_target.global_position)
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elif _dragging == Handle.ROTATE:
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var center := STAGE_SELECTION.get_world_aabb(_target).get_center()
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var before := (_drag_last - center).angle()
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var after := (world_pos - center).angle()
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_target.global_rotation += after - before
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_drag_last = world_pos
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queue_redraw()
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func end_drag() -> void:
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if _dragging != Handle.NONE and _target != null and is_instance_valid(_target):
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transform_committed.emit(_target)
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_dragging = Handle.NONE
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func is_dragging() -> bool:
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return _dragging != Handle.NONE
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# ---------------------------------------------------------------------------
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# Frame / drawing
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# ---------------------------------------------------------------------------
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func _process(_delta: float) -> void:
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if _enabled and (_target != null or _hovered != null or _box_rect.has_area()):
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queue_redraw()
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func _draw() -> void:
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if not _enabled:
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return
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var zoom := _zoom()
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if _hovered != null and is_instance_valid(_hovered) and _hovered != _target:
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draw_rect(STAGE_SELECTION.get_world_aabb(_hovered), HOVER_COLOR, false, HOVER_WIDTH / zoom)
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if _target != null and is_instance_valid(_target):
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var rect := STAGE_SELECTION.get_world_aabb(_target)
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draw_rect(rect, SELECTION_COLOR, false, SELECTION_WIDTH / zoom)
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draw_arc(rect.get_center(), _rotate_ring_radius(rect), 0.0, TAU, 64, ROTATE_COLOR, ROTATE_WIDTH / zoom, true)
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if _box_rect.has_area():
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draw_rect(_box_rect, HOVER_COLOR, false, HOVER_WIDTH / zoom)
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# ---------------------------------------------------------------------------
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# Internal helpers
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# ---------------------------------------------------------------------------
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func _zoom() -> float:
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if camera != null and is_instance_valid(camera):
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return maxf(camera.zoom.x, 0.0001)
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return 1.0
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func _rotate_ring_radius(rect: Rect2) -> float:
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return rect.size.length() * 0.5 + ROTATE_HANDLE_MARGIN_PX / _zoom()
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func _snap(v: Vector2) -> Vector2:
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return Vector2(roundf(v.x / snap_size) * snap_size, roundf(v.y / snap_size) * snap_size)
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