ryan
043f114083
- Added PropTrajectory class for deterministic ballistic calculations. - Introduced StickmanPropInteraction component to manage prop interactions (pickup, drop, throw). - Implemented grip resolution and attachment logic for props. - Added signals for interaction events (prop_picked_up, prop_dropped, prop_thrown). - Defined specifications for prop interaction lifecycle and event rules. - Ensured compatibility with existing prop systems and added new capabilities for prop pickup.
407 lines
14 KiB
GDScript
407 lines
14 KiB
GDScript
@tool
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class_name PropBlock
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extends RigidBody2D
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## PropBlock - Reusable dynamic vector prop (RigidBody2D).
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##
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## A root RigidBody2D with three children built in code — a Polygon2D (interior
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## fill), a Line2D (crisp vector outline, round joints/caps), and a collision
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## node: a CollisionPolygon2D with BUILD_SOLIDS for polygon props, or a
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## CollisionShape2D with a CircleShape2D for circle props. Fully @tool: exported
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## properties update the children live. A material preset selector sets mass,
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## friction/bounce (PhysicsMaterial), and themed visuals.
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const PropVisuals := preload("res://scripts/prop_visuals.gd")
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const PropAnchorData := preload("res://scripts/prop_anchor_data.gd")
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# ---------------------------------------------------------------------------
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# Enums
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# ---------------------------------------------------------------------------
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enum ShapeType { POLYGON, CIRCLE }
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enum MaterialPreset { NONE, WOOD, RUBBER, CARDBOARD, METAL }
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## Stable library provenance used by Sandbox Stage scene files.
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var spawn_id: String = ""
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## Runtime interaction metadata. Both values are additive so existing scenes
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## and built-in templates remain pickup-enabled.
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var can_be_picked_up: bool = true
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var anchors: Dictionary = PropAnchorData.default_anchors()
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var held_by_instance_id: int = 0
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# ---------------------------------------------------------------------------
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# Child node names
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# ---------------------------------------------------------------------------
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const POLYGON_NODE_NAME := "Polygon2D"
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const OUTLINE_NODE_NAME := "Outline"
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const COLLISION_POLYGON_NODE_NAME := "CollisionPolygon2D"
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const COLLISION_SHAPE_NODE_NAME := "CollisionShape2D"
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## Segment count for the generated circle polygon/outline.
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const CIRCLE_SEGMENTS: int = 48
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const DEFAULT_FILL_COLOR := Color(0.55, 0.35, 0.15, 1.0)
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const DEFAULT_OUTLINE_COLOR := Color(0.15, 0.08, 0.02, 1.0)
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const DEFAULT_OUTLINE_WIDTH: float = 2.0
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const MAX_CONTACTS_REPORTED := 32
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# ---------------------------------------------------------------------------
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# Exported properties
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# ---------------------------------------------------------------------------
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@export_enum("Polygon", "Circle") var shape_type: int = ShapeType.POLYGON:
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set(value):
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shape_type = value
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_apply_shape()
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@export var polygon_points: PackedVector2Array = PackedVector2Array():
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set(value):
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polygon_points = value
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if shape_type == ShapeType.POLYGON:
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_apply_polygon_geometry()
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@export var radius: float = 32.0:
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set(value):
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radius = value
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if shape_type == ShapeType.CIRCLE:
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_apply_circle_geometry()
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@export var fill_color: Color = DEFAULT_FILL_COLOR:
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set(value):
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fill_color = value
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if _polygon != null:
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_polygon.color = value
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@export var outline_color: Color = DEFAULT_OUTLINE_COLOR:
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set(value):
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outline_color = value
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if _outline != null:
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_outline.default_color = value
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@export var outline_width: float = DEFAULT_OUTLINE_WIDTH:
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set(value):
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outline_width = value
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if _outline != null:
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_outline.width = value
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@export_enum("None", "Wood", "Rubber", "Cardboard", "Metal") var material_preset: int = MaterialPreset.NONE:
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set(value):
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material_preset = value
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_apply_material_preset()
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# ---------------------------------------------------------------------------
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# Internal node references (built in _ready, @tool-safe)
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# ---------------------------------------------------------------------------
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var _polygon: Polygon2D
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var _outline: Line2D
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var _collision_polygon: CollisionPolygon2D
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var _collision_shape: CollisionShape2D
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var _circle_shape: CircleShape2D
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var _custom_shapes: bool = false
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var _visual_local_bounds := Rect2()
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var _custom_collision_hull: PackedVector2Array = PackedVector2Array()
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var _play_instance_scale: Vector2 = Vector2.ONE
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var _play_scale_active: bool = false
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# ---------------------------------------------------------------------------
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# Signals
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# ---------------------------------------------------------------------------
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## Emitted when this prop's body makes contact with another physics body.
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## `other` is the body that entered contact (Phase 4 trigger source).
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signal collided(other: Node, contact_normal: Vector2, contact_position: Vector2)
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signal separated(other: Node)
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# ---------------------------------------------------------------------------
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# Lifecycle
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# ---------------------------------------------------------------------------
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func _ready() -> void:
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_ensure_children()
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_apply_shape()
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_apply_style()
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# Enable contact reporting so the body_entered signal fires (Phase 4).
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contact_monitor = true
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max_contacts_reported = MAX_CONTACTS_REPORTED
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continuous_cd = RigidBody2D.CCD_MODE_CAST_SHAPE
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if not body_entered.is_connected(_on_body_entered):
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body_entered.connect(_on_body_entered)
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if not body_exited.is_connected(_on_body_exited):
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body_exited.connect(_on_body_exited)
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func _on_body_entered(body: Node) -> void:
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var center: Vector2 = (body as Node2D).global_position if body is Node2D else global_position
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var normal: Vector2 = (center - global_position).normalized()
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var position: Vector2 = global_position
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var direct_state := PhysicsServer2D.body_get_direct_state(get_rid())
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if direct_state != null:
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for index: int in direct_state.get_contact_count():
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if direct_state.get_contact_collider_id(index) == body.get_instance_id():
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var reported: Vector2 = direct_state.get_contact_local_normal(index)
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if not reported.is_zero_approx():
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normal = reported.normalized()
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if normal.dot(center - global_position) < 0.0:
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normal = -normal
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position = direct_state.get_contact_local_position(index)
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break
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collided.emit(body, normal, position)
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func _on_body_exited(body: Node) -> void:
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separated.emit(body)
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# ---------------------------------------------------------------------------
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# Internal build / apply
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# ---------------------------------------------------------------------------
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func _ensure_children() -> void:
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_polygon = get_node_or_null(NodePath(POLYGON_NODE_NAME)) as Polygon2D
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if _polygon == null:
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_polygon = Polygon2D.new()
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_polygon.name = POLYGON_NODE_NAME
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add_child(_polygon)
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_outline = get_node_or_null(NodePath(OUTLINE_NODE_NAME)) as Line2D
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if _outline == null:
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_outline = Line2D.new()
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_outline.name = OUTLINE_NODE_NAME
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_outline.joint_mode = Line2D.LINE_JOINT_ROUND
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_outline.begin_cap_mode = Line2D.LINE_CAP_ROUND
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_outline.end_cap_mode = Line2D.LINE_CAP_ROUND
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add_child(_outline)
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_collision_polygon = get_node_or_null(NodePath(COLLISION_POLYGON_NODE_NAME)) as CollisionPolygon2D
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if _collision_polygon == null:
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_collision_polygon = CollisionPolygon2D.new()
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_collision_polygon.name = COLLISION_POLYGON_NODE_NAME
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_collision_polygon.build_mode = CollisionPolygon2D.BUILD_SOLIDS
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add_child(_collision_polygon)
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_collision_shape = get_node_or_null(NodePath(COLLISION_SHAPE_NODE_NAME)) as CollisionShape2D
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if _collision_shape == null:
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_collision_shape = CollisionShape2D.new()
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_collision_shape.name = COLLISION_SHAPE_NODE_NAME
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_circle_shape = CircleShape2D.new()
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_circle_shape.radius = radius
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_collision_shape.shape = _circle_shape
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add_child(_collision_shape)
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else:
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# A pre-existing collision shape (e.g. persisted in a scene) may already
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# hold a circle shape; reuse it so radius updates keep working.
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_circle_shape = _collision_shape.shape as CircleShape2D
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func _apply_shape() -> void:
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if shape_type == ShapeType.CIRCLE:
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_apply_circle_geometry()
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_set_collision_polygon_enabled(false)
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_set_collision_shape_enabled(true)
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else:
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_apply_polygon_geometry()
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_set_collision_polygon_enabled(true)
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_set_collision_shape_enabled(false)
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func _apply_polygon_geometry() -> void:
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if _polygon != null:
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_polygon.polygon = polygon_points
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if _collision_polygon != null:
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_collision_polygon.polygon = polygon_points if polygon_points.size() >= 3 else PackedVector2Array()
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if _outline != null:
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var outline_points := polygon_points.duplicate()
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if not outline_points.is_empty():
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outline_points.append(polygon_points[0])
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_outline.points = outline_points
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func _apply_circle_geometry() -> void:
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var loop := PackedVector2Array()
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for i: int in CIRCLE_SEGMENTS:
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var angle: float = TAU * float(i) / float(CIRCLE_SEGMENTS)
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loop.append(Vector2(cos(angle), sin(angle)) * radius)
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if _polygon != null:
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_polygon.polygon = loop
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if _outline != null:
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var outline_points := loop.duplicate()
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if not outline_points.is_empty():
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outline_points.append(loop[0])
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_outline.points = outline_points
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if _circle_shape != null:
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_circle_shape.radius = radius
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func _set_collision_polygon_enabled(enabled: bool) -> void:
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if _collision_polygon != null:
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_collision_polygon.disabled = not enabled
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func _set_collision_shape_enabled(enabled: bool) -> void:
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if _collision_shape != null:
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_collision_shape.disabled = not enabled
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func _apply_style() -> void:
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if _polygon != null:
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_polygon.color = fill_color
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if _outline != null:
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_outline.default_color = outline_color
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_outline.width = outline_width
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func _apply_material_preset() -> void:
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mass = mass_for(material_preset)
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physics_material_override = physics_material(material_preset)
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if not _custom_shapes and material_preset != MaterialPreset.NONE:
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fill_color = tint_for(material_preset)
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outline_color = tint_for(material_preset).darkened(0.55)
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func set_custom_shapes(shapes: Array[Dictionary], collision_hull: PackedVector2Array) -> void:
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_ensure_children()
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_custom_shapes = true
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_polygon.visible = false
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_outline.visible = false
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_set_collision_shape_enabled(false)
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_set_collision_polygon_enabled(true)
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_custom_collision_hull = collision_hull.duplicate()
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_collision_polygon.polygon = _custom_collision_hull
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var visuals := get_node_or_null(NodePath("Visuals")) as Node2D
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if visuals == null:
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visuals = Node2D.new(); visuals.name = "Visuals"; add_child(visuals)
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for child: Node in visuals.get_children(): child.queue_free()
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_visual_local_bounds = PropVisuals.build(visuals, shapes)
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_apply_material_preset()
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func has_custom_shapes() -> bool:
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return _custom_shapes
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func get_visual_local_bounds() -> Rect2:
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if _custom_shapes:
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return _visual_local_bounds
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if shape_type == ShapeType.CIRCLE:
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return Rect2(Vector2.ONE * -radius, Vector2.ONE * radius * 2.0)
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if not polygon_points.is_empty():
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var bounds: Rect2 = Rect2(polygon_points[0], Vector2.ZERO)
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for point: Vector2 in polygon_points:
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bounds = bounds.expand(point)
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return bounds
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return Rect2()
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## RigidBody2D transforms do not reliably retain scale during simulation. Move
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## the authored uniform scale into child visuals and collision geometry for
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## PLAY, then restore the root scale on return to EDIT for scene persistence.
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func begin_play_instance_scale() -> void:
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if _play_scale_active:
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return
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_play_instance_scale = scale
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if _play_instance_scale.is_equal_approx(Vector2.ONE):
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return
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_play_scale_active = true
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scale = Vector2.ONE
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_apply_play_scale()
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func end_play_instance_scale() -> void:
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if not _play_scale_active:
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return
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_play_scale_active = false
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_set_visual_scale(Vector2.ONE)
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_apply_shape()
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if _custom_shapes and _collision_polygon != null:
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_collision_polygon.polygon = _custom_collision_hull
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scale = _play_instance_scale
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func _apply_play_scale() -> void:
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_set_visual_scale(_play_instance_scale)
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if _custom_shapes:
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if _collision_polygon != null:
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_collision_polygon.polygon = _scaled_points(_custom_collision_hull, _play_instance_scale)
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return
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if shape_type == ShapeType.CIRCLE:
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# A non-uniform legacy instance scale makes an ellipse. Use the generated
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# polygon hull while simulating so collision follows both axes exactly.
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if _collision_polygon != null:
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_collision_polygon.polygon = _scaled_points(_circle_loop(), _play_instance_scale)
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_set_collision_shape_enabled(false)
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_set_collision_polygon_enabled(true)
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elif _collision_polygon != null:
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_collision_polygon.polygon = _scaled_points(polygon_points, _play_instance_scale)
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func _set_visual_scale(value: Vector2) -> void:
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if _polygon != null:
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_polygon.scale = value
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if _outline != null:
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_outline.scale = value
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var visuals: Node2D = get_node_or_null(NodePath("Visuals")) as Node2D
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if visuals != null:
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visuals.scale = value
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func _scaled_points(points: PackedVector2Array, value: Vector2) -> PackedVector2Array:
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var result: PackedVector2Array = PackedVector2Array()
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for point: Vector2 in points:
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result.append(point * value)
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return result
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func _circle_loop() -> PackedVector2Array:
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var result: PackedVector2Array = PackedVector2Array()
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for index: int in CIRCLE_SEGMENTS:
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var angle: float = TAU * float(index) / float(CIRCLE_SEGMENTS)
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result.append(Vector2(cos(angle), sin(angle)) * radius)
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return result
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# ---------------------------------------------------------------------------
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# Static preset factories
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# ---------------------------------------------------------------------------
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static func physics_material(preset: int) -> PhysicsMaterial:
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var mat := PhysicsMaterial.new()
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match preset:
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MaterialPreset.WOOD:
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mat.friction = 0.6
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mat.bounce = 0.1
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MaterialPreset.RUBBER:
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mat.friction = 0.9
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mat.bounce = 0.85
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MaterialPreset.CARDBOARD:
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mat.friction = 0.3
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mat.bounce = 0.05
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MaterialPreset.METAL:
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mat.friction = 0.9
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mat.bounce = 0.0
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_:
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mat.friction = 0.5
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mat.bounce = 0.05
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return mat
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static func mass_for(preset: int) -> float:
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match preset:
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MaterialPreset.WOOD:
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return 3.0
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MaterialPreset.RUBBER:
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return 0.5
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MaterialPreset.CARDBOARD:
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return 0.4
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MaterialPreset.METAL:
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return 8.0
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_:
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return 1.0
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static func tint_for(preset: int) -> Color:
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match preset:
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MaterialPreset.WOOD:
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return Color(0.55, 0.38, 0.2, 1.0)
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MaterialPreset.RUBBER:
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return Color(0.9, 0.2, 0.2, 1.0)
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MaterialPreset.CARDBOARD:
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return Color(0.85, 0.72, 0.45, 1.0)
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MaterialPreset.METAL:
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return Color(0.5, 0.55, 0.6, 1.0)
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_:
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return DEFAULT_FILL_COLOR
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