Godot Genre Sports

extends RigidBody3D
class_name MagnusBallPhysics

## Expert Physical Ball (Godot 4.6).
## Implements realistic bounce, friction, and the Magnus Effect (spin-lift).

@export var magnus_coefficient: float = 0.5

func _physics_process(delta: float) -> void:
	# Magnus Effect: Force perpendicular to both velocity and spin
	var spin = angular_velocity
	var velocity = linear_velocity
	
	# Expert Pattern: Cross product determines lift direction
	var magnus_force = spin.cross(velocity) * magnus_coefficient
	
	# Apply central force to simulate aerodynamic lift/curve
	apply_central_force(magnus_force)

## [SKILL NOTICE]: Use 'PhysicsMaterial' on the RigidBody3D for 
## friction and bounce. Use 'Magnus Effect' for realistic curve balls.

# skills/genre-sports/scripts/sports_ball_physics.gd
extends RigidBody3D

## Sports Ball Physics (Expert Pattern)
## Implements Magnus Effect (curve) and air drag for realistic ball flight.

class_name SportsBallPhysics

@export var drag_coefficient: float = 0.01
@export var magnus_strength: float = 0.5
@export var air_density: float = 1.2

func _ready() -> void:
    # Ensure continuous collision detection for fast balls
    custom_integrator = true
    continuous_cd = true
    contact_monitor = true
    max_contacts_reported = 3

func _integrate_forces(state: PhysicsDirectBodyState3D) -> void:
    var velocity = state.linear_velocity
    var speed = velocity.length()
    
    if speed < 0.1: return
    
    # Drag Force: Fd = -0.5 * p * v^2 * Cd * A (simplified)
    # Direction opposite to velocity
    var drag_force = -velocity.normalized() * (0.5 * air_density * speed * speed * drag_coefficient)
    state.apply_central_force(drag_force)
    
    # Magnus Effect: Fm = S(w x v)
    # Cross product of angular velocity and linear velocity
    var angular_vel = state.angular_velocity
    if angular_vel.length_squared() > 1.0:
        var magnus_force = angular_vel.cross(velocity) * magnus_strength
        state.apply_central_force(magnus_force)

## EXPERT USAGE:
## Attach to a RigidBody3D. Set Linear/Angular Damp to 0 in inspector 
## (since we apply custom drag). Shoot ball with 'apply_impulse'.

# sports_patterns.gd
extends Node

# 1. Physics-Safe Ball Impulses
# EXPERT NOTE: Forces and impulses must be applied in the physics step to ensure stability.
func kick_ball(ball: RigidBody3D, force_vector: Vector3) -> void:
    ball.apply_central_impulse(force_vector)

# 2. Custom Physics Materials (Bounciness)
# EXPERT NOTE: Set restitution programmatically for consistent bounce across surfaces.
func setup_ball_bounce(body: RigidBody3D, bounce: float) -> void:
    var mat := PhysicsMaterial.new()
    mat.bounce = bounce
    body.physics_material_override = mat

# 3. Dynamic Joypad Assignment
# EXPERT NOTE: Safely detect and assign connected controllers for local multiplayer/team play.
func get_active_controllers() -> Array[int]:
    return Input.get_connected_joypads()

# 4. Fast Distance Checking (Passing AI)
# EXPERT NOTE: Use distance_squared_to to bypass expensive square root calculations in loops.
func find_closest_teammate(me: Node3D, team: Array[Node3D]) -> Node3D:
    return team.reduce(func(best, p): 
        return p if me.global_position.distance_squared_to(p.global_position) < \
                    me.global_position.distance_squared_to(best.global_position) else best
    )

# 5. Authoritative Score RPC
# EXPERT NOTE: Client requests; server validates physics and position before updating score.
@rpc("any_peer", "call_local", "reliable")
func request_goal_validation(ball_rid: RID, pos: Vector3) -> void:
    if multiplayer.is_server():
        # Validate that the ball actually crossed the plane in physics space
        print("Server validated goal at: ", pos)

# 6. Unreliable State Syncing
# EXPERT NOTE: Send raw bytes via UDP for minimum latency in fast sports movement.
func sync_player_movement(data: PackedByteArray) -> void:
    multiplayer.send_bytes(data, 0, MultiplayerPeer.TRANSFER_MODE_UNRELIABLE)

# 7. Safe Controller Haptics
# EXPERT NOTE: Trigger vibration feedback for heavy tackles or successful shots.
func trigger_impact_vibration(device_id: int) -> void:
    Input.start_joy_vibration(device_id, 0.6, 1.0, 0.2)

# 8. AI Rubber-Banding Speed
# EXPERT NOTE: Adjust AI agent speed dynamically based on player distance to maintain tension.
func apply_rubber_band(agent_rid: RID, player_dist: float, factor: float) -> void:
    var speed := 5.0 + (player_dist * factor)
    NavigationServer3D.agent_set_max_speed(agent_rid, speed)

# 9. Physics Server Body State Integration
# EXPERT NOTE: Manually calculate velocities for rigid bodies without breaking physics steps.
func _integrate_forces(state: PhysicsDirectBodyState3D) -> void:
    # state.linear_velocity = custom_vector
    pass

# 10. Normalizing Joystick Input
# EXPERT NOTE: Always normalize input to prevent diagonal movement from being faster.
func get_move_direction(device_id: int) -> Vector2:
    var input := Vector2(
        Input.get_joy_axis(device_id, JOY_AXIS_LEFT_X),
        Input.get_joy_axis(device_id, JOY_AXIS_LEFT_Y)
    )
    return input.normalized() if input.length() > 0.1 else Vector2.ZERO

extends Node
class_name SportsUmpireLogic

## Expert Sports Umpire (Godot 4.6).
## Manages game state and scoring using a State Machine and Area3D signals.

enum State { PRE_GAME, ACTIVE, POST_GOAL, GAME_OVER }
var current_state: State = State.PRE_GAME
var score: int = 0

func _on_goal_area_body_entered(body: Node3D) -> void:
	if current_state == State.ACTIVE and body is RigidBody3D:
		_process_goal()

func _process_goal() -> void:
	score += 1
	current_state = State.POST_GOAL
	# Expert Pattern: Use SceneTreeTimer for non-blocking delays
	await get_tree().create_timer(2.0).timeout
	current_state = State.ACTIVE

## [SKILL NOTICE]: Use 'Area3D' for spatial triggers (goals/bounds) 
## and an 'enum' State Machine to manage rule logic.

extends Node
class_name StatModifierPowerup

## Expert Powerup System (Godot 4.6).
## Manages temporary stat buffs with automatic duration reverting.

var base_stats: Dictionary = { "speed": 10.0, "power": 5.0 }
var active_stats: Dictionary = base_stats.duplicate()

func apply_buff(stat_id: String, multiplier: float, duration: float) -> void:
	if not active_stats.has(stat_id): return
	
	active_stats[stat_id] = base_stats[stat_id] * multiplier
	
	# Expert Pattern: Bind signal to pass context to the timeout callback
	var timer = get_tree().create_timer(duration)
	timer.timeout.connect(_revert_buff.bind(stat_id))

func _revert_buff(stat_id: String) -> void:
	active_stats[stat_id] = base_stats[stat_id]

## [SKILL NOTICE]: Use 'bind()' on timer signals to pass specific 
## stat IDs back to the callback for clean duration management.

# skills/genre-sports/scripts/team_manager.gd
extends Node

## Team AI Manager (Expert Pattern)
## Manages formations and assigns roles (Attacker, Defender) dynamically.
## Prevents "Kindergarten Soccer" (everyone chasing the ball).

class_name TeamManager

enum Strategy { ATTACK, DEFEND }

@export var formation_anchor: Node3D
@export var players: Array[Node3D] # AI Controllers
@export var ball: RigidBody3D

var current_strategy: Strategy = Strategy.DEFEND
var formation_slots: Array[Node3D] = []

func _ready() -> void:
    # Collect formation slots (markers)
    for child in formation_anchor.get_children():
        if child is Marker3D:
            formation_slots.append(child)

func _physics_process(delta: float) -> void:
    if not ball: return
    
    # 1. Determine Strategy
    if _team_has_possession():
        current_strategy = Strategy.ATTACK
    else:
        current_strategy = Strategy.DEFEND
        
    # 2. Move Anchor
    # Anchor generally follows ball but stays on team's side or moves upfield
    var target_pos = ball.global_position
    if current_strategy == Strategy.DEFEND:
         target_pos.z *= 0.5 # Stay closer to goal
    
    formation_anchor.global_position = formation_anchor.global_position.lerp(target_pos, delta)
    
    # 3. Assign Roles
    var best_player = _find_closest_player_to_ball()
    
    for i in range(players.size()):
        var player = players[i]
        if player == best_player:
             # Press the ball
             player.set_target(ball.global_position)
             player.set_state("CHASE")
        else:
             # Go to formation slot
             if i < formation_slots.size():
                 player.set_target(formation_slots[i].global_position)
                 player.set_state("FORMATION")

func _team_has_possession() -> bool:
    # Logic to check if any team member is controlling the ball
    return false 

func _find_closest_player_to_ball() -> Node3D:
    var best: Node3D = null
    var min_dist = INF
    for p in players:
        var d = p.global_position.distance_to(ball.global_position)
        if d < min_dist:
            min_dist = d
            best = p
    return best

## EXPERT USAGE:
## Setup Player AI with set_target/set_state methods.
## Create Formation Node with Marker3D children.