tracer - small racing game im working on


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150

extends Node3D
class_name Race

# in order of initialization
var car_scene: PackedScene
var track_loader_scene: PackedScene
var ghost_scene: PackedScene
var track_res: TrackResource
var track: TrackLoader
var data: GhostData
var best_time_data: GhostData
var car: Car
var ghost: GhostCar
var start_frame: int

var current_lap := 0
var playing := false
var timer := GameTimer.new()

const SaveLoad := preload("res://addons/@bendn/remap/private/SaveLoadUtils.gd")

signal next_lap
signal created_car(car: Car)
signal created_ghost(ghost: GhostCar)
signal finished(time: float, prev_time: float)
signal split(time: float, prev_time: float)
signal did_reset

func _init(t: TrackResource, ghost_data: GhostData, _car_scene, _ghost_scene, _track_loader_scene) -> void:
	car_scene = _car_scene
	ghost_scene = _ghost_scene
	track_loader_scene = _track_loader_scene
	track_res = t
	best_time_data = ghost_data

func mkghost() -> void:
	ghost = ghost_scene.instantiate()
	add_child(ghost)
	reset_ghost()
	created_ghost.emit(ghost)

func reset_ghost() -> void:
	if best_time_data:
		ghost.update(best_time_data.load_snap(0), -1)
		ghost.engine.volume = .1
	else:
		ghost.engine.volume = 0
		ghost.global_position = track.start_pos + Vector3(0, 2, 0) - (car.global_transform.basis.z * 2)
		ghost.rotation = track.start_rot + Vector3(0, PI, -PI/2)
	ghost.reset()
	ghost.hide()

func reset_car() -> void:
	await get_tree().physics_frame
	car.rotation = track.start_rot + Vector3(0, PI, -PI/2)
	car.global_position = track.start_pos + Vector3(0, 2, 0) - (car.global_transform.basis.z * 2) # bump forward a teensy bit
	car.linear_velocity = Vector3.ZERO
	car.angular_velocity = Vector3.ZERO
	car.current_gear = 0
	car.reset()

func mkcar() -> void:
	car = HumanCar.attach(car_scene)
	add_child(car)
	reset_car()
	created_car.emit(car)

func _ready() -> void:
	set_physics_process(false)
	track = track_loader_scene.instantiate()
	track.track = track_res
	add_child(track)
	data = GhostData.new(track_res.checkpoints.size(), track_res.laps)
	mkcar()
	mkghost()
	connect_checkpoints()
	add_child(timer)

func _input(event: InputEvent) -> void:
	if event.is_action("reset") and playing:
		reset()

func reset() -> void:
	playing = false
	if best_time_data:
		if ghost:
			reset_ghost()
	await reset_car()
	set_physics_process(false)
	current_lap = 0
	data.clear()
	timer.reset()
	did_reset.emit()

func connect_checkpoints() -> void:
	for i in len(track.checkpoints):
		track.checkpoints[i].collected.connect(passed_cp.bind(i))
	track.finish.collected.connect(passed_finish)

func passed_cp(cp: int) -> void: if playing and !data.has_collected(current_lap, cp): collect(cp)

func passed_finish() -> void:
	if !playing: return
	for i in len(data.checkpoints[current_lap]) - 1:
		if data.checkpoints[current_lap][i] < 0:
			return
	collect(-1)
	if track_res.laps - 1 == current_lap:
		print("finished")
		playing = false
		timer.stop()
		car.reset()
		if not best_time_data or data.time < best_time_data.time:
			print("new pb!")
			finished.emit(data.time, best_time_data.time if best_time_data else -1.0)
			data.save(Globals.SAVES % track_res.name)
			best_time_data = data
		else:
			finished.emit(data.time, best_time_data.time)
		data = GhostData.new(track_res.checkpoints.size(), track_res.laps)
	else:
		current_lap += 1
		next_lap.emit()

func _physics_process(delta: float) -> void:
	data.snapshot(car)
	if best_time_data:
		if best_time_data.snap_count - 1 < Engine.get_physics_frames() - start_frame:
			if ghost.visible:
				print("ran out of snaps, hiding ghost")
				ghost.hide()
			return
		ghost.update(best_time_data.load_snap(Engine.get_physics_frames() - start_frame), delta)
		ghost.visible = (ghost.global_position.distance_squared_to(car.global_position) > 10)
		ghost.engine.volume = lerpf(ghost.engine.volume, .7, delta) if (ghost.global_position.distance_squared_to(car.global_position) > 20) else lerpf(ghost.engine.volume, .2, delta * 3)

func collect(cp: int) -> void:
	if cp != -1:
		car.checkpoint_sound.play()
	var time := best_time_data.get_time(current_lap, cp) if best_time_data else -1.0
	time = best_time_data.time if (not track_res.laps or track_res.laps == current_lap + 1) and cp == -1 and time != -1.0 else time
	split.emit(timer.now(), time)
	data.collect(current_lap, cp, timer.now())

func start() -> void:
	timer.start()
	start_frame = Engine.get_physics_frames()
	playing = true
	car.start()
	set_physics_process(true)