From 2bdced47eac5ac4dae6e3b5f8be232e9a30f44ff Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ensar=20Saraj=C4=8Di=C4=87?= <es.ensar@gmail.com>
Date: Sat, 13 Nov 2021 22:48:15 +0100
Subject: [PATCH] Add tire sounds

---
 default_env.tres         |  2 ++
 vehicles/buggy.gd        |  2 +-
 vehicles/tire_smoke.gd   | 19 +++++++++++++++++++
 vehicles/tire_smoke.tscn | 11 ++++++++++-
 4 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/default_env.tres b/default_env.tres
index d6796c3..23b503a 100644
--- a/default_env.tres
+++ b/default_env.tres
@@ -5,4 +5,6 @@
 [resource]
 background_mode = 2
 background_sky = SubResource( 1 )
+fog_enabled = true
+fog_depth_end = 482.6
 dof_blur_far_distance = 136.42
diff --git a/vehicles/buggy.gd b/vehicles/buggy.gd
index c6f413e..8664146 100644
--- a/vehicles/buggy.gd
+++ b/vehicles/buggy.gd
@@ -148,7 +148,7 @@ func _physics_process(delta: float):
 	steering = steering_input * lerp(max_steer_angle_rad, speed_steer_angle_rad, steer_speed_factor)
 
 func _generate_engine_sound(rpm_factor):
-	engine_sound_player.pitch_scale = BASE_ENGINE_PITCH + rpm_factor
+	engine_sound_player.pitch_scale = BASE_ENGINE_PITCH + 2 * rpm_factor
 	var to_fill = engine_sound_playback.get_frames_available()
 	var factor = rpm_factor
 	if to_fill <= 0:
diff --git a/vehicles/tire_smoke.gd b/vehicles/tire_smoke.gd
index bca2670..f478f7b 100644
--- a/vehicles/tire_smoke.gd
+++ b/vehicles/tire_smoke.gd
@@ -1,8 +1,27 @@
 class_name TireSmoke
 extends Particles
 
+onready var sound_player: AudioStreamPlayer3D = $tire_sound_player
+onready var sound_playback: AudioStreamPlayback = $tire_sound_player.get_stream_playback()
+
+func _ready() -> void:
+	_update_sound(1)
+	# sound_player.play()
+
 func update(skidinfo: float) -> void:
+	_update_sound(skidinfo)
 	if skidinfo < 0.5:
 		emitting = true
 	else:
 		emitting = false
+
+func _update_sound(skidinfo: float) -> void:
+	sound_player.pitch_scale = 1 + (1 - skidinfo)
+	var to_fill = sound_playback.get_frames_available()
+	var factor = (1 - skidinfo) * 2
+	if to_fill <= 0:
+		return
+	while to_fill > 0:
+		sound_playback.push_frame(Vector2(1.0, 1.0) * factor)
+		factor += sin(factor) * 2
+		to_fill -= 1
diff --git a/vehicles/tire_smoke.tscn b/vehicles/tire_smoke.tscn
index 98fcf88..198fed4 100644
--- a/vehicles/tire_smoke.tscn
+++ b/vehicles/tire_smoke.tscn
@@ -1,4 +1,4 @@
-[gd_scene load_steps=7 format=2]
+[gd_scene load_steps=8 format=2]
 
 [ext_resource path="res://vehicles/tire_smoke.gd" type="Script" id=1]
 
@@ -25,6 +25,9 @@ material = SubResource( 4 )
 radial_segments = 4
 rings = 4
 
+[sub_resource type="AudioStreamGenerator" id=6]
+mix_rate = 5500.0
+
 [node name="tire_smoke" type="Particles"]
 transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, -0.541801, 0 )
 emitting = false
@@ -34,3 +37,9 @@ local_coords = false
 process_material = SubResource( 3 )
 draw_pass_1 = SubResource( 5 )
 script = ExtResource( 1 )
+
+[node name="tire_sound_player" type="AudioStreamPlayer3D" parent="."]
+stream = SubResource( 6 )
+unit_db = 25.0
+unit_size = 2.0
+area_mask = 2