add burnout particles

scenes/burnout.tscn

@@ -0,0 +1,29 @@
+[gd_scene load_steps=3 format=3 uid="uid://dilif5od0ipli"]
+
+[sub_resource type="Curve" id="Curve_sh5h6"]
+_data = [Vector2(0, 0.10989), 0.0, 0.944297, 0, 0, Vector2(1, 1), 0.56508, 0.0, 0, 0]
+point_count = 2
+
+[sub_resource type="Gradient" id="Gradient_65fx1"]
+colors = PackedColorArray(0, 0, 0, 1, 0, 0, 0, 0)
+
+[node name="CPUParticles2D" type="CPUParticles2D"]
+z_index = 9
+position = Vector2(-11, -7)
+emitting = false
+amount = 100
+lifetime = 2.0
+emission_shape = 1
+emission_sphere_radius = 1.0
+direction = Vector2(-1, 0)
+spread = 10.0
+gravity = Vector2(0, 0)
+initial_velocity_min = 100.0
+initial_velocity_max = 150.0
+damping_min = 100.0
+damping_max = 500.0
+scale_amount_min = 10.0
+scale_amount_max = 10.0
+scale_amount_curve = SubResource("Curve_sh5h6")
+color = Color(0.0901961, 0.0901961, 0.0901961, 0.454902)
+color_ramp = SubResource("Gradient_65fx1")

scenes/car.tscn

@@ -1,4 +1,4 @@
-[gd_scene load_steps=49 format=3 uid="uid://0g7qqh7naniv"]
+[gd_scene load_steps=50 format=3 uid="uid://0g7qqh7naniv"]
 
 [ext_resource type="Script" path="res://scripts/car_node.gd" id="1_0tin3"]
 [ext_resource type="Script" path="res://scripts/car.gd" id="1_i5tet"]
@@ -6,6 +6,7 @@
 [ext_resource type="Texture2D" uid="uid://e5aeyl47wi8p" path="res://sprites/car_body.png" id="4_lps13"]
 [ext_resource type="Script" path="res://scripts/tiretrails.gd" id="5_4geqi"]
 [ext_resource type="Script" path="res://scripts/label_round.gd" id="5_vheit"]
+[ext_resource type="PackedScene" uid="uid://dilif5od0ipli" path="res://scenes/burnout.tscn" id="6_nxxrr"]
 [ext_resource type="PackedScene" uid="uid://dl7r8s5sxyvlw" path="res://scenes/enginesound.tscn" id="6_v21se"]
 [ext_resource type="AudioStream" uid="uid://dq5rei2w1isu4" path="res://sounds/crash/Car_Crash_01.mp3" id="7_7erwn"]
 [ext_resource type="AudioStream" uid="uid://c80nrd7syf2do" path="res://sounds/crash/Car_Crash_02.mp3" id="8_v77t5"]
@@ -161,6 +162,11 @@ script = ExtResource("5_4geqi")
 position = Vector2(10, 7)
 script = ExtResource("5_4geqi")
 
+[node name="Burnout_Left" parent="CharacterBody_Car" instance=ExtResource("6_nxxrr")]
+
+[node name="Burnout_Right" parent="CharacterBody_Car" instance=ExtResource("6_nxxrr")]
+position = Vector2(-11, 7)
+
 [node name="Line2D" type="Line2D" parent="CharacterBody_Car"]
 width_curve = SubResource("Curve_qs34t")
 

scripts/car.gd

@@ -52,6 +52,9 @@ var resetcar_movingspeed=resetcar_stoppedspeed+10 #stop timer when above this sp
 var resetcar_distance=128 #196 is roughly when car is in the middle of a two wide road
 var resetcar_steerangle=120
 
+#Effects
+const BURNOUT_KEEP_ON_AFTER_START=1
+
 
 #Variables
 var running=false
@@ -63,6 +66,9 @@ var autoreset=false
 
 var autosteer_enabled=false
 
+
+var burnout:float=0 #at 0 is off
+
 @onready var ray_cast_fl: RayCast2D = $RayCast_FL
 @onready var ray_cast_fr: RayCast2D = $RayCast_FR
 @onready var reset_timer: Timer = $resetTimer
@@ -93,6 +99,14 @@ func _physics_process(delta: float) -> void:
 	velocity +=acceleration*delta
 	#velocity = transform.x * 200
 	#vel = move_and_slide()
+	
+	if burnout>0:
+		$Burnout_Left.emitting=true
+		$Burnout_Right.emitting=true
+	else:
+		$Burnout_Left.emitting=false
+		$Burnout_Right.emitting=false
+	
 	move_and_slide()
 	
 	for i in get_slide_collision_count():
@@ -117,9 +131,12 @@ func _physics_process(delta: float) -> void:
 	if velocity.length() > resetcar_movingspeed:
 		reset_timer.stop()
 		
-		
-	enginesound.setCarSpeed(velocity.length())
-	enginesound.setCarAcceleration(applied_engine_power/engine_power,delta)
+	if running:
+		enginesound.setCarSpeed(velocity.length())
+		enginesound.setCarAcceleration(applied_engine_power/engine_power,delta)
+	else: #at start or end of round
+		enginesound.setCarSpeed(burnout*500)
+		enginesound.setCarAcceleration(1.0,delta)
 	#print("Car Accel="+str(acceleration.length()) +"/"+str(engine_power))
 
 
@@ -171,8 +188,10 @@ func get_input(delta:float):
 		
 		
 	applied_engine_power=0
-	if running:
-		if Input.is_action_pressed(Gamestate.userinput_prefix+str(playerid)):
+	
+	var key_accelerator_pressed=Input.is_action_pressed(Gamestate.userinput_prefix+str(playerid))
+	if key_accelerator_pressed:
+		if running:
 			#velocity = transform.x * 500
 			applied_engine_power=engine_power
 			
@@ -182,10 +201,13 @@ func get_input(delta:float):
 				collision_enable_timer.start()
 			
 			if autoreset:
-				print("Cancel autoreset")
 				autoreset=false
-		#if Input.is_action_pressed("ui_down"):
-			#acceleration = transform.x * braking
+				
+	if not running and finalTime==-1 and key_accelerator_pressed: #at start
+		burnout=min(1.0,burnout+1.0*delta)
+	else:
+		burnout=max(0,burnout-1.0/BURNOUT_KEEP_ON_AFTER_START*delta)
+	
 	
 	acceleration = transform.x * applied_engine_power
 		

scripts/tiretrails.gd

@@ -38,6 +38,6 @@ func setSliding(psliding:bool):
 		curve.add_point(Vector2(1,0),-5,0,Curve.TANGENT_FREE,Curve.TANGENT_FREE)
 		currentTrail.width_curve=curve
 		currentTrail.set_as_top_level(true)
-		currentTrail.z_index=9 #above road, behind car
+		currentTrail.z_index=8 #above road, behind car
 		
 	isSliding=psliding