1 files changed, 121 insertions, 0 deletions
diff --git a/Racing-Game/BackWheel.gd b/Racing-Game/BackWheel.gd
new file mode 100644
index 0000000..b5d8297
--- /dev/null
+++ b/Racing-Game/BackWheel.gd
@@ -0,0 +1,121 @@
+extends RigidBody2D
+
+#Accelerating
+var hp = 4.0
+var acceleration = 5
+var isForward = true
+
+var velocity
+
+var lastLoc = 0;
+
+var wheelSlip = Vector2(0,0);
+var isSkid = false;
+
+signal slip
+signal end
+var elapsed = 0
+#
+var gripDelay = 0
+var carAngle
+var carVector
+var velVector
+
+# Called when the node enters the scene tree for the first time.
+func _ready():
+	lastLoc = get_position_in_parent()
+	pass # Replace with function body.
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta):
+	carAngle = get_node("../../../CarBody").get_transform().get_rotation()
+	carVector = Vector2(cos(carAngle + PI/2),sin(carAngle + PI/2))
+	velVector = get_node("../../../CarBody").get_linear_velocity()
+	velocity = measure_velocity()
+	isForward = is_forward()
+	set_rotation(carAngle)
+	isSlip(delta)
+	
+#	gripDelay = has_grip(0.4,delta)
+
+	isSkid = Input.is_action_pressed("grip")
+	
+	if Input.is_action_pressed("grip") || Input.is_action_pressed("break"):
+		null_slide(max(5,velocity/7),delta)
+	else:
+		null_slide(1,delta)	
+	#Braking
+	if Input.is_action_pressed("break"):
+		if velocity > 20:
+			linear_damp = 2
+		else:
+			linear_damp = 5
+	else:
+		linear_damp = 0.01
+	
+#	createLine(lastLoc, get_position_in_parent())
+#	lastLoc = get_position_in_parent()
+	
+	if Input.is_action_pressed("forward"):
+		if !Input.is_action_pressed("break"):
+			apply_central_impulse(Vector2(0,-gear(velocity, hp, acceleration)).rotated(carAngle)*delta*5000)
+		else:
+			pass
+	elif Input.is_action_pressed("backward"):
+		if !Input.is_action_pressed("break"):
+			apply_central_impulse(Vector2(0,(1)).rotated(carAngle)*delta*5000)
+		else:
+			pass
+
+func null_slide(var strength, var delta):
+	#strength is how strong you would like the nullify to be
+	#higher is less sliding/drifting
+	var movementUnitVector = get_linear_velocity().normalized()#the direction of the velocity
+	var directionAngle = carAngle + (PI/2.0)#the angle the car is facing(relative to the world)
+	var directionUnitVector = Vector2(cos(directionAngle),sin(directionAngle)).normalized()#the direction the car is facing
+	var nullify = directionUnitVector * movementUnitVector.dot(directionUnitVector)
+	wheelSlip = (-(movementUnitVector - nullify))*strength
+	apply_central_impulse(wheelSlip*delta*5000)
+	
+func isSlip(time):
+	if (wheelSlip.length() > 0.2):
+		emit_signal("slip")
+	else:
+		emit_signal("end")
+
+#func createLine(from, to):
+#	var tires = get_node("./MyLine")
+#	tires.add_point(from)
+#	tires.add_point(to)
+	
+#func has_grip(var tractionDelay, var delta):
+#	var movementUnitVector = get_linear_velocity().normalized()#the direction of the velocity
+#	var directionAngle = carAngle#the angle the car is facing(relative to the world)
+#	var directionUnitVector = Vector2(cos(directionAngle),sin(directionAngle)).normalized()#the direction the car is facing
+#	if velocity > 10:
+#		if Input.is_action_pressed("grip"):##if pressing shift
+#			gripDelay = tractionDelay
+#		elif (gripDelay <= 0 && abs(movementUnitVector.dot(directionUnitVector)) > 0.4):#if not drifting but past steering point
+#			gripDelay = tractionDelay
+#		elif gripDelay > 0 && abs(movementUnitVector.dot(directionUnitVector)) > 0.3:#if drifting and past steering point
+#			gripDelay = tractionDelay
+#		elif gripDelay > 0:#if at recovery point and drifting
+#			gripDelay -= delta
+#	else:
+#		gripDelay = 0
+#	return gripDelay
+
+func measure_velocity():
+	return sqrt(get_linear_velocity().dot(get_linear_velocity()))/12
+
+func is_forward():#determines if the car is driving forward, or backward
+	var carVector = Vector2(cos(carAngle + PI/2),sin(carAngle + PI/2))
+	if velVector == Vector2(0,0) || carVector == Vector2(0,0):
+		return true
+	if velVector.dot(carVector) <= 0:
+		return true
+	else:
+		return false
+
+func gear(var rpm, var maxPower, var topSpeed):
+	return max(-pow((rpm/((1000/topSpeed)/sqrt(maxPower)))-sqrt(maxPower),2)+(maxPower+1),0)