extends GPUParticles3D

func _ready() -> void:
	amount = 80
	lifetime = 1.5
	emitting = false
	local_coords = false

	var mat := ParticleProcessMaterial.new()
	mat.direction = Vector3(0.0, 0.3, 0.0)
	mat.initial_velocity_min = 0.5
	mat.initial_velocity_max = 1.5
	mat.spread = 15.0
	mat.gravity = Vector3(0.0, 0.5, 0.0)
	mat.scale_min = 0.03
	mat.scale_max = 0.12

	var scale_curve := Curve.new()
	scale_curve.add_point(Vector2(0.0, 0.2))
	scale_curve.add_point(Vector2(0.5, 1.0))
	scale_curve.add_point(Vector2(1.0, 0.0))
	var scale_curve_tex := CurveTexture.new()
	scale_curve_tex.curve = scale_curve
	mat.scale_curve = scale_curve_tex

	mat.color = Color(1.0, 1.0, 1.0, 0.6)
	process_material = mat

	var sphere := SphereMesh.new()
	sphere.radius = 0.05
	sphere.height = 0.1
	sphere.rings = 4
	sphere.radial_segments = 6

	var bubble_mat := StandardMaterial3D.new()
	bubble_mat.shading_mode = BaseMaterial3D.SHADING_MODE_UNSHADED
	bubble_mat.transparency = BaseMaterial3D.TRANSPARENCY_ALPHA
	bubble_mat.albedo_color = Color(1.0, 1.0, 1.0, 0.55)
	bubble_mat.emission_enabled = true
	bubble_mat.emission = Color(0.8, 0.9, 1.0, 1.0)
	bubble_mat.emission_energy_multiplier = 0.3
	sphere.surface_set_material(0, bubble_mat)

	draw_pass_1 = sphere


func set_intensity(speed_factor: float) -> void:
	if speed_factor > 0.5:
		emitting = true
		amount_ratio = clamp(speed_factor / 1.5, 0.3, 1.0)
	else:
		emitting = false