Reworked weapons and projectiles

game/entities/explosions/blast.gd

@@ -0,0 +1,61 @@
+class_name Blast
+extends Area2D
+
+
+const FALLOFF_FACTOR = 3
+
+
+@export var damage : AbstractDamage
+@export var shape : CircleShape2D
+
+
+@onready var collision : CollisionShape2D = $CollisionShape2D
+
+
+func _ready() -> void:
+	if collision and shape:
+		collision.shape = shape
+
+
+func get_damage_to(body: Node2D) -> AbstractDamage:
+	var distance := _get_distance_to(body)
+	var damage_dub := damage.duplicate()
+	
+	var factor := _get_damage_factor(distance)
+	damage_dub.value = round(damage_dub.value * factor)
+	return damage_dub
+
+
+func _get_distance_to(body: Node2D) -> float:
+	if not shape: return INF
+	
+	var space_state := get_world_2d().direct_space_state
+	var query := PhysicsShapeQueryParameters2D.new()
+	var circle_shape := CircleShape2D.new()
+	query.shape = circle_shape
+	query.transform = Transform2D(0, global_position)
+	query.collide_with_areas = false
+	query.collide_with_bodies = true
+	query.collision_mask = collision_mask
+	query.exclude = [self]
+	
+	#TODO optimize by binary search
+	for radius in range(shape.radius + 1):
+		circle_shape.radius = radius
+		
+		var results := space_state.intersect_shape(query)
+		
+		for result in results:
+			if result["collider"] == body:
+				return radius
+	
+	return INF
+
+
+func _get_damage_factor(distance: float) -> float:
+	if not shape: return 0.0
+	
+	var coef := distance / shape.radius
+	if coef > 1:
+		return 0.0
+	return 1 - coef * coef * coef

game/entities/explosions/blast.gd.uid

@@ -0,0 +1 @@
+uid://clt20ebs6shkm

game/entities/explosions/blast.tscn

@@ -0,0 +1,8 @@
+[gd_scene load_steps=2 format=3 uid="uid://pfvs7wqrnn08"]
+
+[ext_resource type="Script" uid="uid://clt20ebs6shkm" path="res://game/entities/explosions/blast.gd" id="1_2fpxy"]
+
+[node name="Blast" type="Area2D"]
+script = ExtResource("1_2fpxy")
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="."]

game/entities/explosions/explosion_particles.gd

@@ -0,0 +1,39 @@
+class_name ExplosionParticles
+extends Node2D
+
+
+signal finished
+
+
+@export var process_material: ParticleProcessMaterial
+@export_range(0, 1) var amount_ratio: float = 1
+
+
+var _emiting_count := 0
+
+var emitting : bool = false:
+	set(value):
+		emitting = value
+		if particles_huge: particles_huge.emitting  = emitting; _emiting_count += 1
+		if particles_large: particles_large.emitting = emitting; _emiting_count += 1
+		if particles_medium: particles_medium.emitting = emitting; _emiting_count += 1
+
+
+@onready var particles_huge : GPUParticles2D = $ParticlesHuge
+@onready var particles_large : GPUParticles2D = $ParticlesLarge
+@onready var particles_medium : GPUParticles2D = $ParticlesMedium
+
+
+func _ready() -> void:
+	particles_huge.amount_ratio = amount_ratio
+	particles_large.amount_ratio = amount_ratio
+	particles_medium.amount_ratio = amount_ratio
+	particles_huge.process_material = process_material
+	particles_large.process_material = process_material
+	particles_medium.process_material = process_material
+
+
+func _on_particles_finished() -> void:
+	_emiting_count -= 1
+	if _emiting_count == 0:
+		finished.emit()

game/entities/explosions/explosion_particles.gd.uid

@@ -0,0 +1 @@
+uid://dhnjdam04g4tb

game/entities/explosions/explosion_particles.tscn

@@ -0,0 +1,47 @@
+[gd_scene load_steps=6 format=3 uid="uid://bhxib2ltpkcbf"]
+
+[ext_resource type="Texture2D" uid="uid://gh7mwehpqfco" path="res://particle_textures/flame_medium.tres" id="1_6awlt"]
+[ext_resource type="Script" uid="uid://dhnjdam04g4tb" path="res://game/entities/explosions/explosion_particles.gd" id="1_w1d42"]
+[ext_resource type="Texture2D" uid="uid://b13al44e8ofsx" path="res://particle_textures/flame_large.tres" id="2_w1d42"]
+[ext_resource type="Texture2D" uid="uid://blp4o1c7y66wv" path="res://particle_textures/flame_huge.tres" id="3_lplfr"]
+
+[sub_resource type="ParticleProcessMaterial" id="ParticleProcessMaterial_w1d42"]
+lifetime_randomness = 0.2
+particle_flag_disable_z = true
+emission_shape = 1
+emission_sphere_radius = 1.0
+angle_min = -179.99998
+angle_max = 180.00002
+spread = 180.0
+gravity = Vector3(0, 0, 0)
+turbulence_enabled = true
+turbulence_noise_speed = Vector3(0.1, 0.1, 0.1)
+
+[node name="ExplosionParticles" type="Node2D"]
+script = ExtResource("1_w1d42")
+process_material = SubResource("ParticleProcessMaterial_w1d42")
+
+[node name="ParticlesMedium" type="GPUParticles2D" parent="."]
+emitting = false
+amount = 512
+texture = ExtResource("1_6awlt")
+lifetime = 0.25
+one_shot = true
+
+[node name="ParticlesLarge" type="GPUParticles2D" parent="."]
+emitting = false
+amount = 512
+texture = ExtResource("2_w1d42")
+lifetime = 0.25
+one_shot = true
+
+[node name="ParticlesHuge" type="GPUParticles2D" parent="."]
+emitting = false
+amount = 512
+texture = ExtResource("3_lplfr")
+lifetime = 0.25
+one_shot = true
+
+[connection signal="finished" from="ParticlesMedium" to="." method="_on_particles_finished"]
+[connection signal="finished" from="ParticlesLarge" to="." method="_on_particles_finished"]
+[connection signal="finished" from="ParticlesHuge" to="." method="_on_particles_finished"]