Bullets Colliding and Disappearing

godot/Scenes/Weapons/bullet.tscn

@@ -1,4 +1,4 @@
-[gd_scene load_steps=3 format=3 uid="uid://do601jl7p1u22"]
+[gd_scene load_steps=6 format=3 uid="uid://do601jl7p1u22"]
 
 [sub_resource type="BoxMesh" id="BoxMesh_ibwn0"]
 size = Vector3(0.05, 0.05, 1)
@@ -9,7 +9,23 @@ emission_enabled = true
 emission = Color(0.568627, 1, 0.313726, 1)
 emission_energy_multiplier = 5.0
 
+[sub_resource type="ParticleProcessMaterial" id="ParticleProcessMaterial_618v8"]
+direction = Vector3(0, 0, 1)
+initial_velocity_min = 3.0
+initial_velocity_max = 5.0
+
+[sub_resource type="StandardMaterial3D" id="StandardMaterial3D_gn2fy"]
+albedo_color = Color(1, 1, 0.443137, 1)
+emission_enabled = true
+emission = Color(0.568627, 1, 0.313726, 1)
+emission_energy_multiplier = 8.0
+
+[sub_resource type="BoxMesh" id="BoxMesh_5un5e"]
+material = SubResource("StandardMaterial3D_gn2fy")
+size = Vector3(0.04, 0.04, 0.04)
+
 [node name="Bullet" type="Bullet"]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, -52730.2)
 
 [node name="MeshInstance3D" type="MeshInstance3D" parent="."]
 mesh = SubResource("BoxMesh_ibwn0")
@@ -17,3 +33,19 @@ surface_material_override/0 = SubResource("StandardMaterial3D_2qdhl")
 
 [node name="RayCast3D" type="RayCast3D" parent="."]
 target_position = Vector3(0, 0, -0.6)
+
+[node name="GPUParticles3D" type="GPUParticles3D" parent="."]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, -0.7)
+emitting = false
+one_shot = true
+explosiveness = 1.0
+visibility_aabb = AABB(-1.00001, -6.06334, -1.00001, 2.00002, 7.06267, 41.4102)
+process_material = SubResource("ParticleProcessMaterial_618v8")
+draw_pass_1 = SubResource("BoxMesh_5un5e")
+
+[node name="Timer" type="Timer" parent="."]
+wait_time = 10.0
+one_shot = true
+autostart = true
+
+[connection signal="timeout" from="Timer" to="." method="_on_timer_timeout"]

src/Bullet.cpp

@@ -1,4 +1,5 @@
 #include "Bullet.h"
+#include <godot_cpp/classes/timer.hpp>
 
 using namespace godot;
 
@@ -6,17 +7,40 @@ namespace blitz {
 
 static constexpr float BULLET_SPEED = 40.0f;
 
-void Bullet::_bind_methods() {}
+void Bullet::_bind_methods() {
+	ClassDB::bind_method(D_METHOD("_on_timer_timeout"), &Bullet::_on_timer_timeout);
+}
 
 Bullet::Bullet() {}
 
 Bullet::~Bullet() {}
 
-void Bullet::_ready() {}
+void Bullet::_ready() {
+	m_Particles = Object::cast_to<GPUParticles3D>(find_child("GPUParticles3D"));
+	DEV_ASSERT(m_Particles);
+	m_Ray = Object::cast_to<RayCast3D>(find_child("RayCast3D"));
+	DEV_ASSERT(m_Ray);
+	m_Mesh = Object::cast_to<MeshInstance3D>(find_child("MeshInstance3D"));
+	DEV_ASSERT(m_Mesh);
+}
 
 void Bullet::_physics_process(float a_Delta) {
 	Vector3 movement = Vector3(0, 0, -BULLET_SPEED) * a_Delta;
 	set_position(get_transform().xform(movement));
+
+	godot::Timer* timer = memnew(godot::Timer);
+	add_child(timer);
+	timer->connect("timeout", callable_mp(this, &Bullet::_on_timer_timeout));
+	if (m_Ray->is_colliding()) {
+		m_Mesh->set_visible(false);
+		m_Particles->set_emitting(true);
+		timer->set_wait_time(1.0);
+		timer->start();
+	}
+}
+
+void Bullet::_on_timer_timeout() {
+	queue_free();
 }
 
 }  // namespace blitz

src/Bullet.h

@@ -1,6 +1,9 @@
 #pragma once
 
+#include <godot_cpp/classes/gpu_particles3d.hpp>
+#include <godot_cpp/classes/mesh_instance3d.hpp>
 #include <godot_cpp/classes/node3d.hpp>
+#include <godot_cpp/classes/ray_cast3d.hpp>
 
 namespace blitz {
 class Bullet : public godot::Node3D {
@@ -14,6 +17,13 @@ class Bullet : public godot::Node3D {
 
 	void _ready();
 	void _physics_process(float delta);
+
+  private:
+	godot::GPUParticles3D* m_Particles;
+	godot::RayCast3D* m_Ray;
+	godot::MeshInstance3D* m_Mesh;
+
+	void _on_timer_timeout();
 };
 
 }  // namespace blitz