feat: initialized template and wrote first gameplay code

modules/wave_survival/player_body.cpp

@@ -0,0 +1,89 @@
+#include "player_body.h"
+#include "macros.h"
+#include "player_input.h"
+
+PlayerBody *PlayerBody::singleton_instance{ nullptr };
+
+void PlayerBody::_bind_methods() {
+}
+
+void PlayerBody::ready() {
+	PlayerInput *input{ cast_to<PlayerInput>(get_node(NodePath("%PlayerInput"))) };
+	input->connect(PlayerInput::sig_movement_input, callable_mp(this, &self_type::set_movement_input));
+	input->connect(PlayerInput::sig_look_input, callable_mp(this, &self_type::on_look_input));
+	input->connect(PlayerInput::sig_jump, callable_mp(this, &self_type::on_jump_input));
+	input->connect(PlayerInput::sig_run, callable_mp(this, &self_type::on_run_input));
+}
+
+void PlayerBody::process(double delta) {
+}
+
+void PlayerBody::physics_process(double delta) {
+	GETSET(velocity, {
+		Vector2 input{ this->movement_input.normalized() };
+		if (get_is_running()) {
+			input.y *= this->run_speed;
+			input.x *= this->walk_speed;
+		} else {
+			input *= this->walk_speed;
+		}
+		velocity = velocity.move_toward(Vector3{ input.y * get_global_basis().get_column(2) + input.x * get_global_basis().get_column(0) } + Vector3{ 0.f, velocity.y, 0.f }, delta * this->acceleration);
+		velocity += get_gravity() * delta;
+	});
+	move_and_slide();
+}
+
+void PlayerBody::set_movement_input(Vector2 state) {
+	this->movement_input = state;
+}
+
+void PlayerBody::on_look_input(Vector2 look) {
+	rotate_y(look.x);
+}
+
+void PlayerBody::on_jump_input() {
+	if (this->is_on_floor()) {
+		GETSET(velocity, {
+			velocity.y = this->jump_strength;
+		});
+	}
+}
+
+void PlayerBody::on_run_input(bool run) {
+	this->try_running = run;
+}
+
+void PlayerBody::_notification(int what) {
+	if (Engine::get_singleton()->is_editor_hint()) {
+		return; // don't run in editor
+	}
+	switch (what) {
+		default:
+			return;
+		case NOTIFICATION_ENTER_TREE:
+			singleton_instance = this;
+			return;
+		case NOTIFICATION_EXIT_TREE:
+			singleton_instance = nullptr;
+			return;
+		case NOTIFICATION_READY:
+			set_process(true);
+			set_physics_process(true);
+			ready();
+			return;
+		case NOTIFICATION_PROCESS:
+			process(get_process_delta_time());
+			return;
+		case NOTIFICATION_PHYSICS_PROCESS:
+			physics_process(get_physics_process_delta_time());
+			return;
+	}
+}
+
+PlayerBody *PlayerBody::get_singleton() {
+	return singleton_instance;
+}
+
+bool PlayerBody::get_is_running() const {
+	return this->try_running && this->movement_input.y > 0.f;
+}