Merge pull request godotengine#8473 from chocola-mint/master

Remove outdated C++ tutorial in "Your first 2D game"

Author: skyace65

getting_started/first_2d_game/03.coding_the_player.rst

@@ -45,43 +45,6 @@ Start by declaring the member variables this object will need:
         public Vector2 ScreenSize; // Size of the game window.
     }
 
- .. code-tab:: cpp
-
-    // A `player.gdns` file has already been created for you. Attach it to the Player node.
-
-    // Create two files `player.cpp` and `player.hpp` next to `entry.cpp` in `src`.
-    // This code goes in `player.hpp`. We also define the methods we'll be using here.
-    #ifndef PLAYER_H
-    #define PLAYER_H
-
-    #include <AnimatedSprite2D.hpp>
-    #include <Area2D.hpp>
-    #include <CollisionShape2D.hpp>
-    #include <Godot.hpp>
-    #include <Input.hpp>
-
-    class Player : public godot::Area2D {
-        GODOT_CLASS(Player, godot::Area2D)
-
-        godot::AnimatedSprite2D *_animated_sprite;
-        godot::CollisionShape2D *_collision_shape;
-        godot::Input *_input;
-        godot::Vector2 _screen_size; // Size of the game window.
-
-    public:
-        real_t speed = 400; // How fast the player will move (pixels/sec).
-
-        void _init() {}
-        void _ready();
-        void _process(const double p_delta);
-        void start(const godot::Vector2 p_position);
-        void _on_body_entered(godot::Node2D *_body);
-
-        static void _register_methods();
-    };
-
-    #endif // PLAYER_H
-
 Using the ``export`` keyword on the first variable ``speed`` allows us to set
 its value in the Inspector. This can be handy for values that you want to be
 able to adjust just like a node's built-in properties. Click on the ``Player``
@@ -121,18 +84,6 @@ a good time to find the size of the game window:
         ScreenSize = GetViewportRect().Size;
     }
 
- .. code-tab:: cpp
-
-    // This code goes in `player.cpp`.
-    #include "player.hpp"
-
-    void Player::_ready() {
-        _animated_sprite = get_node<godot::AnimatedSprite2D>("AnimatedSprite2D");
-        _collision_shape = get_node<godot::CollisionShape2D>("CollisionShape2D");
-        _input = godot::Input::get_singleton();
-        _screen_size = get_viewport_rect().size;
-    }
-
 Now we can use the ``_process()`` function to define what the player will do.
 ``_process()`` is called every frame, so we'll use it to update elements of our
 game, which we expect will change often. For the player, we need to do the
@@ -245,23 +196,6 @@ which returns ``true`` if it's pressed or ``false`` if it isn't.
         }
     }
 
- .. code-tab:: cpp
-
-    // This code goes in `player.cpp`.
-    void Player::_process(const double p_delta) {
-        godot::Vector2 velocity(0, 0);
-
-        velocity.x = _input->get_action_strength("move_right") - _input->get_action_strength("move_left");
-        velocity.y = _input->get_action_strength("move_down") - _input->get_action_strength("move_up");
-
-        if (velocity.length() > 0) {
-            velocity = velocity.normalized() * speed;
-            _animated_sprite->play();
-        } else {
-            _animated_sprite->stop();
-        }
-    }
-
 We start by setting the ``velocity`` to ``(0, 0)`` - by default, the player
 should not be moving. Then we check each input and add/subtract from the
 ``velocity`` to obtain a total direction. For example, if you hold ``right`` and
@@ -308,14 +242,6 @@ the ``_process`` function (make sure it's not indented under the `else`):
             y: Mathf.Clamp(Position.Y, 0, ScreenSize.Y)
         );
 
- .. code-tab:: cpp
-
-        godot::Vector2 position = get_position();
-        position += velocity * (real_t)p_delta;
-        position.x = godot::Math::clamp(position.x, (real_t)0.0, _screen_size.x);
-        position.y = godot::Math::clamp(position.y, (real_t)0.0, _screen_size.y);
-        set_position(position);
-
 .. tip:: The `delta` parameter in the `_process()` function refers to the *frame
         length* - the amount of time that the previous frame took to complete.
         Using this value ensures that your movement will remain consistent even
@@ -370,18 +296,6 @@ movement. Let's place this code at the end of the ``_process()`` function:
             animatedSprite2D.FlipV = velocity.Y > 0;
         }
 
- .. code-tab:: cpp
-
-        if (velocity.x != 0) {
-            _animated_sprite->set_animation("walk");
-            _animated_sprite->set_flip_v(false);
-            // See the note below about boolean assignment.
-            _animated_sprite->set_flip_h(velocity.x < 0);
-        } else if (velocity.y != 0) {
-            _animated_sprite->set_animation("up");
-            _animated_sprite->set_flip_v(velocity.y > 0);
-        }
-
 .. Note:: The boolean assignments in the code above are a common shorthand for
           programmers. Since we're doing a comparison test (boolean) and also
           *assigning* a boolean value, we can do both at the same time. Consider
@@ -426,10 +340,6 @@ When you're sure the movement is working correctly, add this line to
 
     Hide();
 
- .. code-tab:: cpp
-
-    hide();
-
 Preparing for collisions
 ~~~~~~~~~~~~~~~~~~~~~~~~
 
@@ -452,21 +362,6 @@ Add the following at the top of the script. If you're using GDScript, add it aft
     [Signal]
     public delegate void HitEventHandler();
 
- .. code-tab:: cpp
-
-    // This code goes in `player.cpp`.
-    // We need to register the signal here, and while we're here, we can also
-    // register the other methods and register the speed property.
-    void Player::_register_methods() {
-        godot::register_method("_ready", &Player::_ready);
-        godot::register_method("_process", &Player::_process);
-        godot::register_method("start", &Player::start);
-        godot::register_method("_on_body_entered", &Player::_on_body_entered);
-        godot::register_property("speed", &Player::speed, (real_t)400.0);
-        // This below line is the signal.
-        godot::register_signal<Player>("hit", godot::Dictionary());
-    }
-
 This defines a custom signal called "hit" that we will have our player emit
 (send out) when it collides with an enemy. We will use ``Area2D`` to detect the
 collision. Select the ``Player`` node and click the "Node" tab next to the
@@ -505,16 +400,6 @@ this code to the function:
         GetNode<CollisionShape2D>("CollisionShape2D").SetDeferred(CollisionShape2D.PropertyName.Disabled, true);
     }
 
- .. code-tab:: cpp
-
-    // This code goes in `player.cpp`.
-    void Player::_on_body_entered(godot::Node2D *_body) {
-        hide(); // Player disappears after being hit.
-        emit_signal("hit");
-        // Must be deferred as we can't change physics properties on a physics callback.
-        _collision_shape->set_deferred("disabled", true);
-    }
-
 Each time an enemy hits the player, the signal is going to be emitted. We need
 to disable the player's collision so that we don't trigger the ``hit`` signal
 more than once.
@@ -544,13 +429,4 @@ starting a new game.
         GetNode<CollisionShape2D>("CollisionShape2D").Disabled = false;
     }
 
- .. code-tab:: cpp
-
-    // This code goes in `player.cpp`.
-    void Player::start(const godot::Vector2 p_position) {
-        set_position(p_position);
-        show();
-        _collision_shape->set_disabled(false);
-    }
-
 With the player working, we'll work on the enemy in the next lesson.

getting_started/first_2d_game/04.creating_the_enemy.rst

@@ -78,35 +78,6 @@ Add a script to the ``Mob`` like this:
         // Don't forget to rebuild the project.
     }
 
- .. code-tab:: cpp
-
-    // Copy `player.gdns` to `mob.gdns` and replace `Player` with `Mob`.
-    // Attach the `mob.gdns` file to the Mob node.
-
-    // Create two files `mob.cpp` and `mob.hpp` next to `entry.cpp` in `src`.
-    // This code goes in `mob.hpp`. We also define the methods we'll be using here.
-    #ifndef MOB_H
-    #define MOB_H
-
-    #include <AnimatedSprite2D.hpp>
-    #include <Godot.hpp>
-    #include <RigidBody2D.hpp>
-
-    class Mob : public godot::RigidBody2D {
-        GODOT_CLASS(Mob, godot::RigidBody2D)
-
-        godot::AnimatedSprite2D *_animated_sprite;
-
-    public:
-        void _init() {}
-        void _ready();
-        void _on_visible_on_screen_notifier_2d_screen_exited();
-
-        static void _register_methods();
-    };
-
-    #endif // MOB_H
-
 Now let's look at the rest of the script. In ``_ready()`` we play the animation
 and randomly choose one of the three animation types:
 
@@ -126,22 +97,6 @@ and randomly choose one of the three animation types:
         animatedSprite2D.Play(mobTypes[GD.Randi() % mobTypes.Length]);
     }
 
- .. code-tab:: cpp
-
-    // This code goes in `mob.cpp`.
-    #include "mob.hpp"
-
-    #include <RandomNumberGenerator.hpp>
-    #include <SpriteFrames.hpp>
-
-    void Mob::_ready() {
-        godot::Ref<godot::RandomNumberGenerator> random = godot::RandomNumberGenerator::_new();
-        _animated_sprite = get_node<godot::AnimatedSprite2D>("AnimatedSprite2D");
-        _animated_sprite->set_playing(true);
-        godot::PoolStringArray mob_types = _animated_sprite->get_sprite_frames()->get_animation_names();
-        _animated_sprite->set_animation(mob_types[random->randi() % mob_types.size()]);
-    }
-
 First, we get the list of animation names from the AnimatedSprite2D's ``sprite_frames``
 property. This returns an Array containing all three animation names: ``["walk",
 "swim", "fly"]``.
@@ -167,13 +122,6 @@ to the ``Mob`` and add this code:
         QueueFree();
     }
 
- .. code-tab:: cpp
-
-    // This code goes in `mob.cpp`.
-    void Mob::_on_visible_on_screen_notifier_2d_screen_exited() {
-        queue_free();
-    }
-
 This completes the `Mob` scene.
 
 With the player and enemies ready, in the next part, we'll bring them together