From 65be853fff43b8b0203856fe98b64c190fd271f2 Mon Sep 17 00:00:00 2001 From: David Luevano Alvarado Date: Thu, 2 Jun 2022 02:44:18 -0600 Subject: update gogodot jam3 entry with food system --- blog/dst/g/gogodot_jam3_devlog_1.html | 62 ++++++++++++++++- blog/dst/index.html | 2 +- blog/dst/tag/@english.html | 2 +- blog/dst/tag/@gamedev.html | 2 +- blog/dst/tag/@gamejam.html | 2 +- blog/dst/tag/@godot.html | 2 +- blog/src/g/gogodot_jam3_devlog_1.md | 74 ++++++++++++++++++++- .../gogodot_jam3/snake_food_basic_interaction.gif | Bin 0 -> 385400 bytes 8 files changed, 136 insertions(+), 10 deletions(-) create mode 100755 static/images/g/gogodot_jam3/snake_food_basic_interaction.gif diff --git a/blog/dst/g/gogodot_jam3_devlog_1.html b/blog/dst/g/gogodot_jam3_devlog_1.html index 9d6e945..92480c4 100644 --- a/blog/dst/g/gogodot_jam3_devlog_1.html +++ b/blog/dst/g/gogodot_jam3_devlog_1.html @@ -216,7 +216,7 @@ func _on_Head_snake_path_new_point(coordinates: Vector2) -> void: Snake - Basic movement with all body parts
Snake - Basic movement with all body parts
-

Now, we need to handle adding body parts after the snake is complete and already moved for a bit, this will require a queue so we can add part by part in the case that we eat multiple pieces of food in a short period of time. For this we need to add some signals: snake_add_new_segment(type), snake_added_new_segment(type), snake_added_initial_segments and use them when makes sense. Now we need to add the following:

+

Now, we need to handle adding body parts after the snake is complete and already moved for a bit, this will require a queue so we can add part by part in the case that we eat multiple pieces of food in a short period of time. For this we need to add some signals: snake_adding_new_segment(type), snake_added_new_segment(type), snake_added_initial_segments and use them when makes sense. Now we need to add the following:

var body_segment_stack: Array
 var tail_segment: PathFollow2D
 # didn't konw how to name this, basically holds the current path lenght
@@ -259,7 +259,63 @@ func _add_segment_to_queue() -> void:
 Snake - Basic movement with dynamic addition of new segments
 
Snake - Basic movement with dynamic addition of new segments

 
-
For now, this should be enough, I’ll add more stuff as needed as I go.

+
For now, this should be enough, I’ll add more stuff as needed as I go. Last thing is that after finished testing that the movement felt ok, I just added a way to stop the snake whenever it collides with itself by using the following code (and the signal snake_segment_body_entered(body)) in a main.gd script that is the entry point for the game:

+
func _snake_disabled(on_off: bool) -> void:
+    _snake.propagate_call("set_process", [on_off])
+    _snake.propagate_call("set_process_internal", [on_off])
+    _snake.propagate_call("set_physics_process", [on_off])
+    _snake.propagate_call("set_physics_process_internal", [on_off])
+    _snake.propagate_call("set_process_input", [on_off])
+

+
Which will stop the snake node and all children.

+
The food

+
For now I just decided to setup a simple system to see everything works fine. The idea is to make some kind of generic food node/scene and a “food manager” to spawn them, for now in totally random locations. For this I added the following signals: food_placing_new_food(type), food_placed_new_food(type) and food_eaten(type).

+
First thing is creating the Food.tscn which is just an Area2D with its necessary children with an attached script called food.gd. The script is really simple:

+
class_name Food # needed to access Type enum outside of the script, this registers this script as a node
+extends Area2D
+
+enum Type {
+    APPLE
+}
+
+var _type_texture: Dictionary = {
+    Type.APPLE: preload("res://entities/food/sprites/apple.png")
+}
+
+export(Type) var TYPE
+onready var _sprite: Sprite = $Sprite
+
+
+func _ready():
+    connect("body_entered", self, "_on_body_entered")
+    _sprite.texture = _type_texture[TYPE]
+
+
+func _on_body_entered(body: Node) -> void:
+    Event.emit_signal("food_eaten", TYPE)
+    queue_free()
+

+
Then this food_eaten signal is received in snake.gd to add a new segment to the queue.

+
Finally, for the food manager I just created a FoodManager.tscn with a Node2D with an attached script called food_manager.gd. To get a random position:

+
func _get_random_pos() -> Vector2:
+    var screen_size: Vector2 = get_viewport().get_visible_rect().size
+    var temp_x: float = randf() * screen_size.x - screen_size.x / 2.0
+    var temp_y: float = randf() * screen_size.y - screen_size.y / 2.0
+
+    return Vector2(temp_x, temp_y)
+

+
Which gets the job done, but later I’ll have to add a way to check that the position is valid. And to actually place the food:

+
func _place_new_food() -> void:
+    var food: Area2D = FOOD.instance()
+    var position: Vector2 = _get_random_pos()
+    food.global_position = position
+    add_child(food)
+

+
And this is used in _process to place new food whenever needed. For now I added a condition to add food until 10 pieces are in place, and keep adding whenever the food is is lower than 10. After setting everything up, this is the result:

+

+Snake - Food basic interaction
+
Snake - Food basic interaction

+

 
Brainstorm/To-do

 
    
 
  • 
@@ -325,7 +381,7 @@ func _add_segment_to_queue() -> void:
   
    
   
    
     
    By David Luévano
    
-    
    Created: Wed, Jun 01, 2022 @ 09:21 UTC
    
+    
    Created: Thu, Jun 02, 2022 @ 08:34 UTC
    
     
    
   
    Tags:
 english, gamedev, gamejam, godot  
    
diff --git a/blog/dst/index.html b/blog/dst/index.html
index e2c0d33..d2f2da6 100644
--- a/blog/dst/index.html
+++ b/blog/dst/index.html
@@ -95,7 +95,7 @@
     
    Articles
    
   
      
         
      June 2022
      
-      
    • Jun 01 - Creating my Go Godot Jam 3 entry devlog 1
      • 
+      
    • Jun 02 - Creating my Go Godot Jam 3 entry devlog 1
      • 
           
      May 2022
      
       
    • May 29 - Creating a FlappyBird clone in Godot 3.5 devlog 1
      • 
       
    • May 22 - General Godot project structure
      • 
diff --git a/blog/dst/tag/@english.html b/blog/dst/tag/@english.html
index c250639..3fab489 100644
--- a/blog/dst/tag/@english.html
+++ b/blog/dst/tag/@english.html
@@ -81,7 +81,7 @@
     
      Articles
      
   
        
         
        June 2022
        
-      
      • Jun 01 - Creating my Go Godot Jam 3 entry devlog 1
        • 
+      
      • Jun 02 - Creating my Go Godot Jam 3 entry devlog 1
        • 
           
        May 2022
        
       
      • May 29 - Creating a FlappyBird clone in Godot 3.5 devlog 1
        • 
       
      • May 22 - General Godot project structure
        • 
diff --git a/blog/dst/tag/@gamedev.html b/blog/dst/tag/@gamedev.html
index b8640e4..ec5f50d 100644
--- a/blog/dst/tag/@gamedev.html
+++ b/blog/dst/tag/@gamedev.html
@@ -81,7 +81,7 @@
     
        Articles
        
   
          
         
          June 2022
          
-      
        • Jun 01 - Creating my Go Godot Jam 3 entry devlog 1
          • 
+      
        • Jun 02 - Creating my Go Godot Jam 3 entry devlog 1
          • 
           
          May 2022
          
       
        • May 29 - Creating a FlappyBird clone in Godot 3.5 devlog 1
          • 
       
        • May 22 - General Godot project structure
          • 
diff --git a/blog/dst/tag/@gamejam.html b/blog/dst/tag/@gamejam.html
index 7638ffb..b6a4f0d 100644
--- a/blog/dst/tag/@gamejam.html
+++ b/blog/dst/tag/@gamejam.html
@@ -81,7 +81,7 @@
     
          Articles
          
   
 
 
diff --git a/blog/dst/tag/@godot.html b/blog/dst/tag/@godot.html
index 70023e4..cce39be 100644
--- a/blog/dst/tag/@godot.html
+++ b/blog/dst/tag/@godot.html
@@ -81,7 +81,7 @@
     
          Articles
          
   
diff --git a/blog/src/g/gogodot_jam3_devlog_1.md b/blog/src/g/gogodot_jam3_devlog_1.md
index edd4868..0c177c4 100644
--- a/blog/src/g/gogodot_jam3_devlog_1.md
+++ b/blog/src/g/gogodot_jam3_devlog_1.md
@@ -170,7 +170,7 @@ Select the *Snake* node and add the *Body* and *Tail* scene to the parameters, r
 
 ![Snake - Basic movement with all body parts](images/g/gogodot_jam3/snake_basic_movement_added_body_parts.gif "Snake - Basic movement with all body parts")
 
-Now, we need to handle adding body parts after the snake is complete and already moved for a bit, this will require a queue so we can add part by part in the case that we eat multiple pieces of food in a short period of time. For this we need to add some signals: `snake_add_new_segment(type)`, `snake_added_new_segment(type)`, `snake_added_initial_segments` and use them when makes sense. Now we need to add the following:
+Now, we need to handle adding body parts after the snake is complete and already moved for a bit, this will require a queue so we can add part by part in the case that we eat multiple pieces of food in a short period of time. For this we need to add some signals: `snake_adding_new_segment(type)`, `snake_added_new_segment(type)`, `snake_added_initial_segments` and use them when makes sense. Now we need to add the following:
 
 ```gdscript
 var body_segment_stack: Array
@@ -221,7 +221,77 @@ With everything implemented and connected accordingly then we can add segments o
 
 ![Snake - Basic movement with dynamic addition of new segments](images/g/gogodot_jam3/snake_basic_movement_with_dynamic_segments.gif "Snake - Basic movement with dynamic addition of new segments")
 
-For now, this should be enough, I'll add more stuff as needed as I go.
+For now, this should be enough, I'll add more stuff as needed as I go. Last thing is that after finished testing that the movement felt ok, I just added a way to stop the snake whenever it collides with itself by using the following code (and the signal `snake_segment_body_entered(body)`) in a `main.gd` script that is the entry point for the game:
+
+```gdscript
+func _snake_disabled(on_off: bool) -> void:
+	_snake.propagate_call("set_process", [on_off])
+	_snake.propagate_call("set_process_internal", [on_off])
+	_snake.propagate_call("set_physics_process", [on_off])
+	_snake.propagate_call("set_physics_process_internal", [on_off])
+	_snake.propagate_call("set_process_input", [on_off])
+```
+
+Which will stop the snake node and all children.
+
+## The food
+
+For now I just decided to setup a simple system to see everything works fine. The idea is to make some kind of generic food node/scene and a "food manager" to spawn them, for now in totally random locations. For this I added the following signals: `food_placing_new_food(type)`, `food_placed_new_food(type)` and `food_eaten(type)`.
+
+First thing is creating the `Food.tscn` which is just an *Area2D* with its necessary children with an attached script called `food.gd`. The script is really simple:
+
+```gdscript
+class_name Food # needed to access Type enum outside of the script, this registers this script as a node
+extends Area2D
+
+enum Type {
+	APPLE
+}
+
+var _type_texture: Dictionary = {
+	Type.APPLE: preload("res://entities/food/sprites/apple.png")
+}
+
+export(Type) var TYPE
+onready var _sprite: Sprite = $Sprite
+
+
+func _ready():
+	connect("body_entered", self, "_on_body_entered")
+	_sprite.texture = _type_texture[TYPE]
+
+
+func _on_body_entered(body: Node) -> void:
+	Event.emit_signal("food_eaten", TYPE)
+	queue_free()
+```
+
+Then this `food_eaten` signal is received in `snake.gd` to add a new segment to the queue.
+
+Finally, for the food manager I just created a `FoodManager.tscn` with a *Node2D* with an attached script called `food_manager.gd`. To get a random position:
+
+```gdscript
+func _get_random_pos() -> Vector2:
+	var screen_size: Vector2 = get_viewport().get_visible_rect().size
+	var temp_x: float = randf() * screen_size.x - screen_size.x / 2.0
+	var temp_y: float = randf() * screen_size.y - screen_size.y / 2.0
+
+	return Vector2(temp_x, temp_y)
+```
+
+Which gets the job done, but later I'll have to add a way to check that the position is valid. And to actually place the food:
+
+```gdscript
+func _place_new_food() -> void:
+	var food: Area2D = FOOD.instance()
+	var position: Vector2 = _get_random_pos()
+	food.global_position = position
+	add_child(food)
+```
+
+And this is used in `_process` to place new food whenever needed. For now I added a condition to add food until 10 pieces are in place, and keep adding whenever the food is is lower than 10. After setting everything up, this is the result:
+
+![Snake - Food basic interaction](images/g/gogodot_jam3/snake_food_basic_interaction.gif "Snake - Food basic interaction")
 
 ## Brainstorm/To-do
 
diff --git a/static/images/g/gogodot_jam3/snake_food_basic_interaction.gif b/static/images/g/gogodot_jam3/snake_food_basic_interaction.gif
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