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Diffstat (limited to 'blog/src/g')
| -rw-r--r-- | blog/src/g/gogodot_jam3_devlog_1.md | 74 |
1 files changed, 72 insertions, 2 deletions
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  -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  -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: + + ## Brainstorm/To-do |