Simple CardPileUI

This plugin provides a flexible and customizable card pile user interface for the Godot game engine. It is designed to handle various card-related functionalities including drawing, discarding, and managing different piles.

Screenshot

Screenshot2

Features
Installation
Getting Started
Concepts
Documentation
Thanks
Changelog

Features:

⚙️ Configurable Parameters : Easily customize the behavior of the card pile UI using exported parameters, such as card speed, maximum hand size, display and more.
📂 Simple JSON Loading: Load card data from a JSON file to populate the card pile.
🗃️ Intuitive Pile Management: Manage different card piles, including draw, hand, discard.
🎉 Fun UI Elements: Card interaction is snappy, responsive, and fun out-of-the box, allowing you to skip the boring setup and get started with your game.

Installation

Download latest release
Unpack the addons/simple_card_pile_ui folder into your /addons folder within the Godot project
Enable this addon within the Godot settings: Project > Project Settings > Plugins

Getting Started

Create a script extending CardUIData that describes any custom properties your card will need. You can utlize inheritance here as needed.
Create a JSON database of your card information (example).
Create a JSON collection of your cards (example).
Create a new scene with root type CardUI - this is the object that displays in game. This object must have 2 TextureRect as children named Frontface and Backface. It will warn you if configured incorrectly.
Add a CardPileUI node to your game scene and configure its settings.
Begin building your game with the provided methods and signals.

Concepts

Card Pile UI - this is the manager for all cards in a collection.

Card UI Data - this represents any custom data that your cards use.

Card UI - this is the in-game representation of your card data, this holds and displays Card UI Data

Card Dropzone - this is a designated space where if a player drops a card something occurs. It can also stack cards, removing them from the standard draw/hand/discard piles.

Draw Pile - this is a pile containing cards that a player draws from during the game.

Hand Pile - this is a pile containing cards currently held by a player.

Discard Pile - this is a pile containing cards that have been discarded during the game.

Card Removal from Game, this occurs when a card is permanently removed from play

Documentation

CardPileUI Properties

Type	Name	Default	Description
Top Level	-	-	-
String	json_card_database_path	null	Specifies the file path for the JSON database containing card information
String	json_card_collection_path	null	Defines the file path for the JSON file containing the card collection
PackedScene	extended_card_ui	null	A PackedScene for your extended `CardUI` scene.
Pile Positions	-	-	-
Vector2	draw_pile_position	Vector2(20, 460)	Determines the position of the draw pile on the game screen.
Vector2	hand_pile_position	Vector2(630, 460)	Determines the position of the hand pile on the game screen.
Vector2	discard_pile_position	Vector2(1250, 460)	Determines the position of the discard pile on the game screen.
Pile displays	-	-	-
int	stack_display_gap	8	Sets the gap between displayed cards in a stack.
int	max_stack_display	6	Defines the maximum number of cards displayed in a stack.
Cards	-	-	-
float	card_speed	0.1	Sets the speed at which cards move within the game.
Draw Pile	-	-	-
bool	click_draw_pile_to_draw	true	Clicking the draw pile will trigger the `draw` method
bool	cant_draw_at_hand_limit	true	If hand is at max capacity, then the `draw` method is ignored. Otherwise cards that are drawn are immediately discarded
bool	shuffle_discard_on_empty_draw	true	Enables automatic shuffling of the discard pile into the draw pile when the draw pile is empty.
CardPileUI.PilesCardLayouts	draw_pile_layout	CardPileUI.PilesCardLayouts.up	Determines which direction the pile stacks
Hand Pile	-	-	-
bool	hand_enabled	true	Enables or disables the hand pile functionality.
bool	hand_face_up	true	Determines whether cards in the hand pile are face up or face down.
int	max_hand_size	10	Sets the maximum size of the hand. If exceeded, additional cards are immediately discarded.
int	max_hand_spread	700	Specifies the maximum spread distance of cards in the hand.
int	card_ui_hover_distance	30	Defines the distance at which the card UI responds to hover actions.
Curve	hand_rotation_curve	null	A curve for hand rotation. This works best as a 2-point line, rising linearly from -Y to +Y.
Curve	hand_vertical_curve	null	A curve for vertical hand movement. This works best as a 3-point line, easing in/out from 0 to Y to 0
Discard Pile	-	-	-
bool	discard_face_up	true	Determines whether cards in the discard pile are face up or face down.
CardPileUI.PilesCardLayouts	discard_pile_layout	CardPileUI.PilesCardLayouts.up	Determines which direction the pile stacks

CardPileUI Methods

Return	Name	Description
void	create_card_in_dropzone(nice_name : String, dropzone : CardDropzone)	Creates a new instance of the named card in the given dropzone
void	create_card_in_pile(nice_name : String, pile_to_add_to : Piles)	Creates a new instance of the named card in the given pile
void	discard_at(index : int)	Perform a typical "discard" action, moving card from the hand to the discard pile
void	draw(amount : int = 1)	Perform a typical "draw" action, moving cards from the draw pile to the hand
bool	hand_is_at_max_capacity()	Checks if hand is at max_capacity (any more cards added to it will be discarded)
CardDropzone	get_card_dropzone(card : CardUI )	Returns the current dropzone of a given card
CardUI	get_card_in_pile_at(pile : Piles, index : int)	Returns a piles card at a given index
Array[CardUI]	get_cards_in_pile(pile : Piles)	Returns an array of cards from the specified pile
int	get_card_pile_size(pile : Piles)	Returns the number of cards in a given pile
void	remove_card_from_game(card : CardUI)	Removes the specified card from the game
void	reset()	Resets all cards to the collection's initial state
void	set_card_dropzone(card : CardUI, dropzone : CardDropzone)	Moves the specified card to the designated CardDropzone
void	set_card_pile(card : CardUI, pile : Piles)	Moves the specified card to the designated pile
void	sort_hand(sort_func : Callable)	Sort the hand using a custom function

CardPileUI Signals

Signal	Description
draw_pile_updated	Indicates that the draw pile has been updated
hand_pile_updated	Indicates that the hand pile has been updated
discard_pile_updated	Indicates that the discard pile has been updated
card_removed_from_dropzone(dropzone : CardDropzone, card: CardUI)	Signals the removal of a card from the specified CardDropzone
card_added_to_dropzone(dropzone : CardDropzone, card: CardUI)	Signals the addition of a card to the specified CardDropzone
card_hovered(card: CardUI)	Indicates when a card is being hovered over
card_unhovered(card: CardUI)	Indicates when a card is no longer being hovered over
card_clicked(card: CardUI)	Signals a click event on a card
card_dropped(card: CardUI)	Signals when a clicked card has been dropped
card_removed_from_game(card: CardUI)	Signals the removal of a card from the overall game

CardDropzone Properties

Type	Name	Default	Description
CardPileUI	card_pile_ui	null	Path to the dropzone's managing CardPileUI node
bool	card_ui_face_up	true	Indicates if piled cards should be face up
int	stack_display_gap	8	Sets the gap between displayed cards in a stack.
int	max_stack_display	6	Defines the maximum number of cards displayed in a stack.
CardPileUI.PilesCardLayouts	discard_pile_layout	CardPileUI.PilesCardLayouts.up	Determines which direction the pile stacks

CardDropzone Methods

Return	Name	Description
bool	can_drop_card(card_ui : CardUI)	This determines if a card can be dropped on this dropzone. Note - this is only automatically checked when dropping a card, not programatically moving one.
void	card_ui_dropped(card_ui : CardUI)	This triggers when a card has been added or dropped on this dropzone.
CardUI	get_card_at(index : int)	Returns the card at index
Array[CardUI]	get_held_cards()	Returns an array of all held cards
CardUI	get_top_card()	Returns the top card, which is the same thing as the last one in the array
int	get_total_held_cards()	Returns the total number of cards piled here
bool	is_holding(card : CardUI)	Returns true if this card is piled here

Card Database JSON

The Card Database serves as the foundation for all card data in your game.

Minimally viable card database:

[
  {
	"nice_name": "My Card",
	"texture_path": "res://path/to/card_front.png",
	"backface_texture_path": "res://path/to/card_back.png",
	"resource_script_path": "res://path/to/card_data.gd"
  }
]

Name	Description
nice_name	A unique name for this card
texture_path	Filepath to the card's front texture
backface_texture_path	Filepath to the card's back texture
resource_script_path	Filepath to the card's resource script. If you don't need any custom functionality, you can point this to `res://addons/simple_card_pile_ui/card_ui_data.gd`
*	You can add more data as needed

Card Collection JSON

This represents the cards that begin in the draw pile.

Example:

 [ "My Card", "My Card", "My Other Card", "My Other Card" ]

To Do List

Add support for multiple hands to use the same card pile
Add more shuffle methods
Add more sort methods
Document new properties/methods into the read me
Add different icons for dropzones/debugger
Add different layout options for dropzones

Thanks to

Changelog

1.1.0 (2024-02-02)

Updates CardUI to work better

1.0.1 (2024-02-01)

Removes lerp when clicking a card
Fixes dropzone top card hover triggering when a card is clicked
Adds layout directions to piles and dropzones

1.0.0 (2024-01-31)

Initial release

Simple Card Pile UI 2D