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Object Stack

An ordered list of objects and a shuffle action.

Authors and contributors to this experimental extension: D8H.

This keep in memory a stack of object instances, with:

  • Actions to modify the stack,
  • Conditions to access the objects of a stack,
  • A shuffle action.

It can be helpful for:

  • Card games
  • Fair randomness (for instance, to create a stack of predetermined bonus and randomize the order they appear)

3 examples use it:

Tip

Learn how to install new extensions by following a step-by-step guide.

Conditions

Contain
Check if the stack contains the object.

See parameters
  • Parameter 1 (👾 Object): Stack
  • Parameter 2 (🧩 Behavior): Stack behavior
  • Parameter 3 (👾 Object): Element

Technical note: parameters 0, 4 are internal parameters handled by GDevelop.

Contain at
Check if the stack contains the object at a height.

See parameters
  • Parameter 1 (👾 Object): Stack
  • Parameter 2 (🧩 Behavior): Stack behavior
  • Parameter 3 (👾 Object): Element
  • Parameter 4 (🔢 Number): Height

Technical note: parameters 0, 5 are internal parameters handled by GDevelop.

Contain between a range
Check if the stack contains the object between a range. The lower and upper bounds are included.

See parameters
  • Parameter 1 (👾 Object): Stack
  • Parameter 2 (🧩 Behavior): Stack behavior
  • Parameter 3 (👾 Object): Element
  • Parameter 4 (🔢 Number): Lower bound
  • Parameter 5 (🔢 Number): Upper bound

Technical note: parameters 0, 6 are internal parameters handled by GDevelop.

Stack top
Check if an object is on the stack top.

See parameters
  • Parameter 1 (👾 Object): Stack
  • Parameter 2 (🧩 Behavior): Stack behavior
  • Parameter 3 (👾 Object): Element

Technical note: parameters 0, 4 are internal parameters handled by GDevelop.

Object Stack

Hold an ordered list of objects.

Behavior actions

Add on top
Add the object on the top of the stack.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 👾 Object

Technical note: parameter 3 are internal parameters handled by GDevelop.

Clear
Remove any object from the stack.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior

Technical note: parameter 2 are internal parameters handled by GDevelop.

Insert into the stack
Insert the object into the stack.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 👾 Object
  • Parameter 3 (🔢 Number): Height

Technical note: parameter 4 are internal parameters handled by GDevelop.

Move all into the stack
Move all the object from a stack into another.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2 (🔢 Number): Height
  • Parameter 3 (👾 Object): Stack
  • Parameter 4 (🧩 Behavior): Stack behavior

Technical note: parameter 5 are internal parameters handled by GDevelop.

Move all on top of the stack
Move all the object from a stack into another one at the top.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2 (👾 Object): Stack
  • Parameter 3 (🧩 Behavior): Stack behavior

Technical note: parameter 4 are internal parameters handled by GDevelop.

Move into the stack
Move the objects from a stack into another.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2 (🔢 Number): Height
  • Parameter 3 (👾 Object): Stack
  • Parameter 4 (🧩 Behavior): Stack behavior
  • Parameter 5 (🔢 Number): Lower bound
  • Parameter 6 (🔢 Number): Upper bound

Technical note: parameter 7 are internal parameters handled by GDevelop.

Remove from the stack
Remove the object from the stack.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 👾 Object

Technical note: parameter 3 are internal parameters handled by GDevelop.

Shuffle
Shuffle the stack.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior

Technical note: parameter 2 are internal parameters handled by GDevelop.

Behavior conditions

Stack height
Compare the number of objects in the stack.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Relational operator
  • Parameter 3 (🔢 Number): Value to compare

Technical note: parameter 4 are internal parameters handled by GDevelop.

Is empty
Check if the stack is empty.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior

Technical note: parameter 2 are internal parameters handled by GDevelop.

Behavior expressions

Expression Description
Object.ObjectStack::Height() Return the number of objects in the stack.
Object.ObjectStack::HeightOf(object) The height of an element in the stack.
👾 Object Object

This page is an auto-generated reference page about the Object Stack extension, made by the community of GDevelop, the open-source, cross-platform game engine designed for everyone. Learn more about all GDevelop community-made extensions here.