Libraries.Game.Collision.DynamicBoundingVolumeTreeNode2D Documentation

The DynamicBoundingVolumeTreeNode2D represents a node in the DynamicBoundingVolumeTree2D class. A DynamicBoundingVolumeTreeNode2D represents a BoundingBox2D which represents an item in the game. This node stores its parent in the tree as well as any children of the node. Additionally, the node's height in the tree and ID in integer are stored. By default, the node's treeParent, itemNode, leftChild, and rightChild are undefined. The node id and height are, by default, -1. This class is used internally by DynamicBoundingVolumeTree2D.

Example Code

use Libraries.Game.Collision.DynamicBoundingVolumeTreeNode2D
use Libraries.Game.Collision.BoundingBox2D
use Libraries.Compute.Vector2
use Libraries.Game.Collision.Item2DNode

DynamicBoundingVolumeTreeNode2D newNode
Item2DNode node
BoundingBox2D boundingBox
Vector2 boxMinimum
Vector2 boxMaximum
boxMinimum:Set(-1, -1)
boxMaximum:Set(1, 1)
newNode:SetID(0) 
BoundingBox2D nodeBoundingBox = newNode:GetBoundingBox()
Vector2 minimum
Vector2 maximum
minimum:Set(boundingBox:GetMinimum())
maximum:Set(boundingBox:GetMaximum())
nodeBoundingBox:Set(minimum, maximum)
newNode:SetItemNode(node)

Inherits from: Libraries.Language.Object

Actions Documentation

Compare(Libraries.Language.Object object)

This action compares two object hash codes and returns an integer. The result is larger if this hash code is larger than the object passed as a parameter, smaller, or equal. In this case, -1 means smaller, 0 means equal, and 1 means larger. This action was changed in Quorum 7 to return an integer, instead of a CompareResult object, because the previous implementation was causing efficiency issues.

Parameters

Return

integer: The Compare result, Smaller, Equal, or Larger.

Example

Object o
Object t
integer result = o:Compare(t) //1 (larger), 0 (equal), or -1 (smaller)

Equals(Libraries.Language.Object object)

This action determines if two objects are equal based on their hash code values.

Parameters

Return

boolean: True if the hash codes are equal and false if they are not equal.

Example

use Libraries.Language.Object
use Libraries.Language.Types.Text
Object o
Text t
boolean result = o:Equals(t)

GetBoundingBox()

This action returns the BoundingBox2D which this node represents. This action is used internally.

Return

Libraries.Game.Collision.BoundingBox2D: The BoundingBox2D represented by this tree node.

Example

use Libraries.Game.Collision.DynamicBoundingVolumeTreeNode2D
use Libraries.Game.Collision.BoundingBox2D

    DynamicBoundingVolumeTreeNode2D node
    BoundingBox2D boundingBox
    boundingBox = node:GetBoundingBox()

GetHashCode()

This action gets the hash code for an object.

Return

integer: The integer hash code of the object.

Example

Object o
integer hash = o:GetHashCode()

GetHeight()

This action returns the integer height of this node in the DynamicBoundingVolumeTree2D. This action is used internally.

Return

integer: The integer height of this tree node.

Example

use Libraries.Game.Collision.DynamicBoundingVolumeTreeNode2D

    DynamicBoundingVolumeTreeNode2D node
    output "Node " + node:GetID() + " is at height " + node:GetHeight()

GetID()

This action gets the id of this node. This action is used internally.

Return

integer: The id of this node.

Example

use Libraries.Game.Collision.DynamicBoundingVolumeTreeNode2D
use Libraries.Game.Collision.DynamicBoundingVolumeTree2D

    DynamicBoundingVolumeTree2D tree
    DynamicBoundingVolumeTreeNode2D newNode
    newNode:SetID(0)
    integer id = newNode:GetID()

GetItemNode()

This action returns the Item2DNode in the Dynamic Bounding Volume Tree Node (2D), which has among its data members a BoundingBox2D and an Item2D. This action is used internally.

Return

Libraries.Game.Collision.Item2DNode: The item2DNode in this tree node.

Example

use Libraries.Game.Collision.DynamicBoundingVolumeTreeNode2D
use Libraries.Game.Collision.Item2DNode

    DynamicBoundingVolumeTreeNode2D node
    Item2DNode itemNode
    itemNode = node:GetItemNode

GetLeftChild()

This action returns the DynamicBoundingVolumeTreeNode2D which is the left child of this node. This action is used internally.

Return

Libraries.Game.Collision.DynamicBoundingVolumeTreeNode2D: The DynamicBoundingVolumeTreeNode2D left child of this node.

Example

use Libraries.Game.Collision.DynamicBoundingVolumeTreeNode2D

    DynamicBoundingVolumeTreeNode2D node
    DynamicBoundingVolumeTreeNode2D leftNode
    leftNode:SetID(1)
    node:SetLeftChild(leftNode)
    output "The left child of this node is node " + node:GetLeftChild():GetID()

GetParent()

This action returns the DynamicBoundingVolumeTreeNode2D which is the parent of this node. This action is used internally.

Return

Libraries.Game.Collision.DynamicBoundingVolumeTreeNode2D: The DynamicBoundingVolumeTreeNode2D parent of this node.

Example

use Libraries.Game.Collision.DynamicBoundingVolumeTreeNode2D

    DynamicBoundingVolumeTreeNode2D node
    DynamicBoundingVolumeTreeNode2D parentNode
    parentNode:SetID(1)
    node:SetParent(parentNode)
    output "The parent of this node is node " + node:GetParent():GetID()

GetRightChild()

This action returns the DynamicBoundingVolumeTreeNode2D which is the right child of this node. This action is used internally.

Return

Libraries.Game.Collision.DynamicBoundingVolumeTreeNode2D: The DynamicBoundingVolumeTreeNode2D right child of this node.

Example

use Libraries.Game.Collision.DynamicBoundingVolumeTreeNode2D

    DynamicBoundingVolumeTreeNode2D node
    DynamicBoundingVolumeTreeNode2D rightNode
    rightNode:SetID(1)
    node:SetRightChild(rightNode)
    output "The right child of this node is node " + node:GetRightChild():GetID()

IsLeaf()

This action returns true if this node is a leaf (i.e. has no children) and false if this node has children. Attribute Returns boolean The boolean that indicates whether or not this node is a leaf

Return

boolean:

Example

use Libraries.Game.Collision.DynamicBoundingVolumeTreeNode2D

    DynamicBoundingVolumeTreeNode2D node
    DynamicBoundingVolumeTreeNode2D leftNode
    node:SetLeftChild(leftNode)
    if node:IsLeaf() 
        output "This node is a leaf."
    else
        output "This node is not a leaf."
    end

SetBoundingBox(Libraries.Game.Collision.BoundingBox2D boundingBox)

This action sets the BoundingBox2D which this node is to represent. This action is used internally.

Parameters

Example

use Libraries.Game.Collision.DynamicBoundingVolumeTreeNode2D
use Libraries.Game.Collision.BoundingBox2D

    DynamicBoundingVolumeTreeNode2D node
    BoundingBox2D boundingBox
    node:SetBoundingBox(boundingBox)

SetHeight(integer height)

This action sets the height of the Dynamic Bounding Volume Tree Node (2D) in the DynamicBoundingVolumeTree2D. This action is used internally.

Parameters

  • integer height: The integer height at which this node should be.

Example

use Libraries.Game.Collision.DynamicBoundingVolumeTreeNode2D
use Libraries.Game.Collision.Item2DNode

    DynamicBoundingVolumeTreeNode2D node
    Item2DNode itemNode
    node:SetHeight(1)

SetID(integer id)

This action sets the id of the Dynamic Bounding Volume Tree Node (2D). This action is used internally.

Parameters

  • integer id: The integer that will be the node id.

Example

use Libraries.Game.Collision.DynamicBoundingVolumeTreeNode2D

    DynamicBoundingVolumeTreeNode2D node
    node:Set(0)