import {HalfEdge} from 'blueprint3d-js/scripts/model/half_edge.js'

public class | source

HalfEdge

Extends:

three~EventDispatcher → HalfEdge

Half Edges are created by Room.

Once rooms have been identified, Half Edges are created for each interior wall.

A wall can have two half edges if it is visible from both sides.

Constructor Summary

Public Constructor
public	constructor(room: Room, wall: Wall, front: boolean) Constructs a half edge.

Member Summary

Public Members
public	center: Vector3 The center of this half edge
public	exteriorTransform: Matrix4 The exterior transformation matrix that contains the homogeneous transformation of the plane based on the two corner positions of the wall
public	front: boolean Is this is the front edge or the back edge
public	height: Number The height of a wall
public	interiorTransform: Matrix4 The interior transformation matrix that contains the homogeneous transformation of the plane based on the two corner positions of the wall
public	invExteriorTransform: Matrix4 The inverse of the exterior transformation matrix that contains the homogeneous transformation of the plane based on the two corner positions of the wall
public	invInteriorTransform: Matrix4 The inverse of the interior transformation matrix that contains the homogeneous transformation of the plane based on the two corner positions of the wall
public	max: Vector3 The maximum point in space calculated from the bounds
public	min: Vector3 The minimum point in space calculated from the bounds
public	next: HalfEdge Reference to the next halfedge instance connected to this
public	offset: Number The offset to maintain for the front and back walls from the midline of a wall
public	plane: Mesh The plane mesh that will be used for checking intersections of wall items
public	prev: HalfEdge Reference to the previous halfedge instance connected to this
public	redrawCallbacks: * This is an array of callbacks to be call when redraw happens
public	room: Room Reference to a Room instance
public	wall: Wall Reference to a Wall instance

Method Summary

Public Methods
public	computeTransforms(transform: Matrix4, invTransform: Matrix4, start: Vector2, end: Vector2) Calculate the transformation matrix for the edge (front/back) baesd on the parameters.
public	corners(): Corner[] Get the corners of the half edge.
public	dispatchRedrawEvent() Emit the redraw event
public	distanceTo(x: Number, y: Number): Number Gets the distance from specified point.
public	exteriorCenter(): Vector2 Return the 2D exterior location that is at the center/middle.
public	exteriorDistance(): Number Return the exterior distance of the exterior wall
public	exteriorEnd(): Vector2 Return the 2D exterior location that is at the end.
public	exteriorStart(): Vector2 Return the 2D exterior location that is at the start.
public	generatePlane() This generates the invisible planes in the scene that are used for interesection testing for the wall items
public	getEnd(): Corner Get the ending corner of the wall this instance represents
public	getOppositeEdge(): HalfEdge If this is the front edge then return the back edge.
public	getStart(): Corner Get the starting corner of the wall this instance represents
public	getTexture(): Object Two separate textures are used for the walls.
public	halfAngleVector(v1: Vector2, v1: Vector2): Object Gets CCW angle from v1 to v2
public	interiorCenter(): Vector2 Return the 2D interior location that is at the center/middle.
public	interiorDistance(): Number Return the interior distance of the interior wall
public	interiorEnd(): Vector2 Return the 2D interior location that is at the end.
public	interiorStart(): Vector2 Return the 2D interior location that is at the start.
public	setTexture(textureUrl: String, textureStretch: boolean, textureScale: Number) Set a Texture to the wall.
public	transformCorner(corner: Corner): Vector3 Transform the Corner instance to a Vector3 instance using the x and y position returned as x and z

Public Constructors

public constructor(room: Room, wall: Wall, front: boolean) source

Constructs a half edge.

Params:

Name	Type	Attribute	Description
room	Room		The associated room. Instance of Room
wall	Wall		The corresponding wall. Instance of Wall
front	boolean		True if front side. Boolean value

Public Members

public center: Vector3 source

The center of this half edge

Properties:

Name	Type	Attribute	Description
center	Vector3		The center of this half edge

See:

https://threejs.org/docs/#api/en/math/Vector3

public exteriorTransform: Matrix4 source

The exterior transformation matrix that contains the homogeneous transformation of the plane based on the two corner positions of the wall

Properties:

Name	Type	Attribute	Description
exteriorTransform	Matrix4		The exterior transformation matrix that contains the homogeneous transformation of the plane based on the two corner positions of the wall

See:

https://threejs.org/docs/#api/en/math/Matrix4

public front: boolean source

Is this is the front edge or the back edge

Properties:

Name	Type	Attribute	Description
front	boolean		Is this is the front edge or the back edge

public height: Number source

The height of a wall

Properties:

Name	Type	Attribute	Description
height	Number		The height of a wall

public interiorTransform: Matrix4 source

The interior transformation matrix that contains the homogeneous transformation of the plane based on the two corner positions of the wall

Properties:

Name	Type	Attribute	Description
interiorTransform	Matrix4		The interior transformation matrix that contains the homogeneous transformation of the plane based on the two corner positions of the wall

See:

https://threejs.org/docs/#api/en/math/Matrix4

public invExteriorTransform: Matrix4 source

The inverse of the exterior transformation matrix that contains the homogeneous transformation of the plane based on the two corner positions of the wall

Properties:

Name	Type	Attribute	Description
invExteriorTransform	Matrix4		The inverse of the exterior transformation matrix that contains the homogeneous transformation of the plane based on the two corner positions of the wall

See:

https://threejs.org/docs/#api/en/math/Matrix4

public invInteriorTransform: Matrix4 source

The inverse of the interior transformation matrix that contains the homogeneous transformation of the plane based on the two corner positions of the wall

Properties:

Name	Type	Attribute	Description
invInteriorTransform	Matrix4		The inverse of the interior transformation matrix that contains the homogeneous transformation of the plane based on the two corner positions of the wall

See:

https://threejs.org/docs/#api/en/math/Matrix4

public max: Vector3 source

The maximum point in space calculated from the bounds

Properties:

Name	Type	Attribute	Description
max	Vector3		The maximum point in space calculated from the bounds

See:

https://threejs.org/docs/#api/en/math/Vector3

public min: Vector3 source

The minimum point in space calculated from the bounds

Properties:

Name	Type	Attribute	Description
min	Vector3		The minimum point in space calculated from the bounds

See:

https://threejs.org/docs/#api/en/math/Vector3

public next: HalfEdge source

Reference to the next halfedge instance connected to this

Properties:

Name	Type	Attribute	Description
next	HalfEdge		Reference to the next halfedge instance connected to this

public offset: Number source

The offset to maintain for the front and back walls from the midline of a wall

Properties:

Name	Type	Attribute	Description
offset	Number		The offset to maintain for the front and back walls from the midline of a wall

public plane: Mesh source

The plane mesh that will be used for checking intersections of wall items

Properties:

Name	Type	Attribute	Description
plane	Mesh		The plane mesh that will be used for checking intersections of wall items

See:

https://threejs.org/docs/#api/en/objects/Mesh

public prev: HalfEdge source

Reference to the previous halfedge instance connected to this

Properties:

Name	Type	Attribute	Description
prev	HalfEdge		Reference to the previous halfedge instance connected to this

public redrawCallbacks: * source

This is an array of callbacks to be call when redraw happens

public room: Room source

Reference to a Room instance

Properties:

Name	Type	Attribute	Description
room	Room		Reference to a Room instance

public wall: Wall source

Reference to a Wall instance

Properties:

Name	Type	Attribute	Description
room	Wall		Reference to a Wall instance

Public Methods

public computeTransforms(transform: Matrix4, invTransform: Matrix4, start: Vector2, end: Vector2) source

Calculate the transformation matrix for the edge (front/back) baesd on the parameters.

Params:

Name	Type	Attribute	Description
transform	Matrix4		The matrix reference in which the transformation is stored
invTransform	Matrix4		The inverse of the transform that is stored in the invTransform
start	Vector2		The starting point location
end	Vector2		The ending point location

See:

public corners(): Corner[] source

Get the corners of the half edge.

Return:

Corner[]

An array of x,y pairs.

public dispatchRedrawEvent() source

Emit the redraw event

Emit:

EVENT_REDRAW

public distanceTo(x: Number, y: Number): Number source

Gets the distance from specified point.

Params:

Name	Type	Attribute	Description
x	Number		X coordinate of the point.
y	Number		Y coordinate of the point.

Return:

Number

The distance.

public exteriorCenter(): Vector2 source

Return the 2D exterior location that is at the center/middle.

Return:

Vector2

Return an object with attributes x, y

See:

https://threejs.org/docs/#api/en/math/Vector2

public exteriorDistance(): Number source

Return the exterior distance of the exterior wall

Return:

Number

The distance

public exteriorEnd(): Vector2 source

Return the 2D exterior location that is at the end.

Return:

Vector2

Return an object with attributes x, y

See:

https://threejs.org/docs/#api/en/math/Vector2

public exteriorStart(): Vector2 source

Return the 2D exterior location that is at the start.

Return:

Vector2

Return an object with attributes x, y

See:

https://threejs.org/docs/#api/en/math/Vector2

public generatePlane() source

This generates the invisible planes in the scene that are used for interesection testing for the wall items

public getEnd(): Corner source

Get the ending corner of the wall this instance represents

Return:

Corner

The ending corner

public getOppositeEdge(): HalfEdge source

If this is the front edge then return the back edge. For example in a wall there are two halfedges, i.e one for front and one back. Based on which side this halfedge lies return the opposite HalfEdge

Return:

HalfEdge

The other HalfEdge

public getStart(): Corner source

Get the starting corner of the wall this instance represents

Return:

Corner

The starting corner

public getTexture(): Object source

Two separate textures are used for the walls. Based on which side of the wall this {HalfEdge} refers the texture is returned

Return:

Object

front/back Two separate textures are used for the walls. Based on which side of the wall this HalfEdge refers the texture is returned

public halfAngleVector(v1: Vector2, v1: Vector2): Object source

Gets CCW angle from v1 to v2

Params:

Name	Type	Attribute	Description
v1	Vector2		The point a
v1	Vector2		The point b

Return:

Object

contains keys x and y with number representing the halfAngles

public interiorCenter(): Vector2 source

Return the 2D interior location that is at the center/middle.

Return:

Vector2

Return an object with attributes x, y

See:

https://threejs.org/docs/#api/en/math/Vector2

public interiorDistance(): Number source

Return the interior distance of the interior wall

Return:

Number

The distance

public interiorEnd(): Vector2 source

Return the 2D interior location that is at the end.

Return:

Vector2

Return an object with attributes x, y

See:

https://threejs.org/docs/#api/en/math/Vector2

public interiorStart(): Vector2 source

Return the 2D interior location that is at the start.

Return:

Vector2

Return an object with attributes x, y

See:

https://threejs.org/docs/#api/en/math/Vector2

public setTexture(textureUrl: String, textureStretch: boolean, textureScale: Number) source

Set a Texture to the wall. Based on the edge side as front or back the texture is applied appropriately to the wall

Params:

Name	Type	Attribute	Description
textureUrl	String		The path to the texture image
textureStretch	boolean		Can the texture stretch? If not it will be repeated
textureScale	Number		The scale value using which the number of repetitions of the texture image is calculated

Emit:

EVENT_REDRAW

public transformCorner(corner: Corner): Vector3 source

Transform the Corner instance to a Vector3 instance using the x and y position returned as x and z

Params:

Name	Type	Attribute	Description
corner	Corner

Return:

Vector3

See:

https://threejs.org/docs/#api/en/math/Vector3