Class pv.Vector

Represents a two-dimensional vector; a 2-tuple ⟨x, y⟩.

Defined in: Vector.js.

Class Summary
Constructor Attributes	Constructor Name and Description
	pv.Vector(x, y) Constructs a pv.Vector for the specified x and y coordinate.

Method Summary
Method Attributes	Method Name and Description
	dot(x, y) Returns the dot product of this vector and the vector v: x v.x + y * v.y*.
	length() Returns the magnitude of this vector, defined as sqrt(x x + y * y)*.
	minus(x, y) Returns this vector minus the vector v: ⟨x - v.x, y - v.y⟩.
	norm() Returns a normalized copy of this vector: a vector with the same direction, but unit length.
	perp() Returns a vector perpendicular to this vector: ⟨-y, x⟩.
	plus(x, y) Returns this vector plus the vector v: ⟨x + v.x, y + v.y⟩.
	times(k) Returns a scaled copy of this vector: ⟨x k, y * k⟩*.

Class Detail

pv.Vector(x, y)

Constructs a pv.Vector for the specified x and y coordinate. This constructor should not be invoked directly; use pv.vector instead.

Parameters:
{number} x: the x coordinate.
{number} y: the y coordinate.

Method Detail

{number} dot(x, y)

Returns the dot product of this vector and the vector v: x * v.x + y * v.y. If only one argument is specified, it is interpreted as the vector v.

Parameters:
{number} x: the x coordinate to dot.
{number} y: the y coordinate to dot.

Returns:: {number} a dot product.

{number} length()

Returns the magnitude of this vector, defined as sqrt(x * x + y * y).

Returns:: {number} a length.

{pv.Vector} minus(x, y)

Returns this vector minus the vector v: ⟨x - v.x, y - v.y⟩. If only one argument is specified, it is interpreted as the vector v.

Parameters:
{number} x: the x coordinate to subtract.
{number} y: the y coordinate to subtract.

Returns:: {pv.Vector} a new vector.

{pv.Vector} norm()

Returns a normalized copy of this vector: a vector with the same direction, but unit length. If this vector has zero length this method returns a copy of this vector.

Returns:: {pv.Vector} a unit vector.

{pv.Vector} perp()

Returns a vector perpendicular to this vector: ⟨-y, x⟩.

Returns:: {pv.Vector} a perpendicular vector.

{pv.Vector} plus(x, y)

Returns this vector plus the vector v: ⟨x + v.x, y + v.y⟩. If only one argument is specified, it is interpreted as the vector v.

Parameters:
{number} x: the x coordinate to add.
{number} y: the y coordinate to add.

Returns:: {pv.Vector} a new vector.

{pv.Vector} times(k)

Returns a scaled copy of this vector: ⟨x * k, y * k⟩. To perform the equivalent divide operation, use 1 / k.

Parameters:
{number} k: the scale factor.

Returns:: {pv.Vector} a scaled vector.

Classes

Class pv.Vector