Vector

Vector

Class representing a vector

Constructor

new Vector(ps, pe)

Vector may be constructed by two points, or by two float numbers, or by array of two numbers
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Parameters:
Name Type Description
ps Point start point
pe Point end point

Classes

Vector

Members

length

Length of vector
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slope

Slope of the vector in radians from 0 to 2PI
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x :number

x-coordinate of a vector (float number)
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Type:
  • number

y :number

y-coordinate of a vector (float number)
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Type:
  • number

Methods

add(v) → {Vector}

Return result of addition of other vector to this vector as a new vector
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Parameters:
Name Type Description
v Vector Other vector
Returns:
Type:
Vector

angleTo(v) → {number}

Return angle between this vector and other vector.
Angle is measured from 0 to 2*PI in the counterclockwise direction from current vector to another.
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Parameters:
Name Type Description
v Vector Another vector
Returns:
Type:
number

clone() → {Vector}

Method clone returns new instance of Vector
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Returns:
Type:
Vector

cross(v) → {number}

Returns vector product (cross product) of two vectors
cross_product = (this x v)
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Parameters:
Name Type Description
v Vector Other vector
Returns:
Type:
number

dot(v) → {number}

Returns scalar product (dot product) of two vectors
dot_product = (this * v)
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Parameters:
Name Type Description
v Vector Other vector
Returns:
Type:
number

equalTo(v) → {boolean}

Returns true if vectors are equal up to DP_TOL tolerance
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Parameters:
Name Type Description
v Vector
Returns:
Type:
boolean

invert() → {Vector}

Return inverted vector
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Returns:
Type:
Vector

multiply(scalar) → {Vector}

Returns new vector multiplied by scalar
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Parameters:
Name Type Description
scalar number
Returns:
Type:
Vector

normalize() → {Vector}

Returns unit vector.
Throw error if given vector has zero length
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Returns:
Type:
Vector

projectionOn(v) → {Vector}

Return vector projection of the current vector on another vector
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Parameters:
Name Type Description
v Vector Another vector
Returns:
Type:
Vector

rotate(angle) → {Vector}

Returns new vector rotated by given angle, positive angle defines rotation in counterclockwise direction, negative - in clockwise direction Vector only can be rotated around (0,0) point!
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Parameters:
Name Type Description
angle number Angle in radians
Returns:
Type:
Vector

rotate90CCW() → {Vector}

Returns vector rotated 90 degrees counterclockwise
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Returns:
Type:
Vector

rotate90CW() → {Vector}

Returns vector rotated 90 degrees clockwise
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Returns:
Type:
Vector

subtract(v) → {Vector}

Return result of subtraction of other vector from current vector as a new vector
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Parameters:
Name Type Description
v Vector Another vector
Returns:
Type:
Vector

transform(m) → {Vector}

Return new vector transformed by affine transformation matrix m
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Parameters:
Name Type Description
m Matrix affine transformation matrix (a,b,c,d,tx,ty)
Returns:
Type:
Vector