Class Point2

Defined in: lina.js.

Class Summary
Constructor Attributes	Constructor Name and Description
	Point2(x, y) Point in 2D space that has an internal cartesian representation (x/y) and support for transformations.

Method Summary
Method Attributes	Method Name and Description
	copy() Return a new copy of this point.
	distanceTo(pt2, y) Return distance from this to pt2.
<static>	Point2.distanceTo(pt1, pt2, y) Return distance from this to pt2.
<static>	Point2.isEqual(pt1, pt2, eps) Check if pt2 is (aproximately) equal to pt1.
	isEqual(pt2, eps) Check if pt2 is (aproximately) equal to this.
	mdistance(pt2) Return Manhattan-Distance from this to pt2.
<static>	Point2.rotate(pt, a, ptCenter) Return rotated copy of pt.
	rotate(a, ptCenter) Rotate this point (in-place) and return this instance.
	set(x, y) Set coordinates.
	sqrDistanceTo(pt2, y) Return squared distance from this to pt2.
	toString(prec) Return string representation '(x/y)'.
<static>	Point2.transform(pt, m) Return a copy of pt transformed by m.
	transform(m) Apply transformation matrix (in-place) and return this instance.
	translate(vecOrDx, dy) Translate point (in-place) and return this instance.
<static>	Point2.translate(pt, dx, dy) Return a translated copy of pt.
	vectorTo(pt2, y) Return vector from this to pt2.
<static>	Point2.vectorTo(pt1, pt2, y) Return vector from pt1 to pt2.

Class Detail

Point2(x, y)

Point in 2D space that has an internal cartesian representation (x/y) and support for transformations. When applying transformations, a point is handled as [x, y, 1].

  var pt1 = new Point2(3, 4);
  pt1.rotate(Math.PI).translate(1, 2);
  var pt2 = new Point2({x:2, y:1});
  var dist = pt1.distanceTo(pt2)

Parameters:
{float|Point2|JS-object} x: X-coordinate or a Point2 instance or {x:_, y:_}
{float} y: Y-coordinate or undefined, if x is a Point2 instance or {x:_, y:_}

Method Detail

{Point2} copy()

Return a new copy of this point.

Returns:: {Point2}

{float} distanceTo(pt2, y)

Return distance from this to pt2. .

Parameters:
{Point2|JS-Object} pt2: Second point.
y

Returns:: {float}

<static> {float} Point2.distanceTo(pt1, pt2, y)

Return distance from this to pt2.

Parameters:
{Point2|JS-Object} pt1: First point.
{Point2|JS-Object} pt2: Second point.
y

Returns:: {float}

<static> {boolean} Point2.isEqual(pt1, pt2, eps)

Check if pt2 is (aproximately) equal to pt1.

Parameters:
{Point2|JS-Object} pt1: First point.
{Point2|JS-Object} pt2: Second point.
{float} eps: (optional) accepted maximum distance.

Returns:: {boolean}

{boolean} isEqual(pt2, eps)

Check if pt2 is (aproximately) equal to this.

Parameters:
{Point2|JS-Object} pt2: Second point.
{float} eps: (optional) accepted maximum distance.

Returns:: {boolean}

{float} mdistance(pt2)

Return Manhattan-Distance from this to pt2.

Parameters:
{Point2} pt2: (optional) Second point.

Returns:: {float}

<static> {Point2} Point2.rotate(pt, a, ptCenter)

Return rotated copy of pt.

Parameters:
{Point2} pt: point that will be rotaded.
{float} a: Angle in radians.
{Point2} ptCenter: (optional) center of rotation, defaults to (0/0).

Returns:: {Point2}

{Point2} rotate(a, ptCenter)

Rotate this point (in-place) and return this instance.

Parameters:
{float} a: Angle in radians.
{Point2} ptCenter: (optional) center of rotation, defaults to (0/0).

Returns:: {Point2}

{Point2} set(x, y)

Set coordinates.

Parameters:
{float|Point2|JS-object} x: X-coordinate or a Point2 instance or {x:_, y:_}
{float} y: Y-coordinate or undefined, if x is a Point2 instance or {x:_, y:_}

Returns:: {Point2}

{float} sqrDistanceTo(pt2, y)

Return squared distance from this to pt2. .

Parameters:
{Point2|JS-Object} pt2: Second point.
y

Returns:: {float}

toString(prec)

Return string representation '(x/y)'.

Parameters:
prec

<static> {Point2} Point2.transform(pt, m)

Return a copy of pt transformed by m.

Parameters:
{Point2} pt: point that will be transformed.
{Matrix3} m: tranformation matrix.

Returns:: {Point2}

{Point2} transform(m)

Apply transformation matrix (in-place) and return this instance.

Parameters:
m

Returns:: {Point2}

{Point2} translate(vecOrDx, dy)

Translate point (in-place) and return this instance.

Parameters:
{float|Vec2} vecOrDx: x-offset or offset vector
{float|undefined} dy: y-offset (omit this parameter, if x is a Vec2)

Returns:: {Point2}

<static> {Point2} Point2.translate(pt, dx, dy)

Return a translated copy of pt.

Parameters:
{Point2} pt: point that will be translated.
{float|Vec2} dx: x-offset or offset vector
{float|undefined} dy: y-offset (omit this parameter, if x is a Vec2)

Returns:: {Point2}

{Vec2} vectorTo(pt2, y)

Return vector from this to pt2.

Parameters:
{Point2|JS-Object} pt2: Second point.
y

Returns:: {Vec2}

<static> {float} Point2.vectorTo(pt1, pt2, y)

Return vector from pt1 to pt2.

Parameters:
{Point2|JS-Object} pt1: First point.
{Point2|JS-Object} pt2: Second point.
y

Returns:: {float}

Classes

Class Point2