JavaScript DOMPoint : DOMPointReadOnly

constructor

Represents a 3D point using homogeneous coordinates.

Spec

Constructors

new DOMPoint([x = 0 : Number, [y = 0 : Number, [z = 0 : Number, [w = 1 : Number]]]]) : DOMPoint

Example:

<script>
  const point = new DOMPoint();
  console.log(point.x, point.y, point.z, point.w);

  const point2 = new DOMPoint(4, 5, 6);
  console.log(point2.x, point2.y, point2.z, point2.w);

  const point3 = new DOMPoint(7, 8, 9, 10);
  console.log(point3.x, point3.y, point3.z, point3.w);
</script>

Run

Results:

Instance Properties

w : Number

The w coordinate of the point. Typically set to 1. See homogeneous coordinates for more details.

Example:

<script>
  const point = new DOMPointReadOnly();
  console.log(point.w);

  const point2 = new DOMPointReadOnly(4, 5, 6);
  console.log(point2.w);

  const point3 = new DOMPointReadOnly(7, 8, 9, 10);
  console.log(point3.w);
</script>

Run

Results:

x : Number

The x coordinate of the point.

Example:

<script>
  const point = new DOMPointReadOnly();
  console.log(point.x);

  const point2 = new DOMPointReadOnly(4, 5, 6);
  console.log(point2.x);

  const point3 = new DOMPointReadOnly(7, 8, 9, 10);
  console.log(point3.x);
</script>

Run

Results:

y : Number

The y coordinate of the point.

Example:

<script>
  const point = new DOMPointReadOnly();
  console.log(point.y);

  const point2 = new DOMPointReadOnly(4, 5, 6);
  console.log(point2.y);

  const point3 = new DOMPointReadOnly(7, 8, 9, 10);
  console.log(point3.y);
</script>

Run

Results:

z : Number

The z coordinate of the point.

Example:

<script>
  const point = new DOMPointReadOnly();
  console.log(point.z);

  const point2 = new DOMPointReadOnly(4, 5, 6);
  console.log(point2.z);

  const point3 = new DOMPointReadOnly(7, 8, 9, 10);
  console.log(point3.z);
</script>

Run

Results:

DOMPoint Methods

fromPoint 2 variants

fromPoint(point : Object) : DOMPoint

point : {

x	Number	Default = `0`
y	Number	Default = `0`
z	Number	Default = `0`
w	Number	Default = `1`

}

Returns a new DOMPoint that copies the coordinates from point.

Example:

<script>
  // The following are equivalent
  const point = new DOMPointReadOnly(4, 5, 6);
  console.log(point.x, point.y, point.z, point.w);

  const point2 = DOMPointReadOnly.fromPoint({ x: 4, y: 5, z: 6});
  console.log(point2.x, point2.y, point2.z, point2.w);
</script>

Run

Results:

fromPoint(point : DOMPointReadOnly) : DOMPoint

Returns a new DOMPoint that copies the coordinates from point.

Example:

<script>
  const point = new DOMPointReadOnly(4, 5, 6);
  console.log(point.x, point.y, point.z, point.w);

  const point2 = DOMPoint.fromPoint(point);
  console.log(point2.x, point2.y, point2.z, point2.w);

  const point3 = new DOMPoint(7, 8, 9, 10);
  console.log(point3.x, point3.y, point3.z, point3.w);

  const point4 = DOMPoint.fromPoint(point3);
  console.log(point4.x, point4.y, point4.z, point4.w);
</script>

Run

Results:

home license contribute feedback