EllipsoidTangentPlane

new Cesium.EllipsoidTangentPlane(origin, ellipsoid)

A plane tangent to the provided ellipsoid at the provided origin. If origin is not on the surface of the ellipsoid, it's surface projection will be used. If origin is at the center of the ellipsoid, an exception will be thrown.
Name Type Default Description
origin Cartesian3 The point on the surface of the ellipsoid where the tangent plane touches.
ellipsoid Ellipsoid Ellipsoid.WGS84 optional The ellipsoid to use.
Throws:

Members

ellipsoid : Ellipsoid

Gets the ellipsoid.

origin : Cartesian3

Gets the origin.

readonlyplane : Plane

Gets the plane which is tangent to the ellipsoid.

readonlyxAxis : Cartesian3

Gets the local X-axis (east) of the tangent plane.

readonlyyAxis : Cartesian3

Gets the local Y-axis (north) of the tangent plane.

Methods

staticCesium.EllipsoidTangentPlane.fromPoints(ellipsoid, cartesians)

Creates a new instance from the provided ellipsoid and the center point of the provided Cartesians.
Name Type Description
ellipsoid Ellipsoid The ellipsoid to use.
cartesians Cartesian3 The list of positions surrounding the center point.

projectPointOntoPlane(cartesian, result) → Cartesian2

Computes the projection of the provided 3D position onto the 2D plane, radially outward from the EllipsoidTangentPlane.ellipsoid coordinate system origin.
Name Type Description
cartesian Cartesian3 The point to project.
result Cartesian2 optional The object onto which to store the result.
Returns:
The modified result parameter or a new Cartesian2 instance if none was provided. Undefined if there is no intersection point

projectPointsOntoEllipsoid(cartesians, result) → Array.<Cartesian3>

Computes the projection of the provided 2D positions onto the 3D ellipsoid.
Name Type Description
cartesians Array.<Cartesian2> The array of points to project.
result Array.<Cartesian3> optional The array of Cartesian3 instances onto which to store results.
Returns:
The modified result parameter or a new array of Cartesian3 instances if none was provided.

projectPointsOntoPlane(cartesians, result) → Array.<Cartesian2>

Computes the projection of the provided 3D positions onto the 2D plane (where possible), radially outward from the global origin. The resulting array may be shorter than the input array - if a single projection is impossible it will not be included.
Name Type Description
cartesians Array.<Cartesian3> The array of points to project.
result Array.<Cartesian2> optional The array of Cartesian2 instances onto which to store results.
Returns:
The modified result parameter or a new array of Cartesian2 instances if none was provided.
See:
  • EllipsoidTangentPlane.projectPointOntoPlane

projectPointsToNearestOnPlane(cartesians, result) → Array.<Cartesian2>

Computes the projection of the provided 3D positions onto the 2D plane, along the plane normal.
Name Type Description
cartesians Array.<Cartesian3> The array of points to project.
result Array.<Cartesian2> optional The array of Cartesian2 instances onto which to store results.
Returns:
The modified result parameter or a new array of Cartesian2 instances if none was provided. This will have the same length as cartesians.
See:
  • EllipsoidTangentPlane.projectPointToNearestOnPlane

projectPointToNearestOnPlane(cartesian, result) → Cartesian2

Computes the projection of the provided 3D position onto the 2D plane, along the plane normal.
Name Type Description
cartesian Cartesian3 The point to project.
result Cartesian2 optional The object onto which to store the result.
Returns:
The modified result parameter or a new Cartesian2 instance if none was provided.