Plane

new Cesium.Plane(normal, distance)
@cesium/engine/Source/Core/Plane.js 34

A plane in Hessian Normal Form defined by 
ax + by + cz + d = 0
where (a, b, c) is the plane's normal, d is the signed distance to the plane, and (x, y, z) is any point on the plane.
Name Type Description
normal Cartesian3 The plane's normal (normalized).
distance number The shortest distance from the origin to the plane. The sign of distance determines which side of the plane the origin is on. If distance is positive, the origin is in the half-space in the direction of the normal; if negative, the origin is in the half-space opposite to the normal; if zero, the plane passes through the origin.
Throws:
Example:
// The plane x=0
const plane = new Cesium.Plane(Cesium.Cartesian3.UNIT_X, 0.0);

Members

static constant Cesium.Plane.ORIGIN_XY_PLANE : Plane
@cesium/engine/Source/Core/Plane.js 295

A constant initialized to the XY plane passing through the origin, with normal in positive Z.

static constant Cesium.Plane.ORIGIN_YZ_PLANE : Plane
@cesium/engine/Source/Core/Plane.js 303

A constant initialized to the YZ plane passing through the origin, with normal in positive X.

static constant Cesium.Plane.ORIGIN_ZX_PLANE : Plane
@cesium/engine/Source/Core/Plane.js 311

A constant initialized to the ZX plane passing through the origin, with normal in positive Y.

distance : number
@cesium/engine/Source/Core/Plane.js 65

The shortest distance from the origin to the plane. The sign of distance determines which side of the plane the origin is on. If distance is positive, the origin is in the half-space in the direction of the normal; if negative, the origin is in the half-space opposite to the normal; if zero, the plane passes through the origin.

normal : Cartesian3
@cesium/engine/Source/Core/Plane.js 54

The plane's normal.

Methods

static Cesium.Plane.clone(plane, result) → Plane
@cesium/engine/Source/Core/Plane.js 254

Duplicates a Plane instance.
Name Type Description
plane Plane The plane to duplicate.
result Plane optional The object onto which to store the result.
Returns:
The modified result parameter or a new Plane instance if one was not provided.

static Cesium.Plane.equals(left, right) → boolean
@cesium/engine/Source/Core/Plane.js 277

Compares the provided Planes by normal and distance and returns true if they are equal, false otherwise.
Name Type Description
left Plane The first plane.
right Plane The second plane.
Returns:
true if left and right are equal, false otherwise.

static Cesium.Plane.fromCartesian4(coefficients, result) → Plane
@cesium/engine/Source/Core/Plane.js 119

Creates a plane from the general equation
Name Type Description
coefficients Cartesian4 The plane's normal (normalized).
result Plane optional The object onto which to store the result.
Returns:
A new plane instance or the modified result parameter.
Throws:

static Cesium.Plane.fromPointNormal(point, normal, result) → Plane
@cesium/engine/Source/Core/Plane.js 83

Creates a plane from a normal and a point on the plane.
Name Type Description
point Cartesian3 The point on the plane.
normal Cartesian3 The plane's normal (normalized).
result Plane optional The object onto which to store the result.
Returns:
A new plane instance or the modified result parameter.
Throws:
Example:
const point = Cesium.Cartesian3.fromDegrees(-72.0, 40.0);
const normal = ellipsoid.geodeticSurfaceNormal(point);
const tangentPlane = Cesium.Plane.fromPointNormal(point, normal);

static Cesium.Plane.getPointDistance(plane, point) → number
@cesium/engine/Source/Core/Plane.js 158

Computes the signed shortest distance of a point to a plane. The sign of the distance determines which side of the plane the point is on. If the distance is positive, the point is in the half-space in the direction of the normal; if negative, the point is in the half-space opposite to the normal; if zero, the plane passes through the point.
Name Type Description
plane Plane The plane.
point Cartesian3 The point.
Returns:
The signed shortest distance of the point to the plane.

static Cesium.Plane.projectPointOntoPlane(plane, point, result) → Cartesian3
@cesium/engine/Source/Core/Plane.js 175

Projects a point onto the plane.
Name Type Description
plane Plane The plane to project the point onto
point Cartesian3 The point to project onto the plane
result Cartesian3 optional The result point. If undefined, a new Cartesian3 will be created.
Returns:
The modified result parameter or a new Cartesian3 instance if one was not provided.

static Cesium.Plane.transform(plane, transform, result) → Plane
@cesium/engine/Source/Core/Plane.js 207

Transforms the plane by the given transformation matrix.
Name Type Description
plane Plane The plane.
transform Matrix4 The transformation matrix.
result Plane optional The object into which to store the result.
Returns:
The plane transformed by the given transformation matrix.
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