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EllipsoidRhumbLine

new Cesium.EllipsoidRhumbLine(start, end, ellipsoid)
engine/Source/Core/EllipsoidRhumbLine.js 392

Initializes a rhumb line on the ellipsoid connecting the two provided planetodetic points.
Name Type Default Description
start Cartographic optional The initial planetodetic point on the path.
end Cartographic optional The final planetodetic point on the path.
ellipsoid Ellipsoid Ellipsoid.WGS84 optional The ellipsoid on which the rhumb line lies.
Throws:
  • DeveloperError : angle between start and end must be at least 0.0125 radians.

Members

readonly ellipsoid : Ellipsoid
engine/Source/Core/EllipsoidRhumbLine.js 415

Gets the ellipsoid.

readonly end : Cartographic
engine/Source/Core/EllipsoidRhumbLine.js 455

Gets the final planetodetic point on the path.

readonly heading : number
engine/Source/Core/EllipsoidRhumbLine.js 467

Gets the heading from the start point to the end point.

readonly start : Cartographic
engine/Source/Core/EllipsoidRhumbLine.js 443

Gets the initial planetodetic point on the path.

readonly surfaceDistance : number
engine/Source/Core/EllipsoidRhumbLine.js 427

Gets the surface distance between the start and end point

Methods

static Cesium.EllipsoidRhumbLine.fromStartHeadingDistance(start, heading, distance, ellipsoid, result) → EllipsoidRhumbLine
engine/Source/Core/EllipsoidRhumbLine.js 488

Create a rhumb line using an initial position with a heading and distance.
Name Type Default Description
start Cartographic The initial planetodetic point on the path.
heading number The heading in radians.
distance number The rhumb line distance between the start and end point.
ellipsoid Ellipsoid Ellipsoid.WGS84 optional The ellipsoid on which the rhumb line lies.
result EllipsoidRhumbLine optional The object in which to store the result.
Returns:
The EllipsoidRhumbLine object.

findIntersectionWithLatitude(intersectionLatitude, result) → Cartographic
engine/Source/Core/EllipsoidRhumbLine.js 707

Provides the location of a point at the indicated latitude along the rhumb line. If the latitude is outside the range of start and end points, the first intersection with the latitude from that start point in the direction of the heading is returned. This follows the spiral property of a rhumb line.
Name Type Description
intersectionLatitude number The latitude, in radians, at which to find the intersection point from the starting point using the heading.
result Cartographic optional The object in which to store the result.
Returns:
The location of the intersection point along the rhumb line, undefined if there is no intersection or infinite intersections.
Throws:
  • DeveloperError : start and end must be set before calling function findIntersectionWithLongitude.

findIntersectionWithLongitude(intersectionLongitude, result) → Cartographic
engine/Source/Core/EllipsoidRhumbLine.js 603

Provides the location of a point at the indicated longitude along the rhumb line. If the longitude is outside the range of start and end points, the first intersection with the longitude from the start point in the direction of the heading is returned. This follows the spiral property of a rhumb line.
Name Type Description
intersectionLongitude number The longitude, in radians, at which to find the intersection point from the starting point using the heading.
result Cartographic optional The object in which to store the result.
Returns:
The location of the intersection point along the rhumb line, undefined if there is no intersection or infinite intersections.
Throws:
  • DeveloperError : start and end must be set before calling function findIntersectionWithLongitude.

interpolateUsingFraction(fraction, result) → Cartographic
engine/Source/Core/EllipsoidRhumbLine.js 551

Provides the location of a point at the indicated portion along the rhumb line.
Name Type Description
fraction number The portion of the distance between the initial and final points.
result Cartographic optional The object in which to store the result.
Returns:
The location of the point along the rhumb line.

interpolateUsingSurfaceDistance(distance, result) → Cartographic
engine/Source/Core/EllipsoidRhumbLine.js 570

Provides the location of a point at the indicated distance along the rhumb line.
Name Type Description
distance number The distance from the inital point to the point of interest along the rhumbLine.
result Cartographic optional The object in which to store the result.
Returns:
The location of the point along the rhumb line.
Throws:
  • DeveloperError : start and end must be set before calling function interpolateUsingSurfaceDistance

setEndPoints(start, end)
engine/Source/Core/EllipsoidRhumbLine.js 535

Sets the start and end points of the rhumb line.
Name Type Description
start Cartographic The initial planetodetic point on the path.
end Cartographic The final planetodetic point on the path.
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