new EllipseGeometry
A Geometry that represents geometry for an ellipse on an ellipsoid
Parameters:
| Name | Type | Argument | Default | Description |
|---|---|---|---|---|
options.center |
Cartesian3 | The ellipse's center point in the fixed frame. | ||
options.semiMajorAxis |
Number | The length of the ellipse's semi-major axis in meters. | ||
options.semiMinorAxis |
Number | The length of the ellipse's semi-minor axis in meters. | ||
options.ellipsoid |
Ellipsoid |
<optional> |
Ellipsoid.WGS84 | The ellipsoid the ellipse will be on. |
options.height |
Number |
<optional> |
0.0 | The height above the ellipsoid. |
options.extrudedHeight |
Number |
<optional> |
The height of the extrusion. | |
options.rotation |
Number |
<optional> |
0.0 | The angle from north (clockwise) in radians. The default is zero. |
options.stRotation |
Number |
<optional> |
0.0 | The rotation of the texture coordinates, in radians. A positive rotation is counter-clockwise. |
options.granularity |
Number |
<optional> |
0.02 | The angular distance between points on the ellipse in radians. |
options.vertexFormat |
VertexFormat |
<optional> |
VertexFormat.DEFAULT | The vertex attributes to be computed. |
Throws:
-
DeveloperError : center is required.
-
DeveloperError : semiMajorAxis is required.
-
DeveloperError : semiMinorAxis is required.
-
DeveloperError : semiMajorAxis and semiMinorAxis must be greater than zero.
-
DeveloperError : semiMajorAxis must be larger than the semiMajorAxis.
-
DeveloperError : granularity must be greater than zero.
Example
// Create an ellipse.
var ellipsoid = Ellipsoid.WGS84;
var ellipse = new EllipseGeometry({
ellipsoid : ellipsoid,
center : ellipsoid.cartographicToCartesian(Cartographic.fromDegrees(-75.59777, 40.03883)),
semiMajorAxis : 500000.0,
semiMinorAxis : 300000.0,
rotation : CesiumMath.toRadians(60.0)
});
Source:
Members
-
attributes :GeometryAttributes
-
An object containing GeometryAttribute properties named after each of the
truevalues of the VertexFormat option.See:
-
boundingSphere :BoundingSphere
-
A tight-fitting bounding sphere that encloses the vertices of the geometry.
-
indices :Array
-
Index data that, along with Geometry#primitiveType, determines the primitives in the geometry.
-
primitiveType :PrimitiveType
-
The type of primitives in the geometry. For this geometry, it is PrimitiveType.TRIANGLES.