new CircleGeometry
A Geometry that represents vertices and indices for a circle on the ellipsoid.
Parameters:
| Name | Type | Argument | Default | Description |
|---|---|---|---|---|
options.center |
Cartesian3 | The circle's center point in the fixed frame. | ||
options.radius |
Number | The radius in meters. | ||
options.ellipsoid |
Ellipsoid |
<optional> |
Ellipsoid.WGS84 | The ellipsoid the circle will be on. |
options.height |
Number |
<optional> |
0.0 | The height above the ellipsoid. |
options.granularity |
Number |
<optional> |
0.02 | The angular distance between points on the circle in radians. |
options.vertexFormat |
VertexFormat |
<optional> |
VertexFormat.DEFAULT | The vertex attributes to be computed. |
options.extrudedHeight |
Number |
<optional> |
0.0 | The height of the extrusion relative to the ellipsoid. |
options.stRotation |
Number |
<optional> |
0.0 | The rotation of the texture coordinates, in radians. A positive rotation is counter-clockwise. |
Throws:
-
DeveloperError : center is required.
-
DeveloperError : radius is required.
-
DeveloperError : radius must be greater than zero.
-
DeveloperError : granularity must be greater than zero.
Example
// Create a circle.
var ellipsoid = Ellipsoid.WGS84;
var circle = new CircleGeometry({
ellipsoid : ellipsoid,
center : ellipsoid.cartographicToCartesian(Cartographic.fromDegrees(-75.59777, 40.03883)),
radius : 100000.0
});
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.