Summary

Constructor

let point1 = new hmap.geom.Point(new hmap.basetype.Coordinate(120,30,0));
let point2 = new hmap.geom.Point(new hmap.basetype.Coordinate(120,31,0));
let point3 = new hmap.geom.Point(new hmap.basetype.Coordinate(121,31,0));
let point4 = new hmap.geom.Point(new hmap.basetype.Coordinate(121,33,0));
let bezierNGeom = new hmap.geomext.BezierCurveN([point1,point2,point3,point4]);

Methods

getBBox() → {module:basetype~BBox}

获取贝塞尔曲线的三维包围盒

Returns:

module:basetype~BBox -

返回三维包围盒

getCoordSeq() → {module:basetype~CoordSeq}

获取贝塞尔曲线的坐标序列

Returns:

module:basetype~CoordSeq -

坐标序列

Example

let coordSeq = bezierNGeom.getCoordSeq();

getLength(srid) → {Number}

计算贝塞尔曲线组成点连线的长度

Parameters:

Name	Type	Description
srid	String	坐标系类型。

Returns:

Number -

线段的三维长度，单位是米。

Example

let result = bezierNGeom.getLength(4326);

getType() → {String}

获取几何体类型

Returns:

String -

hmap拓展的几何类型，参见module:geom~GeometryExtType

Example

let type = bezierNGeom.getType();

setCtrlPoints(points)

重新设置贝塞尔曲线控制点。

Parameters:

Name	Type	Description
points	Array.<module:geom~Point>	点几何体数组，数组长度小于2或非数组类型，则抛出构造异常。

Throws:

RangeError | TypeError -

数组长度小于2或非数组类型，则抛出构造异常。

Example

let point1 = new hmap.geom.Point(new hmap.basetype.Coordinate(120,30,0));
 let point2 = new hmap.geom.Point(new hmap.basetype.Coordinate(120,31,0));
 let point3 = new hmap.geom.Point(new hmap.basetype.Coordinate(121,31,0));
 let point4 = new hmap.geom.Point(new hmap.basetype.Coordinate(121,33,0));
 bezierNGeom.setCtrlPoints([point1,point2,point3,point4]);

toLine() → {module:geom~Line}

将贝塞尔曲线转化为线几何

Returns:

module:geom~Line -

线几何

Example

let line = bezierNGeom.toLine();