BufferPolyline
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View bound to the underlying buffer data of a BufferPolylineCollection.

BufferPolyline instances are flyweights: a single BufferPolyline instance can be temporarily bound to any conceptual "polyline" in a BufferPolylineCollection, allowing very large collections to be iterated and updated with a minimal memory footprint.

Represented as two (2) or more positions.

new Cesium.BufferPolyline()
engine/Source/Scene/BufferPolyline.js 27

Experimental

This feature is not final and is subject to change without Cesium's standard deprecation policy.

参考:

继承

成员(属性)

featureId : number
engine/Source/Scene/BufferPrimitive.js 145

Feature ID associated with the primitive; not required to be unique.
继承自:

show : boolean
engine/Source/Scene/BufferPrimitive.js 157

Whether primitive is shown.
继承自:

readonly vertexCount : number
engine/Source/Scene/BufferPolyline.js 107

Count of positions (vertices) in this polyline, number of VEC3 elements.

width : number
engine/Source/Scene/BufferPolyline.js 172

Width of polyline, 0–255px.

方法

static Cesium.BufferPolyline.clone(polyline, result) → BufferPolyline
engine/Source/Scene/BufferPolyline.js 79

Copies data from source polyline to result. If the result polyline is not new (the last polyline in the collection) then source and result polylines must have the same vertex counts.
参数名称 类型 描述信息
polyline BufferPolyline
result BufferPolyline
返回值:

getColor(result) → Color
engine/Source/Scene/BufferPrimitive.js 201

Returns the color of primitive.
参数名称 类型 描述信息
result Color
返回值:
继承自:

getPositions(result)
engine/Source/Scene/BufferPolyline.js 120

Returns an array view of this polyline's vertex positions. If 'result' argument is given, vertex positions are written to that array and returned. Otherwise, returns an ArrayView on collection memory — changes to this array will not trigger render updates, which requires `.setPositions()`.
参数名称 类型 描述信息
result Float64Array 可选 return {Float64Array}

setColor(color)
engine/Source/Scene/BufferPrimitive.js 212

Updates the color of primitive.
参数名称 类型 描述信息
color Color
继承自:

setPositions(positions)
engine/Source/Scene/BufferPolyline.js 140

参数名称 类型 描述信息
positions Float64Array

toJSON() → Object
engine/Source/Scene/BufferPolyline.js 191

Returns a JSON-serializable object representing the polyline. This encoding is not memory-efficient, and should generally be used for debugging and testing.
返回值:
JSON-serializable object.
继承自:
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