Cesium JS API
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PolylineArrowMaterialProperty

PolylineArrowMaterialProperty 更新 Polyline 颜色和箭头的属性。

语法

new Cesium.PolylineArrowMaterialProperty(options)

参数

参数名称 类型 默认值 描述
options Object 配置属性。必须包括以下属性:
options.color Cesium.Color Cesium.Color.WHITE Polyline 的颜色
options.arrowColor Cesium.Color Cesium.Color.WHITE 箭头的颜色
options.alpha Number 1.0 Polyline 的不透明度
options.arrowSize Number 50.0 箭头的大小

示例

var redColor = Cesium.Color.RED;
var blackColor = Cesium.Color.BLACK;
var greenColor = Cesium.Color.GREEN;
var arrowSize = 30;

// 红色的 Polyline,箭头为黑色,大小为 arrowSize
var redArrowProperty = new Cesium.PolylineArrowMaterialProperty({
    color: redColor,
    arrowColor: blackColor,
    arrowSize: arrowSize
});

// 黑色的 Polyline,箭头为绿色,大小为 arrowSize
var blackArrowProperty = new Cesium.PolylineArrowMaterialProperty({
    color: blackColor,
    arrowColor: greenColor,
    arrowSize: arrowSize
});

注意事项

  • 不支持 .withAlpha() 方法,使用 options.alpha 设置不透明度。
  • 类型为 MaterialProperty,可被用于任何需要 MaterialProperty 对象的属性中。例如:PolylineGraphics.material
  • Polyline 的箭头是由一个向量和一个三角形构成,向量指向 Polyline 末尾,三角形在向量末尾垂直于 Polyline。
  • arrowSize 参数为三角形的基底宽度。