文章地址:https://zhuanlan.zhihu.com/p/343757223
示例:
mapbox/maptalks + regl 构建一个最小的地形展示 demo
Home Page: https://sakitam-gis.github.io/simple-terrain-viz/packages/mapbox-regl/demo/index.html
maptalks的示例中,因为会同时加载3个级别的瓦片,最低级别瓦片因为覆盖的范围较大,会覆盖掉当前瓦片,出现模糊现象:
解决方案是通过给不同级别瓦片,设置不同的stencil值,通过模板测试,来解决父级瓦片覆盖问题。
强制父级瓦片绘制时,子级别瓦片绘制的区域无法通过模板测试,就不会绘制了。
代码如下:
stencil: {
enable: true,
func: {
cmp: '<=',
ref: (context, props) => { return props.zoom; }
}
},
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