Merge branch 'master' of github.com:dvgis/dc-sdk

README.md

 <a href="https://www.npmjs.com/package/@dvgis/dc-sdk" target="_blank">
  <img src="https://img.shields.io/npm/dt/@dvgis/dc-sdk?logo=npm"/>
 </a>
-<a href="https://resource.dvgis.cn/dc-docs/v2.x" target="_blank">
+<a href="https://resource.dvgis.cn/dc-docs/zh/" target="_blank">
  <img src="https://img.shields.io/badge/docs-online-yellow.svg"/>
 </a>
 <a href="http://dc.dvgis.cn" target="_blank">

README_zh.md

 <a href="https://www.npmjs.com/package/@dvgis/dc-sdk" target="_blank">
  <img src="https://img.shields.io/npm/dt/@dvgis/dc-sdk?logo=npm"/>
 </a>
-<a href="https://resource.dvgis.cn/dc-docs/v2.x/zh" target="_blank">
+<a href="https://resource.dvgis.cn/dc-docs/zh/" target="_blank">
  <img src="https://img.shields.io/badge/docs-online-yellow.svg"/>
 </a>
 <a href="http://dc.dvgis.cn" target="_blank">

docs/zh/api/tile.md

 let terrain = DC.TerrainFactory.createUrlTerrain({
   url: '****/***',
 })
-viewer.addTerrain(terrain)
+viewer.setTerrain(terrain)
 ```
 
 ### static methods

src/modules/material/type/thirdpart.js

 import czm_snoise from '../shader/thirdpart/snoise.glsl'
 import AsphaltMaterial from '../shader/thirdpart/AsphaltMaterial.glsl'
 import BlobMaterial from '../shader/thirdpart/BlobMaterial.glsl'
-import BrickMaterial from '../shader/thirdpart/BlobMaterial.glsl'
+import BrickMaterial from '../shader/thirdpart/BrickMaterial.glsl'
 import CementMaterial from '../shader/thirdpart/CementMaterial.glsl'
 import ErosionMaterial from '../shader/thirdpart/ErosionMaterial.glsl'
 import FacetMaterial from '../shader/thirdpart/FacetMaterial.glsl'