V1.0.0-rc.21 released

• VectorLayer支持碰撞 由 @deyihu 在 #1950 发表
• 修复ImageBitmap造成的Chromium内存问题 by @deyihu 在 #1957
• 修复UIComponent高度计算错误 by @deyihu in #1958
• Layer添加visiblechange事件 by @deyihu in #1961
• Tilelayer支持自定义loadTileBitMap by @deyihu in #1966
• 一些对地形的调整 由 @fuzhenn 在 #1954 发表
• 修复 uicomponent autopan的bug by @deyihu in #1968
• 在setCenter和fixExtent中增加padding选项，由@Link-Fight在https://github.com/maptalks/maptalks.js/pull/1417。
• 添加Map.setCameraPosition用于设置相机位置 由 @yy923683900 在#1975

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What's Changed

• VectorLayer support collision by @deyihu in #1950
• vectorlayer collison support delay time when map Interacting by @deyihu in #1953
• fix Memory explosion in chromium by @deyihu in #1957
• fix UIComponent altitude cal error by @deyihu in #1958
• Layer add visiblechange event by @deyihu in #1961
• Tilelayer support custom loadTileBitMap by @deyihu in #1966
• tweaks for terrain by @fuzhenn in #1954
• fix uicomponent autopan by @deyihu in #1968
• Add padding options to setCenter and fixExtent by @Link-Fight in #1417
• add set camera position api by @yy923683900 in #1975

New Contributors

• @Link-Fight made their first contribution in #1417

Full Changelog: v1.0.0-rc.20...v1.0.0-rc.21