benloong issues

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                                            benloong

could you explain the theory of fixes for rays with negative direction?

``` cpp // fixes for rays with negative direction if(ray.direction[0] < 0.0f){ ray.origin[0] = octree->size[0] - ray.origin[0]; ray.direction[0] = - ray.direction[0]; a |= 4 ; //bitwise OR (latest bits are...

对曲线重复求值了？

https://github.com/tomtc123/ugui-Tween-Tool/blob/65da54aa3d91cf53e3b9a176c1c865c12616a7bd/uGUI/Assets/uGUI/Scripts/Tween/Tweener.cs#L172

热更新失败会造成资源丢失

https://github.com/cocos-creator/cocos2d-x-lite/blob/7f320fa01140fc6e20b3a09083d624d89289b375/extensions/assets-manager/AssetsManagerEx.cpp#L881 这里预先删除掉了文件，当后续资源下载失败的情况下会造成资源丢失。如果初始场景用到该资源则不能正常开启游戏。应该先缓存到一个删除列表中，统一在在`updateSucceed`中合并资源时删除该列表中的文件

2.2.x 版本模拟器运行 string.localeCompare 会崩溃

* Creator 版本：2.2.1, 2.2.2 * 目标平台：模拟器 * 详细报错信息，包含调用堆栈： Simulator: 0 Simulator 0x000000010ecdcb63 v8::base::debug::StackTrace::StackTrace() + 19 1 Simulator 0x000000010ece199b v8::platform::(anonymous namespace)::PrintStackTrace() + 27 2 Simulator 0x000000010ecd73f5 V8_Fatal(char const*, int, char...