As the progress of 3D rendering technology and the changes of market demand, the 3D application has been widely used and reached as far as education, entertainment, medical treatment, city planning, military training ...As the progress of 3D rendering technology and the changes of market demand, the 3D application has been widely used and reached as far as education, entertainment, medical treatment, city planning, military training and so on. Its trend is gradually changed from client to web, and so many people start to research the 3D graphics engine technology on the web. WebGL and HTML5 rise in recent years and WebGL solves two problems of interactive 3D application on the web perfectly. Firstly, it implements the interactive 3D web application by JavaScript without any browser plug-in components. Secondly, it makes graphics rendering using the underlying graphics hardware, which is united, standard and cross-platform OpenGL interface. However, it is very difficult for 3D application web programmer to understand multifarious details. Therefore, a 3D engine based on WebGL comes into being. The paper consults the existing 3D engine design idea, architecture and implementation experience, and designs a 3D graphics engine based on WebGL and Typescript.展开更多
The invention of a family of optically pure electrophilic difluoromethylthiolating reagents 9a-c based on the camphorsultam skeleton was described.These reagents reacted with a variety of soft carbon nucleophiles such...The invention of a family of optically pure electrophilic difluoromethylthiolating reagents 9a-c based on the camphorsultam skeleton was described.These reagents reacted with a variety of soft carbon nucleophiles such as oxazolone,oxindole,benzolactone and β-ketoester in good to excellent enantioselectivities.展开更多
文摘As the progress of 3D rendering technology and the changes of market demand, the 3D application has been widely used and reached as far as education, entertainment, medical treatment, city planning, military training and so on. Its trend is gradually changed from client to web, and so many people start to research the 3D graphics engine technology on the web. WebGL and HTML5 rise in recent years and WebGL solves two problems of interactive 3D application on the web perfectly. Firstly, it implements the interactive 3D web application by JavaScript without any browser plug-in components. Secondly, it makes graphics rendering using the underlying graphics hardware, which is united, standard and cross-platform OpenGL interface. However, it is very difficult for 3D application web programmer to understand multifarious details. Therefore, a 3D engine based on WebGL comes into being. The paper consults the existing 3D engine design idea, architecture and implementation experience, and designs a 3D graphics engine based on WebGL and Typescript.
基金The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China(Nos.21625206,21632009,21421002,21572258)。
文摘The invention of a family of optically pure electrophilic difluoromethylthiolating reagents 9a-c based on the camphorsultam skeleton was described.These reagents reacted with a variety of soft carbon nucleophiles such as oxazolone,oxindole,benzolactone and β-ketoester in good to excellent enantioselectivities.
