引用CityEngine帮助中的说明： front, back, left, right, top, bottom: The y-normals of the components are analyzed by classifying their directions into the corresponding quadrants (in relation to the local coordinate system of the current shape).
关于Local Coordinate System：
On generation, a local coordinate system is defined for each shape. The origin is placed at the first point of the initial shape's first edge, and the axes are oriented such that the x-axis is along the first edge, the y-axis is along the first face's normal and the z-axis is perpendicular to the former two.
The orientation and the position of the object system can be queried (see the initialShape attribute in the CGA shape grammar reference).
4 个回复
慕晓燕 - 长期ArcGIS爱好者
赞同来自: GIS知乎
这个问题挺好的，这是使用 CityEgnine 时都会遇到的困惑。
这个前后左右是相对于模型自身的坐标系而言的，我写了个简单的脚本帮助你理解，如附图。
引用CityEngine帮助中的说明：
front, back, left, right, top, bottom: The y-normals of the components are analyzed by classifying their directions into the corresponding quadrants (in relation to the local coordinate system of the current shape).
关于Local Coordinate System：
On generation, a local coordinate system is defined for each shape. The origin is placed at the first point of the initial shape's first edge, and the axes are oriented such that the x-axis is along the first edge, the y-axis is along the first face's normal and the z-axis is perpendicular to the former two.
The orientation and the position of the object system can be queried (see the initialShape attribute in the CGA shape grammar reference).
慕晓燕 - 长期ArcGIS爱好者
赞同来自: 陈於立
lijian_asd - 90后 新手
赞同来自:
zrli2018 - 90
赞同来自:
要回复问题请先登录或注册
发起人
90后 新手
相关问题
问题状态
—— 扫技术支持中心微信服务号！
—— 让GIS知乎问答随时随地！