[ 源代码： node-d3-shape ]
软件包：node-d3-shape（1.3.7-5）
Graphical primitives for visualization, such as lines and areas
Visualizations typically consist of discrete graphical marks, such as symbols, arcs, lines and areas. While the rectangles of a bar chart may be easy enough to generate directly using SVG or Canvas, other shapes are complex, such as rounded annular sectors and centripetal Catmull–Rom splines.
This module provides a variety of shape generators for your convenience.
Node.js is an event-based server-side JavaScript engine.