Chapter 2: Getting Started Hello World Hello World Enhanced A simple "Hello World" application that shows the basics of how to use an Actionscr ipt 3.0 class in an application. The Enhanced version adds a name-checking feature. These exam

PV3D-3.基本几何体，快速上手，各种几何体操作。-PV3D-3. Basic geometry, Quick Start, a variety of geometric operations.

The $1 Unistroke Recognizer is a 2-D single-stroke recognizer designed for rapid prototyping of gesture-based user interfaces. In machine learning terms, $1 is an instance-based nearest-neighbor classifier with a Euclidean scoring function, i.e., a g