ex4

这是计算机图形学的内容，可以实现线段的裁剪，初学者适用(This is the content of computer graphics, the cutting line can be achieved, for beginners)

c 实现了以点阵表示的多边形的最小外接矩形，并求出其的面积。(c to achieve a in order to dot-matrix expressed of polygons of the minimum bounding rectangle, and calculated its of the area.)

说明：  关于多边形识别的一个MATLAB源程序。PointInPolygon(Polygon identification on a MATLAB source code. PointInPolygon)

可以用于画世界地图。这个函数可以通过控制经纬度画不同范围的世界地图。(Can be used to draw the world map. This function can be painted by controlling the latitude and longitude of different areas of the world map.)

说明：  这是一个用vc编写的简单的图形查看器程序，它可以用来实现图形查看的功能，好用哦(vc)

一种属性离散化的方法，对粗糙集适用(An attribute discretization method, the rough set for)

说明：  fountain，AS3写的fountain喷泉效果(fountain)

实现一个心行图案的各种二维几何变换（包括同比变换，错切变换，平移变换、旋转变换等）(achieve a mind trip of two-dimensional pictorial geometry transformation (including an transform, shear transformation, translation transform, ROTATION))

二次b样条和三次b样条曲线画法，完全按照定义来做的，支持多个点的绘制。比贝塞尔曲线好画，贝塞尔曲线有三个点和四个点的画法，点再多就需要拟合了(B-spline quadratic and cubic b-spline curve drawing, done in full accordance with the definition of support to draw more points. Good Bibeisaier curve drawing, Bezier curve with three points and four points of the painting, we need to fit the more points)

qquick 学习学习编写qt的快速应用程序的一种qml语言的学习(qquick learning learning qt programming quick application of a qml language learning)