本文主要介绍下opencv中自带的一个随机数发生器的类RNG，这里我用这个类来画一些图形，和基础学习笔记之opencv(13)：基本绘图 一文中类似，只是 这里画出来图像的坐标，大小，颜色，角度等所有信息都是随机的，且是用RNG这个类产生的。参考文献为opencv自带tutiol及其代码。

　　开发环境：opencv2.4.2+Qt4.8.2+ubuntu12.04+QtCreator2.5

　　实验功能：

　　1. 该实验可以画6中几何图形和1个文本显示，每种都是画80个，每画完一个延时100ms。

　　2. 打开软件后，默认画的图为直线。可以在软件的左下角Drawing Type下拉列表中选择不同的几何绘画图形及文字，这6种几何图形分别为画直线，画矩形，画椭圆弧线，画多边形，画圆，画填充多边形。文本显示为显示“OpenCv Forever!”，选择完后在窗口中会自动显示其随机绘图过程，

　　3. 单击Close按钮，退出软件。-This article introduces a random number generator that comes in under opencv class RNG, I use this class to draw some graphics, and study notes based on opencv (13): Basic Drawing a text similar to just draw out the image coordinates, size, color, angle, and all information is random, and this class of RNG. Reference to the opencv own tutiol its code. Development environment: opencv2.4.2+Qt4.8.2+ubuntu12.04+QtCreator2.5 experimental features: (1) The experiment can draw 6 geometry and a text display, each painting are 80 per unfinished a delay of 100ms. 2 Open the software, the default picture shows the straight lines of the painting. Different geometric painting graphics and text in the lower left corner of the software Drawing Type drop-down list, select the six kinds of geometry for drawing straight lines, draw a rectangle, draw elliptical arc, polygon drawing, draw a circle, draw filled polygons. The text display to show " OpenCv Forever!" , Select exhausted in the window w