在visual c++下用opengl实现中点画圆算法-In visual c++ implementation using the midpoint circle algorithm opengl

用OpenGL实现中点Bresenham算法画直线与圆，改进Bresenham算法画直线-The midpoint of the Bresenham algorithm for drawing a straight line and circle, using OpenGL to improve the Bresenham algorithm draw a straight line

MFC框架，用OpenGL API实现画点，直线和多边形采用Bresenham算法，圆形采用中点圆弧算法实现。-MFC framework using the OpenGL API to draw points, lines and polygons with Bresenham algorithm, and the circular midpoint circle algorithm implementation.