椭圆拟合，用于在jpg格式的图片上寻找椭圆，并进行拟合,Ellipse fitting to the picture in jpg format to find oval, and fitting

opengl载入jpg、tga纹理。对初学者有帮助。-The opengl Loading JPG, tga texture. Help for beginners.

在OPENGL程序中实现天空盒，可根据鼠标的移动位置自动追踪视角，效果很好，缝隙较少。程序中可以除了可使用BMP贴图外，还可以使用jpg格式的贴图。-The sky box in the OPENGL program, can automatically track angle according to the location of the mouse, the effect is very good, the gap is less. The program can be used in B