c语言写的，飞机游戏,锻炼基本功的,三维射线追踪的代码,内包含测试图片.-c language written in the aircraft games, basic skills training, 3D ray tracing code, which includes test pictures.

AABB与Ray碰撞测试，内有简单测试 -AABB and Ray hit test, there are simple tests