freeglut
glFrustum
gluPerspective
gluLookAt(camPos, camLookAt, upper)
投影矩阵的推导 http://blog.csdn.net/wangdingqiaoit/article/details/39010077
freeglut
glFrustum
gluPerspective
gluLookAt(camPos, camLookAt, upper)
投影矩阵的推导 http://blog.csdn.net/wangdingqiaoit/article/details/39010077