This example rotates the view located at (0, 0, 3000) and directed
towarded (0, 0, -1) (into the screen) around the Y axis by 90
degrees without changing the view location or direction.
#define VIEW_APX 0.f
#define VIEW_APY 0.f
#define VIEW_APZ 3000.f
#define VIEW_AVX 0.f
#define VIEW_AVY 0.f
#define VIEW_AVZ -1.f
#define VIEW_AROLL 0
NJS_VIEW v;
v.apx = VIEW_APX;
v.apy = VIEW_APY;
v.apz = VIEW_APZ;
v.avx = VIEW_AVX;
v.avy = VIEW_AVY;
v.avz = VIEW_AVZ;
v.aroll = NJM_DEG_ANG(VIEW_AROLL);
njRotateViewYAbsolute(&v, NJM_DEG_ANG(90));
njSetView(&v);
njClearMatrix();