This example moves the view located at (0, 0, 0) and directed toward (1, 1, -1) (toward the inside of the upper right of the screen) by 10 in the direction of the view.
#define VIEW_PX 0.f
#define VIEW_PY 0.f
#define VIEW_PZ 0.f
#define VIEW_VX 1.f
#define VIEW_VY 1.f
#define VIEW_VZ -1.f
#define VIEW_ROLL 0
NJS_VIEW v;
v.px = VIEW_PX;
v.py = VIEW_PY;
v.pz = VIEW_PZ;
v.vx = VIEW_VX;
v.vy = VIEW_VY;
v.vz = VIEW_VZ;
v.roll = NJM_DEG_ANG(VIEW_ROLL);
njUnitCurrentViewVector(&v);
njForwardViewRelative(&v, 10.f);
njSetView(&v);
njClearMatrix();