INIT3D sets the absolute origin, rotations, and scale factor of the 3-d package. These functions are distinct from the functions of PLOT. INIT3D may be called at any time to reset these functions without closing the plot package. The plot package must be opened with FRAME\ prior to the call to INIT3D.
CALL INIT3D (x,y,z,xa,ya,za,t,ds,sf,i)
x,y,z (R): coordinates of view point (looking from)
xa,ya,za (R): coordinates of center point (looking to)
t (R): rotation angle around line from (x,y,z) to
(xa,ya,za) in degrees CCW.
ds (R): perspective scale factor (image size/viewing distance)
sf (R): relative scale factor
i (I): plotting flag ( -1 = do not plot, scaling only)