!viewpoint¶

ነባሪ ዋጋ
x = (xmin + xmax)/2.0,
y = ymin + 1.5 *(ymax – ymin),
z = zmin + 1.5 *(zmax – zmin)

(ነባሪ ዋጋ: የውሂቡ ማዕከል)

up_direction: በViewpoint, look_at_point እና up_direction የእይታ ፍሬሙን ይገልጻል።
              ነባሪ : 0.0 0.0 1.0

የእይታ መጋጠሚያ ፍሬም:
              መነሻ ነጥብ : look_at_point
              z ዘንግ      : viewpoint - look_at_point
              x ዘንግ      : up × z axis
              y ዘንግ      : z axis × x axis