A real number whose value ranges from -1.0 to 1.0, indicating the amount to pan in the X direction.
A real number whose value ranges from -1.0 to 1.0, indicating the amount to pan in the Y direction.
The pan command performs a pan operation which is relative to the current view. That is, " pan .1 .2" would move the image 10% of the window width to the right and 20% of the window height upward. Successive pan commands with these same arguments would continue to pan the image. This is in contrast to the panf command, which performs an absolute pan operation.
center3 , latitude , longitude , mapping , panf , zoom3 , zoomf3