MediaScheme Position Procedure.
Build a new position that represents the point
at (col,row).
Accessing Components
(position-colpos)
MediaScheme Position Procedure.
Extract the column from position pos.
(position-rowpos)
MediaScheme Position Procedure.
Extract the row from position pos.
Miscellaneous
(position?value)
MediaScheme Position Procedure.
Determine if value is a position (or can
be interpreted as such).
(position-offsetpositionhoffvoff)
MediaScheme Position Procedure.
Create a new position, offset from position
horizontally by hoff and vertically
by voff.
(position-distancepos1pos2)
MediaScheme Position Procedure.
Compute the distance between pos1 and
pos2.
(position-interpolatepos1pos2percent)
MediaScheme Position Procedure.
Create a new position which is percent
(expressed as a real number between 0 and 1) of the way from
pos1 to pos2
(random-positionsncolsrows)
MediaScheme Position Procedure.
Create n positions, each of which is
difficult to predict and each with a non-negative column less
than cols and a non-negative row less
than rows.