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[GREG2\]STRIP [X1 Y1 X2 Y2]
Will extract from the current Regular Grid array a strip going through
points (X1,Y1) and (X2,Y2) in User coordinates. If no arguments are
present, it will call the cursor to set the two points. Although the
end points need not be on the map boundaries, STRIP will always produce
a full strip across the map.
For strip parallel to the X or Y map axis, the nearest pixel is used to
fill the values. For any other strip orientation, if the tangent of the
angle is less than (NY-1)/(NX-1) (i.e. if you scan the X map axis faster
than the Y map axis), the number of resulting points on the strip pro-
file will be NX and the user coordinates along the strip will be the map
X coordinate. For each pixel, interpolation along the Y axis is done us-
ing the three nearby Y pixels. A similar situation with X replacing Y
occurs if the angle is larger.
The map user coordinates are put into the X buffer, and map values into
the Y buffer. The strip can then be plotted using CONNECT, but remember
to set decent limits before.