SD APPLICATION NOTE 4
Copyright © 2003 William B. Ackerman
COMMON SPOT
There are several “common spot” concepts available in Sd. They
were designed to reflect the way these concepts are used by top challenge
callers.
The general way these concepts work is that some or all of the people in
the formation are in right-handed miniwaves. They are to act as though
they got there by colliding from the previous call, and are to do the
“common spot” call as though they hadn't taken right hands, but
actually occupied the spot where the previous call would have left them.
. . 1B> 1G>
. . 2G< 2B<
4B> 4G> . .
3G< 3B< . .
COMMON SPOT COLUMNS circulate
3G> 2G< 2B< 1B>
3B< 4B> 4G> 1G<
There are many concepts in this family. They name the formation that
the dancers are supposed to imagine themselves in, as opposed to the
actual setup. Sometimes “common spot” is used, and sometimes a more
specific designation, such as “common point” or “common end”. In
many cases it doesn't matter whether “common spot” or a more specific
concept was used.
If the concept names a formation with specific facing direction assumptions,
such as “waves” or “1/4 tag”, there will be an implicit assumption given
to the computer dancers after they separate themselves. That is, after
“common spot waves”, the separated dancers may assume that they are in
waves of the appropriate handedness.
Common point galaxy is done from a “rigger” or “bat” setup (box
with miniwave “wings”). The wings act as collided galaxy points. The other
points are absent.
4GV 1B^
4B^ 3GV 1G^ 2BV
3BV 2G^
COMMON POINT GALAXY galaxy circulate
1B<
4B^ 1G^
4GV 2G^
3GV 2BV
3B>
Common point diamonds and common spot diamonds are they same.
They are done from the setup obtained by doing a 6x2 acey deucey from
facing diamonds.
. 4B>
. 2G<
3B^ 1G^ 3GV 1BV
4G> .
2B< .
COMMON SPOT DIAMONDS exchange the diamonds 1/4
3B> 1G>
2B^ 4G^ 2GV 4BV
3G< 1B<
Common point hourglass and common spot hourglass are similar.
. 4B>
. 2G<
1G<
3B^ 1BV
3G>
4G> .
2B< .
COMMON SPOT HOURGLASS unwrap the hourglass
2G< 2B> 3B> 3G<
1G> 1B< 4B< 4G>
Common spot point-to-point diamonds are done from point-to-point diamonds
in which either the interior points have collided or the centers of each diamond
have collided. The latter situation can arise from partial exchange the diamonds.
It can not arise from a diamond circulate, because the Callerlab definition
specifically makes the dancers recenter themselves.
. 3B>
. 2B<
2G^ 3GV 1G^ 4GV
4B> .
1B< .
COMMON SPOT POINT-TO-POINT DIAMONDS diamond circulate
2G> 1G>
1B^ 4B^ 2BV 3BV
3G< 4G<
4B> 1G>
4G^ 3BV 1B^ 2GV
3G< 2B<
COMMON SPOT POINT-TO-POINT DIAMONDS diamond circulate
4G< 1B>
3G^ 4BV 2B^ 1GV
3B< 2G>
Common spot 1/4 tags and common spot 1/4 lines are done
from a tidal wave. The live dancers imagine that they have collided in
the center wave or 2-faced line. The name of the concept determines how
they collect themselves into groups, in case that matters. Nothing is
implied about the facing directions of the phantom outsides. You may
add something like assume 1/4 tags or assume normal
diamonds if you wish.
4B^ 3GV 4G^ 3BV 1B^ 2GV 1G^ 2BV
COMMON SPOT 1/4 TAGS fall into a column
4B^ 1G^
3B^ 2G^
4GV 1BV
3GV 2BV
4B^ 3GV 4G^ 3BV 1B^ 2GV 1G^ 2BV
COMMON SPOT 1/4 LINES, ASSUME 1/4 LINES, make a pass
1B> 4G<
3G< 2B>
4B< 1G>
2G> 3B<
The various types of common spot lines concepts may be done from
a 2x4, 2x6, or 2x8.
From a 2x4, everyone has collided in the center. The ends of the imagined
lines are all phantoms. You may use common spot or common center,
indicating either lines or waves. If you indicate waves, there will be an
implicit assume waves on the result.
3G^ 4BV 2G^ 1BV
3B^ 4GV 2B^ 1GV
COMMON CENTER WAVES touch of class
4G^ 1BV 4BV 1G^
3GV 2B^ 3B^ 2GV
From a 2x6 that is a parallelogram, the “wings” are ends that have
collided, and the center box are normal centers. You may use
common spot lines or common end lines.
. . 3B^ 4GV 2B^ 1GV
3G^ 4BV 2G^ 1BV . .
COMMON END LINES switch to an hourglass
2B<
3BV 4G^
3G^ 1GV
2GV 1B^
4B>
From a 2x6 that has only the outer triple boxes occupied, everyone are
ends that have collided. You may use common spot or common
end, indicating either lines or waves. If you indicate waves, there
will be an implicit assume waves on the result.
4B^ 1BV . . 4G^ 1GV
3G^ 2GV . . 3B^ 2BV
COMMON END WAVES scatter scoot
4GV 1B^ 1G^ 4BV
2B^ 3GV 3BV 2G^
From a 2x8 that has everyone in a miniwave with someone, with those
miniwaves arranged as either a fully offset parallelogram or as a
“miniwave zipper”, everyone has collided on the spot in the imagined
2x4 that corresponds to the location of their miniwave in the actual
2x8. You may use common spot lines, common spot waves, or
common spot two-faced lines. If you indicate waves or two-faced
lines, there will be an implicit assumption on the result, and people
will be grouped in a way consistent with that, in case it matters.
. . 3G^ 4BV . . 2G^ 1BV
3B^ 4GV . . 2B^ 1GV . .
COMMON SPOT TWO-FACED LINES double down
2GV 3BV 3GV 2BV
4B^ 1G^ 1B^ 4G^
. . 3G^ 4BV . . 2G^ 1BV
3B^ 4GV . . 2B^ 1GV . .
COMMON SPOT WAVES double down
2GV 3BV 2B^ 1G^
3GV 4BV 1B^ 4G^
. . . . 3G^ 4BV 2G^ 1BV
3B^ 4GV 2B^ 1GV . . . .
COMMON SPOT LINES presto
4B^ 3BV
2GV 1G^
3GV 4G^
1B^ 2BV
The common spot columns concept may be done from
“clumps”, “stairsteps”, Z columns, or waves. From waves,
everyone has collided and are the centers of the imagined columns.
From “clumps” or “stairsteps”, everyone has collided.
. 4G> . 4B>
. 1B< . 1G<
3G> . 3B> .
2B< . 2G< .
COMMON SPOT COLUMNS cross your neighbor
2BV 3G^ 1BV 4G^ 2GV 3B^ 1GV 4B^
From Z columns, some people (those that aren't centered) have collided,
and the others are normal.
. 4G> . .
1G> 1B< . 4B>
2B< . 3B> 3G<
. . 2G< .
COMMON SPOT COLUMNS follow thru
2B^ 1BV 1GV 4GV 2G^ 3G^ 3B^ 4BV