General Program Information
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h3. General Program Information {float:left|border=2px solid black} [!1b.bmp|width=330px!|AutoCAD Cross Program] [!1.bmp|width=330px!|AutoCAD Cross Program] Southeast Isometric View {float} \\ \\ h3. Input Definitions h5. Inputs Needed to Call the Cross Function origin - a 3*1 matrix with |
Input Definitions
Inputs Needed to Call the Cross Function
origin - a 3*1 matrix with x,y,z
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positions
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corresponding
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to
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the
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point
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where
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the
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tee
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will
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be
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drawn.
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ND
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-
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The
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nominal
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diameter
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of
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the
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pipe.
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This
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value
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along
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with
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the
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pipe
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schedule
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is
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used
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to
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determine
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other
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actual
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dimensions
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of
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the
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elbow
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EN
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-
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The
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enumerated
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pipe
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schedule
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type.
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Each
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schedule
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of
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pipe
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is
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represented
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by
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a
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specific
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number
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within
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our
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code.
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Inputs
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Defined
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within
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the
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Cross
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Database
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R1 - The inner radius of the main pipe, defined by outerradius(ND)
R2 - The outer radius of the main pipe, defined by innerD(ND,ED)/2
R3 - The outer radius of the sockets of the tee, defined by ConRadius(ND)
L - The length of the main pipe of the tee, defined by ShortTeeLength(ND)*2
...
H - The depth of the sockets of the tee, defined by SocketDepth(ND)
Inputs Defined within the Cross Function
p1 =
- x : origin0
- y : origin1
- z : origin2
p17 =
- x : origin0
- y : origin2 + R2
- z : origin1
p18 =
- x : origin0
- y : origin2
p19 =
- x : origin0
- y : origin2 + zc
p20 =
- x : origin0 - L/2
- y : origin1
- z : origin2 + L/2
p21 =
- x : origin0 + L/2
- y : origin1
- z : origin2 + L/2
p22 =
- x : origin0 - L/4
- y : origin1 - R1
- z : origin2
p23 =
- x : origin0 + L/4
- y : origin1 - R1
- z : origin2
p24 =
- x : origin0
- y : origin1
- z : origin2 + L/2 - R3
ND = The nominal diameter of the pipe.
R1 = the inner radius of the main pipe.
R2 = the outer radius of the main pipe.
R3 = the outer radius of the four sockets of the tee.
L = the length of the main pipes of the tee.
H = the length of the four sockets of the tee.
win1 =
- x : origin0 - (L/2 + H)
- y : origin1 - R3
- z : origin2
win2 =
- x : origin0 + (L/2 + H)
- y : origin1 + R3
- z : origin2
EN = The pipe schedule
Technical Program Outline
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[!1a.bmp|width=240px!|AutoCAD Cross Program]
{float} |
The Cross program is built on the Tee Program.
Tee1 - builds a tee with origin p1, nominal diameter ND, and pipe schedule EN.
Tee1 <--Tee(p1,ND,EN)
p1 = origin
ND = The nominal diameter of the pipe.
EN = The pipe schedule
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\- EN-The enumerated pipe schedule type. Each schedule of pipe is represented by a specific number within our code. h5. Inputs Defined within the Cross Function p1 = * x : origin{~}0~ * y : origin{~}1~ * z : origin{~}2~ p17 = * x : origin{~}0~ * y : origin{~}2~ + R2 * z : origin{~}1~ p18 = * x : origin{~}0~ * y : origin{~}2~ p19 = * x : origin{~}0~ * y : origin{~}2~ + zc p20 = * x : origin{~}0~ \- L/2 * y : origin{~}1~ * z : origin{~}2~ + L/2 p21 = * x : origin{~}0~ + L/2 * y : origin{~}1~ * z : origin{~}2~ + L/2 p22 = * x : origin{~}0~ \- L/4 * y : origin{~}1~ \- R1 * z : origin{~}2~ p23 = * x : origin{~}0~ + L/4 * y : origin{~}1~ \- R1 * z : origin{~}2~ p24 = * x : origin{~}0~ * y : origin{~}1~ * z : origin{~}2~ + L/2 - R3 ND = The nominal diameter of the pipe. This value along with the pipe schedule is used to determine other actual dimensions of the elbow R1 = the inner radius of the main pipe. R2 = the outer radius of the main pipe. R3 = the outer radius of the four sockets of the tee. L = the length of the main pipes of the tee. H = the length of the four sockets of the tee. win1 = * x : origin{~}0~ \- (L/2 + H) * y : origin{~}1~ \- R3 * z : origin{~}2~ win2 = * x : origin{~}0~ + (L/2 + H) * y : origin{~}1~ + R3 * z : origin{~}2~ EN = The enumerated pipe schedule type. Each schedule of pipe is represented by a specific number within our code. h3. Technical Program Outline The Cross program is built on the [Tee Program|AutoCAD Tee Program]. Resuming after bigunion1: {float:left|border=2px solid black} [!2.bmp|width=240px!|AutoCAD Cross Program] Before mirror3 [!2c.bmp|width=360px!|AutoCAD Cross Program] After mirror3 {float} * |
mirror3
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-
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mirrors
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the
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tee
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around
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the
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centerline
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of
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the
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main
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pipe,
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using
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p17
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to
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select
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the
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tee,
...
then
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reflecting
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it
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over
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a
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mirror
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line
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created
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using
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p18
...
and
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p19
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to
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give
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the
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slope
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and
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direction
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of
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the
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mirror
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line.
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mirror3
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<-
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-
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mirrorA(p17,p18,p19)
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p17
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=
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- x
...
- : origin0
- y : origin2 + R2
- z : origin1
p18 =
- x : origin0
- y : origin2
p19 =
- x : origin0
- y : origin2 + zc
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origin{~}0~ * y : origin{~}2~ + R2 * z : origin{~}1~ p18 = * x : origin{~}0~ * y : origin{~}2~ p19 = * x : origin{~}0~ * y : origin{~}2~ + zc \\ \\ {float:left|border=2px solid black} [!3.bmp|width=560px!|AutoCAD Cross Program] {float} * |
cylinder7
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-
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creates
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a
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cylinder
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of
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radius
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R2
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within
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the
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cross.
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cylinder7
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<-
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-
...
cylinderB(p20,R2,p21)
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p20
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=
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- x
...
- :
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- origin0 - L/2
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- y
...
- :
...
- origin1
- z : origin2 + L/2
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R2
...
-
...
the
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outer
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radius
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of
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the
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main
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pipe.
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p21
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=
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- x
...
- :
...
- origin
...
- 0 +
...
- L/2
...
- y
...
- : origin1
- z : origin2 + L/2
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origin{~}1~ * z : origin{~}2~ + L/2 \\ \\ {float:left|border=2px solid black} [!4a.bmp|width=480px!|AutoCAD Cross Program] [!4b.bmp|width=280px!|AutoCAD Cross Program] Free Rotation used to show the cross is now hollow {float} * |
subtract4
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-
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subtracts
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the
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cylinder
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from
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the
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cross
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creating
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a
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hollow
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pipe,
...
by
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selecting
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the
...
2
...
separate
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halves
...
of
...
the
...
cross
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as
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the
...
objects
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to
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be
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subtracted
...
from
...
by
...
using
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p22
...
and
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p23,
...
and
...
selecting
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cylinder7
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as
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the
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object
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to
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be
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subtracted
...
by
...
using
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p24. During the process of subtraction, the two separate pieces are unioned to act as one unit.
subtract4 <-- subtractB(p22,p23,p24)
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p22
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=
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- x
...
- :
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- origin0 - L/4
...
- y
...
- : origin1 - R1
- z : origin2
p23 =
- x : origin0 + L/4
- y : origin1 - R1
- z : origin2
p24 =
- x : origin0
- y : origin1
- z : origin2 + L/2 - R3
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origin{~}1~ \- R1 * z : origin{~}2~ p23 = * x : origin{~}0~ + L/4 * y : origin{~}1~ \- R1 * z : origin{~}2~ p24 = * x : origin{~}0~ * y : origin{~}1~ * z : origin{~}2~ + L/2 - R3 \\ \\ {float:left|border=2px solid black} [!1.bmp|width=330px!|AutoCAD Cross Program] {float} |
viewfront2
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-
...
sets
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the
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workspace
...
so
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that
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the
...
user
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is
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viewing
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the
...
object
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from
...
the
...
front.
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viewfront2
...
<-
...