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h3. General Program |
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Input Definitions
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Information {float:left|border=2px solid black} [!1b.bmp|width=480px!|AutoCAD Cross Program] [!1.bmp|width=300px!|AutoCAD Cross Program] Southwest Isometric View {float} \\ \\ 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. h3. Input Definitions h5. Inputs Needed to Call the Cross Function origin - a 3*1 matrix with x,y,z positions corresponding to the point where the tee will be drawn. |
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Inputs Defined within the Cross Function
p1 =
- x : origin0
- y : origin1
- z : origin2
p2 =
- x : origin0
- y : origin1
- z : origin2 + L/2
p3 =
- x : origin0 + L/2
- y : origin1
- z : origin2 + L/2
p4 =
- x : origin0 - R1
- y : origin1
- z : origin2
p5 =
- x : origin0 + L/2
- y : origin1 + R1
- z : origin2 + L/2
p6 =
- x : origin0 - R2
- y : origin1
- z : origin2
p7 =
- x : origin0 - R3
- y : origin1
- z : origin2
p8 =
- x : origin0 - R1
- y : origin1
- z : origin2 - H
p9 =
- x : origin0
- y : origin1 - H
- z : -origin1 - R3
p10 =
- x : origin0
- y : origin2 + L/2
p11 =
- x : origin0 + zc
- y : origin2 + L/2 - zc
p12 =
- x : origin0 + zc
- y : origin2 + L/2
p13 =
- x : origin0
- y : origin2 + L + H
- z : -origin1
p14 =
- x : origin0
- y : origin2
- z : -origin1
p15 =
- x : origin0
- y : origin2 - H
- z : -origin1
p16 =
- x : origin0
- y : origin2 + R2
- z : -origin1
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
p25 =
- x : origin0 + L/2 + H
- y : origin2 + L/2
- z : -origin1 + R3
p26 =
- x : origin0
- y : origin2
- z : -origin1
p27 =
- x : origin0
- y : origin2 + L
p28 =
- x : origin0 + L/2 + H
- y : origin2 + L/2
- z : -origin1
p29 =
- x : origin0
- y : origin2 + L + H
- z : origin1
p30 =
- x : origin0 - L/2 - H
- y : origin2 + L/2
- z : -origin1
win1 =
- x : origin0 - (L/2 + H)
- y : origin1 - R3
- z : origin2
win2 =
- x : origin0 + (L/2 + H)
- y : origin1 + R3
- z : origin2
win3 =
- x : origin0 - R3 - zc
- y : origin2 - H - zc
- z : -origin1
win4 =
- x : origin0 + L/2 + H + zc
- y : origin2 + H + L + zc
- z : -origin1
Technical Program Outline
The Cross program is built on the Tee Program.
mirror3 - mirrors the tee around the centerline of the main pipe.
cylinder7 - creates a cylinder within the cross.
subtract4 - subtracts the cylinder from the cross creating a hollow pipe.
viewfront2 - sets the workspace so that the user is viewing the object from the front.
mirror4 -
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ND - The nominal diameter of the pipe. This value along with the pipe schedule is used to determine other actual dimensions of the elbow
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 Database
origin-A 3*1 matrix with x,y,z positions corresponding to the point where the tee will be drawn.
ND-The nominal diameter of the pipe. This value along with the pipe schedule is used to determine other actual dimensions of the tee.
outerradius(ND)\-
innerD(ND,EN)/2\-
ConRadius(ND)\-
ShortTeeLength(ND)*2\-
SocketDepth(ND)\-
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~
p2 =
* x : origin{~}0~
* y : origin{~}1~
* z : origin{~}2~ + L/2
p3 =
* x : origin{~}0~ + innerD(ND,EN)/2
* y : origin{~}1~
* z : origin{~}2~ + L/2
p4 =
* x : origin{~}0~ \- R1
* y : origin{~}1~
* z : origin{~}2~
p5 =
* x : origin{~}0~ + L/2
* y : origin{~}1~ + R1
* z : origin{~}2~ + L/2
p7 =
* x : origin{~}0~ \- R3
* y : origin{~}1~
* z : origin{~}2~
p8 =
* x : origin{~}0~ \- R1
* y : origin{~}1~
* z : origin{~}2~ \
p9 =
* x : origin{~}0~
* y : origin{~}1~ \- H
* z : \-origin{~}1~ \- R3
p10 =
* x : origin{~}0~
* y : origin{~}2~ + L/2
p11 =
* x : origin{~}0~ + zc
* y : origin{~}2~ + L/2 - zc
p12 =
* x : origin{~}0~ + zc
* y : origin{~}2~ + L/2
p13 =
* x : origin{~}0~
* y : origin{~}2~ + L + H
* z : \-origin{~}1~
p14 =
* x : origin{~}0~ + L/2 + H
* y : origin{~}2~ + L/2
* z : \-origin{~}1~
p15 =
* x : origin{~}0~
* y : origin{~}2~ \- H
* z : \-origin{~}1~
p16 =
* x : origin{~}0~
* y : origin{~}2~ + R2
* z : \-origin{~}1~
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=480px!|AutoCAD Cross Program]
Before mirror3
[!2c.bmp|width=480px!|AutoCAD Cross Program]
After mirror3
{float}
*mirror3* - mirrors the tee around the centerline of the main pipe, using p17 to select the tee, then reflecting it over a mirror line created using p18 and p19 to give the slope and direction of the mirror line.
mirror3 <-- mirrorA(p17,p18,p19)
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
\\
\\
{float:left|border=2px solid black}
[!3.bmp|width=480px!|AutoCAD Cross Program]
{float}
*cylinder7* - creates a cylinder of radius R2 within the cross.
cylinder7 <-- cylinderB(p20,R2,p21)
p20 =
* x : origin{~}0~ \- L/2
* y : origin{~}1~
* z : origin{~}2~ + L/2
R2 - the outer radius of the main pipe.
p21 =
* x : origin{~}0~ + L/2
* y : origin{~}1~
* z : origin{~}2~ + L/2
\\
\\
{float:left|border=2px solid black}
[!4a.bmp|width=480px!|AutoCAD Cross Program]
[!4b.bmp|width=480px!|AutoCAD Cross Program]
Free Rotation used to show the cross is now hollow
{float}
*subtract4* - subtracts the cylinder from the cross creating a hollow pipe, by selecting the 2 separate halves of the cross as the objects to be subtracted from by using p22 and p23, and selecting cylinder7 as the object to be subtracted by using p24.
subtract4 <-- subtractB(p22,p23,p24)
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
\\
\\
{float:left|border=2px solid black}
[!1.bmp|width=480px!|AutoCAD Cross Program]
{float}
viewfront2 - sets the workspace so that the user is viewing the object from the front.
viewfront2 <-- concat("_-view",sp,"o",sp,"f")
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