AutoCAD Cross Program

General Program Information

Input Definitions

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.
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.

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.

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. 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 : origin₀ - (L/2 + H)
• y : origin₁ - R3
• z : origin₂

win2 =

• x : origin₀ + (L/2 + H)
• y : origin₁ + R3
• z : origin₂

EN = The enumerated pipe schedule type. Each schedule of pipe is represented by a specific number within our code.

Technical Program Outline

The Cross program is built on the Tee Program.

Resuming after bigunion1:

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 : origin₀
• y : origin₂ + R2
• z : origin₁

p18 =

• x : origin₀
• y : origin₂

p19 =

• x : origin₀
• y : origin₂ + zc

cylinder7 - creates a cylinder of radius R2 within the cross.

cylinder7 <-- cylinderB(p20,R2,p21)
p20 =

• x : origin₀ - L/2
• y : origin₁
• z : origin₂ + L/2
  R2 - the outer radius of the main pipe.
  p21 =
• x : origin₀ + L/2
• y : origin₁
• z : origin₂ + L/2

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 : 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

viewfront2 - sets the workspace so that the user is viewing the object from the front.

viewfront2 <-- concat("_-view",sp,"o",sp,"f")