General Program Information

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Northwest Isometric
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Input Definitions

Inputs Needed to Call the Sludge Pipe Function

sludgepipeorigin - a 3 by 1 matrix with x,y,z positions corresponding to the point where the sludge pipe will be drawn
NDsludge - the nominal diameter of the sludge waste pipe - from this we can find the actual inner diameter and actual outer diameter of the pipe based on the schedule of pipe being used.
tanklength - the length of the tank
orificerad - the radius of the orifice hole
orificedist - the distance between successive orifices
ENPipeSpec - an enumerated pipe schedule which specifies a number which corresponds to a pipe schedule that states the amount of water pressure the pipe can handle before it fails. The pipe schedule affects the inner and outer diameter of the pipe.

Inputs Found from Pipe Database Function

sludepipeinr - the radius of the inner cylinder defined by innerD(NDsludge,ENPipeSpec)/2
sludgepipeoutr - the radius of the outer cylinder defined by outerradius(NDsludge)

Inputs Defined Within the Sludge Pipe Function

p1 =

p2 =

p3 =

p4 =

p5 =

p6 =

p7 =

ND = NDsludge

R1 = sludgepipeoutr

R2 = sludgepipeinr

R3 = orificerad

L = tanklength

n1 = floor( tanklength / orificedist )

n2 = 1

d1 = orificedist

win1 =

win2 =

EN = ENPipeSpec

Note: zc corresponds to the zoom constant used within AutoCAD and created in the basics file that is referenced by the pipe program.

Technical Program Outline

Note: All coordinates are referenced in top view in the program unless otherwise specified

viewtop - shows an object in top view in AutoCAD.
viewtop <-- viewtop

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Northwest Isometric View
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pipe1 - using the pipe function draws a pipe (from the pipe program) with no zoom
pipe1 <-- pipe(p1,ND,L,EN)

p1 =

ND = NDsludge

L = tanklength

EN = ENPipeSpec 

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zoomwin - zooms on a window space
zoomwin <-- zoomwin(win1,win2)

win1 =

win2 =

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cylinder3 - is to draw a cylinder for orifice purpose
cylinder3 <-- cylinderD(p2,R3,p3)

p2 =

R3 = radhole

p3 =

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viewrightside - change view to viewrightside
viewrightside <-- viewrightside 

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array1 - draw starting at point p4, n1 -- as many rows as the tank length/orifice dist, n2 - 1 and provide orifice distance as the next draw point for the cylinder
array1 <-- array(p4,n1,n2,-d1)

p4 =

n1 = floor( tanklength / orificedist )

n2 = 1

d1 = orificedist 

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Northwest Isometric View
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subtract2 - subtract unneeded portion of the cylinders, using p5 to select the pipe as the object to be subtracted from, and using p6 and p7 to select the cylinder as the region to be subtracted
subtract2 <-- subtractH(p5,p6,p7)

p5 =

p6 =

p7 =