h3. General Program Information

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Free Rotation Used
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h3. Input Definitions

h5. Inputs Needed to Call the Inlet Slope Function

origin - A 3*1 matrix with x,y,z positions corresponding to the point where the inlet slope will be drawn.
Length - length of the slopes, generally the width of the sedimentation tank
Width - width of the slopes, generally the width of the sedimentation tank
l{~}orifice~ - length of the opening that will allow inlet flow
h{~}orifice~ - height of the opening that will allow inlet flow
thick - thickness of the slopes
n - number of orifices and sections, one section contains one orifice
bigslope - slope of the inlet in degrees

h5. Inputs Defined within the Inlet Slope Function

dim = 
*x: Length/2
*y: thick
*z: (Width/2)/cos(bigslope)

box{~}dim~ = origin + dim

orifice{~}origin~ = 
*x: origin{~}0~ + dim{~}0~/2 - 1{~}orifice~/2
*y: origin{~}1~
*z: origin{~}2~

orifice{~}dim~ = 
*x: origin{~}0~ + dim{~}0~/2 + 1{~}orifice~/2
*y: origin{~}1~ + dim{~}1~
*z: origin{~}2~ + h{~}orifice~

mirror{~}point1~ =
*x: origin{~}0~
*y: origin{~}1~

mirror{~}point2~ =
*x: origin{~}0~ + zc
*y: origin{~}1~

nrow = 1

ncol = n

dist =Length/n

win1 =
*x: origin{~}0~ - zc
*y: origin{~}1~ - zc
*z: origin{~}2~ - zc

win2 =
*x: origin{~}0~ + dim{~}0~ - zc
*y: origin{~}1~ + dim{~}1~ - zc
*z: origin{~}2~ + dim{~}2~ - zc

*Note:* zc corresponds to the zoom constant used within AutoCAD, defined by the basics file.

h3. Technical Program Outline

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Top View
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*viewtop* \- sets the workspace so that the user is viewing the top of the object.

viewtop <-- viewtop
*zoom{*}{*}{~}win{~}*\- zooms on a window space directly around where the inlet slope is to be drawn.

zoom{~}win~ <--zoom {~}win~(win1, win2)

win1 =
*x: origin{~}0~ - zc
*y: origin{~}1~ - zc
*z: origin{~}2~ - zc

win2 =
*x: origin{~}0~ + dim{~}0~ - zc
*y: origin{~}1~ + dim{~}1~ - zc
*z: origin{~}2~ + dim{~}2~ - zc
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*box1* - draws a box 
box1 <-- box(origin, box{~}dim~)

origin = origin

box{~}dim~ = origin + dim
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*box2* - draws a box that will be subtracted to become the orifice
box2 <-- box(orifice{~}origin~, orifice{~}dim~)

orifice{~}origin~ = 
*x: origin{~}0~ + dim{~}0~/2 - 1{~}orifice~/2
*y: origin{~}1~
*z: origin{~}2~

orifice{~}dim~ = 
*x: origin{~}0~ + dim{~}0~/2 + 1{~}orifice~/2
*y: origin{~}1~ + dim{~}1~
*z: origin{~}2~ + h{~}orifice~
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Southeast Isometric View, Before subtract1
[!5b.bmp|width=280px!|AutoCAD Sedimentation Tank Inlet Slopes Program]
Southeast Isometric View, After subtract1
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*subtract1* - subtracts box2 to create an orifice, using the origin to select box1 as the object to be subtracted from, and using orifice{~}origin~ to select box2 as the object to be subtracted

subtract1 <-- subtractD(origin, orifice{~}origin~)

origin = origin

orifice{~}origin~ = 
*x: origin{~}0~ + dim{~}0~/2 - 1{~}orifice~/2
*y: origin{~}1~
*z: origin{~}2~
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