General Program Information

{float:left|border=2px solid black}
!tank1.JPG!
Northeast Isometric View
{float}

Input Definitions

Inputs needed to call the tank function

tank_origin - a 3 by 1 matrix with x,y,z positions corresponding to the point where the tank will be drawn

tank_dim - a 3 by 1 matrix with x,y,z positions corresponding to the length, width and height dimensions of the tank

x: tank.dim₀ = length
y: tank.dim₁ = width
z: tank.dim₂ = height

thick - the thickness of the wall of the tank

Inputs defined with the tank function

p1=

x : tank.origin₀ - tank.dim₀
y : tank.origin₁ + tank.dim₁
z : tank.origin₂ + tank.dim₂

p2=

x : tank.origin₀ + thick
y : tank.origin₁ - thick
z : tank.origin₂ - thick

p3=

x : tank.origin₀ - tank.dim₀ - thick
y : tank.origin₁ + tank.dim₁ + thick
z : tank.origin₂ + tank.dim₂

win1=

x : tank.origin₀ + thick + zc
y : tank.origin₁ - thick - zc
z : tank.origin₂

win2=

x : tank.origin₀ - tank.dim₀ - zc
y : tank.origin₁ + tank.dim₁ + zc
z : tank.origin₂ + tank.dim₂

Note: zc corresponds to a zoom constant used within Autocad. It is defined in the basics file.

Technical Program Outline

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

{float:left|border=2px solid black}
!tank2.JPG!
{float}

zoom_win- zooms on a window space directly around where the tank is to be drawn

zoom_win <-- zoom_wina(win1,win2)

win1=

x : tank.origin₀ + thick + zc
y : tank.origin₁ - thick - zc
z : tank.origin₂

win2=

x : tank.origin₀ - tank.dim₀ - zc
y : tank.origin₁ + tank.dim₁ + zc

z : tank.origin₂ + tank.dim₂

{float:left|border=2px solid black}
!tank5.JPG!
Top View
!tank3.JPG!
Southwest Isometric View
{float}

box1 - Draws the smaller of the two boxes to create the tank

box1 <-- boxA(tank_origin,p1)

tank_origin : tank_origin

p1=

x : tank.origin₀ - tank.dim₀
y : tank.origin₁ + tank.dim₁
z : tank.origin₂ + tank.dim₂

{float:left|border=2px solid black}
!tank4.JPG!
Front View
!tank6.JPG!
Top View
!tank7.JPG!
Soutwest Isometric View
{float}

box2 - Draws the larger of the two boxes to create the tank

box2 <-- boxA(p2,p3)

p2=

x : tank.origin₀ + thick
y : tank.origin₁ - thick
z : tank.origin₂ - thick

p3=

x : tank.origin₀ - tank.dim₀ - thick
y : tank.origin₁ + tank.dim₁ + thick
z : tank.origin₂ + tank.dim₂

subtract - In order to create the hollow box, the inner box must be subtracted from the outer box. The subtract function selects tank_origin, on the edge of the inner box, to select the inner box as the piece to be subtracted. The subtract function then selects p2, on the edge of the outer box, to select the outer box to subtract from.

subtract <-- subtractD(p2,tank_origin)

p2=

x : tank.origin₀ + thick
y : tank.origin₁ - thick
z : tank.origin₂ - thick

tank_origin : tank_origin

{float:left|border=2px solid black}
!tank1.JPG!
Northeast Isometric
{float}