Page History

General Program Information

Input Definitions

Inputs Needed to Call the Channel Function

Inputs Defined within the Channel Function

{float:left|border=2px solid black}
[!lamina label.bmp|width=200px!|AutoCAD Channel Program]
Top View
{float}

{float:left|border=2px solid black}
[!individual lamina.bmp|width=550px!|AutoCAD Channel Program]
Front View
{float}

origin - is a 3*1 matrix with x,y,z positions corresponding to the point where the first lamella will be drawn.

amp - specifies the amplitude of the lamina

w - specifies the width of an individual lamina

l - specifies the length of an individual lamina

t - specifies the thickness of an individual lamina

periods - specifies the period of one curve of the lamina.

angle - specifies the angle of the lamina relative to the floor of the tank.

num_baffles - specifies the number baffles in the tank

num_bafflescol -

xspace -

yspace -

Technical Program Outline

lamina₀ - The zoom_winA function creates a close-up view based on two points to specify the window size.

p1:

• x: origin₀ - w - zc
• y: origin₁
• z: origin₂

p2:

• x: origin₀ + w + zc
• y: origin₁ + 1 + zc
• z: origin₂

for loop - a for loop is created for the range from i = 0 to i = (periods*4).

lamina_last - Every time the program runs through the for loop another sine wave is drawn.

lamina_last:

• x: origin₀ + sin(πi/2)*amp
• y: origin₁ + i*(x/(periods*4)
• z: origin₂

lamina_i+1 - Uses the 'point' function to turn the 3*1 matrix lamina_last into a text format that AutoCad can read.

lamina_i+2 - Uses the 'concat' function create a character string out of a space and the point (origin - zc_point).

lamina_i+3 - Uses the 'point' function to turn the 3*1 matrix (lamina_last + zc_point) into a text format that AutoCad can read.

lamina_i+4 - Enters the command "offset" into AutoCad. The offset function is used to move the selected object a specified distance from its original location.

lamina_i+5 - The command 'stringit' turns the the variable "t" into a dimensionless number and cuts the number off after 5 decimal points. t represents the distance that the selected object is to be offset.

lamina_i+6 - Uses the 'point' function to turn the 3*1 matrix 'origin' into a text format that AutoCad can read.

lamina_i+7 - Uses the 'point' function to turn the following 3*1 matrix into a text format that AutoCad can read.

• x: origin₀ + t
• y: origin₁
• z: origin₂

line₀ - Uses the 'concat' function to create a character string out of the point 'origin' a space and the point converted in line lamina_i+7.

line₁ - Uses the 'concat' function to creat a character string out of the point 'lamina_last' a space and the point described below into Autocad.

• x: lamina_last0 + t
• y: lamina_last1
• z: lamina_last2

lamina_i+8 - Uses the 'concat' function to create a character string out of a space, the AutoCad command "line," a space, the character string created in line₀, and a space. The purpose of the character string is to create a line in AutoCad between the two points specified in line₀.

lamina_i+9 - Uses the 'concat' function to create a character string out of a the AutoCad command "line," a space, the character string created in line₁ and a space. The purpose of the character string is to create a line in AutoCad between the two points specified in line₁.

lamina_i+10 - Uses the 'concat' function to create a character string out of the AutoCad command "z e region w," a space, a point described below, a space, the second point described below and a space. The purpose of the character string is to create a region based on the two points specified.

first point:

• x: origin₀ - amp
• y: origin₁
• z: origin₂

second point:

• x: lamina_last0 + t + amp
• y: lamina_last1
• z: lamina_last2

z: zoom
e: extents
region: creates a region based on two specified points.
w: specifies corners for the window in which the region is to be created.

lamina_i+11 - Uses the concat function to create a character string out of the AutoCad command extrude, a space, the point 'origin,' a space, a space, the variable 'l,' a space and the "0."

lamina_i+12 - Uses the concat function to create a character string out of the AutoCad command rotate3d, a space, the point 'origin,' a space, a space, the command "y," a space and a num2str (-(90-angle/deg)) if the angle is not 90 degrees.

lamina_i+13 - Uses the concat functino to create a character string out of the AutoCad command array, a space, the point 'origin,' a space, a space, the command "R," a space, num2str(num_bafflecols, a space,num2str_baffles and a space.

lamina_i+14 - Together lamina_i+14 and lamina_i+15 for an if statement. Lamina_i+14 uses the concat function to create a character string that enters the dimensionless number "yspace" if num_bafflecols is less that 1.

lamina_i+15 - Enters "" into the command line if the condition in lamina_i+14 is not forfilled.