How to create line connects between two semi circles?

% Define parameters of the arc.
xCenter = 2;
yCenter = 1; 
radius = -5;
% Define the angle theta as going from 30 to 150 degrees in 100 steps.
theta = linspace(10, 170, 100);
% Define x and y using "Degrees" version of sin and cos.
x = radius * cosd(theta) + xCenter; 
y = radius * sind(theta) + yCenter; 
% Now plot the points.
plot(x, y, 'b-', 'LineWidth', 2); 
axis equal; 
grid on;

I figured out how to make the down semi circle and the upper one but I couldn't know how to make the connecting line of the two semi circles to get the tooth profile as I am doing try and error to make development of arc tooth

[John D'Errico]

A little confusing, as there are actually 4 semicircles I see in that drawing. And in fact, they are not even semi-circles, but just partial circular arcs as you are creating them.

I THINK what you are asking is how to choose the parameters of those 4 semi-circles to take on the shape you want, and then to draw a line that connects the end points of those circle fragments to connect smoothly between them. But that is not at all clear from your question, and I probably have it wrong.

[sila]

Yes that what i meant i want to write a code that have a relation of them to be able to choose the best 4 arcs and the line connects them also

Answer 1

[Image Analyst]

You can use line to draw a line below the lower semi circle.

Answer 2

[Star Strider]

I finally got this to work yesterday —

If you’re interested, I’ll post my code

.