Matlab Cylinder create and make a joint with another cylinder

I have two questions about Cylinder in Matlab

How I can model a cylinder for example with diamater 2 and height 10 than another one with same dimension and make a joint or connect them together. After that if I rotate first cylinder the second one to move automatically.

Answer 1

[Mike Garrity]

It's a bit verbose, but the simplest way is probably nested hgtransform objects . Here's a simple example:

[x,y,z] = cylinder;
g1 = hgtransform;
s1 = surface(2*x,2*y,10*z,'FaceColor','red','Parent',g1);
g2 = hgtransform('Parent',g1,'Matrix',makehgtform('translate',[0 0 10]));
s2 = surface(2*x,2*y,10*z,'FaceColor','blue','Parent',g2);

view(3)
axis equal

Now we can change the Matrix properties of the two hgtransforms to make the cylinders move.

m1 = g1.Matrix;
m2 = g2.Matrix;
for ang=0:.01:pi/3
  g1.Matrix = m1 * makehgtform('xrotate',ang);
  g2.Matrix = m2 * makehgtform('xrotate',ang);
  drawnow
end

The basic idea is that when we change the Matrix of g1, every object parented to it (i.e. s1, g2, & s2) will get rotated. And when we change the Matrix of g2, every object parented to it (i.e. s2) will get rotated. And the transformation that's applied to s2 will be the product of the Matrix properties of g1 and g2.

Does that make sense?