How to rotate the plot attached(Truncated Pyramid) to make its sides parallel to its Axis.

clear

clc

dh=0.5; %step depth used

a=45; %angle of inclination of the pyrmid

h=30; %Depth of the pyramid

L=100; W=100;

X=L/2; Y=W/2;

R1=sqrt(X^2+Y^2); %diagonal(top part of the Pyramid)

N=h/dh; %Number of loops or contour

m=1;

for n=0:90:360*N %dividing one contour into 360 angles

z(m)=-((dh/360)*n);

R=R1-(((dh/360)*n)/tand(a)); %diagonal at any intermediate depth

y(m)=R*sind(n);

x(m)=R*cosd(n);

m=m+1;

end

plot3(x,y,z,'b') % 3D visualization of helix

Answer 1

[David Goodmanson]

Hi adam,

two lines become

       y(m)=R*sind(n+45);
       x(m)=R*cosd(n+45);

[adam adam]

Thank You very Much!!!