I have multiple points that I need to calculate the angle between two points that respects to x-direction as shown in the image. The angle is measured from positive x direction (counter clockwise).
For 2D case as shown in the image:
for j=1:N-1
for k=(j+1):N
sepx=X(1,k)-X(1,j);
sepy=Y(1,k)-Y(1,j);
r = sqrt(sepx^2+sepy^2);
theta=mod(atan2d(sepy,sepx),360);
end
end
For 3D case, I only changed this part
sepx=X(1,k)-X(1,j);
sepy=Y(1,k)-Y(1,j);
sepz=Z(1,k)-Z(1,j);
r = sqrt(sepx^2+sepy^2 +sepz^2);
theta=mod(atan2d(sepy,sepx),360);
I am really bad at 3D in term of visualization to project thing. Is that correct to find angle of two points in 3D that is measured from positive x-direction (counter clockwise). The counter clockwise for an observer looking from above on the xy-plane. Please helps. Thanks.
