Rotating a point cloud fails

Hello,

I'm attempting a rotate a point cloud that is defined in the attachment 'point_cloud.mat'. The points are 32 points equidistant on the surface of a unit sphere.

load('point_cloud.mat')
scatter3(V1(:,1),V1(:,2),V1(:,3))

% I'm attemping to rotate the point cloud around the three elementary rotation axes simultaneously:

for x=1:360
    
    Rx = [1 0 0; 0 cosd(x) -sind(x); 0 sind(x) cosd(x)];
    Ry = [cosd(x) 0 sind(x); 0 1 0; -sind(x) 0 cosd(x)];
    Rz = [cosd(x) -sind(x) 0; sind(x) cosd(x) 0; 0 0 1];
    
    rotation_mat = Rx*Ry*Rz; 
    V = rotation_mat*[V1(:,1) V1(:,2) V1(:,2)]';            % rotate data
    
    h = scatter3(V(1,:)',V(2,:)',V(3,:)','g');    
    pause(0.05)
    hold on
    delete(h)           
end

However, it looks the projection of the 3d point cloud on a 2d surface is being rotated not the point cloud.. ANy ideas?

Answer 1

[Bruno Luong]

The last index of this line should be 3

V = rotation_mat*[V1(:,1) V1(:,2) V1(:,2)]'

[Pseudoscientist]

i must be blind...