Rotate 3d mesh by using videowriter (change camera angle)

Purpose:

While playing an .avi movie, manually change the camera angle (have the option to rotate 3D).

Question:

How can I add an option to rotate the mesh during playing an .avi movie?

The code:

I created a 3D mesh.

All vertices have their own signal value. vq_list is a matrix that contains all signal values for different time steps.

%% Create first figure
p = patch('Faces',FV_refined.faces,'Vertices',FV_refined.vertices,'FaceVertexCData', vq_list(:,1),'FaceColor','interp'); 

After creating the first figure with the signal values for the first time point, I do this for all time points. So that I have a video in time that shows how all signal values change over time.

%% Create figures with data for all time steps
for i = 1:length(vq_list)
    p.FaceVertexCData = vq_list(:,i);
    pause(1);   
    axis vis3d
    rotate3d on
    %view(90,1)                     Movie2.avi
    caxis([-100 100])
    
    frame(i) = getframe(gcf);                       
end

Each figure is a frame (which contains data in 3 dimensions) that I can later use to write my video by using VideoWriter:

v = VideoWriter('Movie.avi');
open(v) 
writeVideo(v, frame);
close(v)

By using implay I can play the video:

implay('Movie.avi')

The problem:

The video is in 2D and I cannot rotate it. The first figure does have the option to rotate it and all separate frames have this option too. But when making a video of it, this option is not shown in Movie Player.

Answer 1

[Ameer Hamza]

I am not sure if such an interaction is even possible with .avi files (or other commonly known video container formats). getframe() returns a rasterized image, which is just pixels and does not contain any information about 3D structure of your scene. If you want such interaction, then you need to use a 3D CG software package, such as Blender, but even in those cases, the interaction is only possible inside the software; the exported video does not have such capability.

[Justina Ghebryal]

Thanks for your reply, I will look into these type of solutions