How can we save the color affected to a point and affect this color to another point (in 3D plot) ?

Hello,

I am currently working with a list of points (3d coordinates). At the beginning, I have this list of coordinates (x list, y list, z list) in a local frame and when I plot it (with plot3k for instance) I have a color assigned to each point, depending on the z-value. Then, I rotate and translate these points and I plot them again, but I want to have the same color on each point than previously (it cannot be done with plot3k directly because the color depends on the new z-value).

I was thinking of saving the color assigned to each points in the local frame (so I will have a list of colors with the same length than the list of coordinates) and then assign again to each points its color after the rotation and translation. But I don't know how to do that exactly.

Could you help me ?

At the end, my functions will look like

 function color_list = getColor(z_list_frame1) 
 %get the color code for each z-value
 end

and

 function my_plot3(x_list_frame2,y_list_frame2,z_list_frame2,color_list)
 %plot each point with the corresponding color
 end

Thank you in advance for your help !

[Image Analyst]

I don't understand your definition of "affected". The normal English definition of affected doesn't fit the context of your sentences. Just what does "affected" mean to you?

[N.]

Hello,

Yes sorry I did not translate well, I think the word "assigned" is better.

Thank you!

Answer 1

[N.]

Hello,

I found the solution I was looking for : with scatter3. I can directly do scatter3(x_list_frame2,y_list_frame2,z_list_frame2,2,z_list_frame1).

Thank you anyway.

Answer 2

[KSSV]

Use delaunay triangulation....to plot what you want.

dt = delaunayTriangulation(x,y) ;

REad about triplot and trisurf.

[N.]

Hello,

Thank you for your response but if I understand well, delaunayTriangulation generates some lines between the points. However, I am looking for how to put the color I want on each point I have. I don't think delaunayTriangulation will help me, but thank you.

[KSSV]

There are two ways to put a color......plot a mesh/ surface and put color or plot points and put color......for the first delaunay triangulation helps., for the second scatter helps.

[N.]

Hello,

Yes, finally scatter was the solution.

Thank you for your help.