Nonrectangular grid between two lines
2 views (last 30 days)
Show older comments
Hey guys, this might be a simple problem but I'm going crazy here:
Assume you have two lines or direction vectors r,s from the point p (e.g. the origin):
p = [0 0 0]; r = [2 1 1]; s = [.2 0.1 .5];
Interpreting these vectors span a plane in R^3 (red vector is the normal vector):
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/149898/image.png)
This works fine with a normal meshgrid. What I really want is to create a grid "between" the r and s axis, and not a rectangular grid between the x and y values.
I can plot points along the vectors, so I have the coordinate for each star or diamond. Let's call them a and b (which are 3d vectors):
rn = r/norm(r); sn = s/norm(s);
a = linspace(p,p+rn,10);
b = linspace(p,p+sn,10);
plot3(a(1,:),a(2,:),a(3,:),'*')
plot3(b(1,:),b(2,:),b(3,:),'d')
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/149899/image.png)
How can I define a grid between a and b?
PS, this is only for visualization, I know that planes have an infinity spread ;)
Thank you very much! Jan
2 Comments
Matt J
on 7 May 2015
I don't really see how you got this to work
a = linspace(p,p+rn,10);
You have vector input arguments, but All input arguments of linspace are supposed to be scalars according to the documentation.
See Also
Categories
Find more on Surface and Mesh Plots in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!