Search All of the Math Forum:

Views expressed in these public forums are not endorsed by NCTM or The Math Forum.

Notice: We are no longer accepting new posts, but the forums will continue to be readable.

Topic: coordinates of a 3D line
Replies: 2   Last Post: Dec 2, 2012 4:39 PM

 Messages: [ Previous | Next ]
 Javier Posts: 61 Registered: 4/26/11
Re: coordinates of a 3D line
Posted: Dec 2, 2012 10:44 AM

"Javier " <javsanzperez@gmail.com> wrote in message <k9frj8\$dsu\$1@newscl01ah.mathworks.com>...
> Hi,
>
> I'm starting with 3D and I want to plot a line in 3D which start in one point P1 and finishes in another P2, and obtain all the coordinates points of the line with a resolution R. Could I do something similar to the following:
> I don?t know the value for t:
> P1=[-1 5 2];
> P2=[0 0 0]
> resol = 0.1;
> x0 = P1(1);
> y0 = P1(2);
> z0 = P1(3);
> t=-1:resol:1
> dx = P2(:,1)-P1(:,1)
> dy = P2(:,2)-P1(:,2)
> dz = P2(:,3)-P1(:,3)
>
> x = x0 + t*dx
> y = y0 + t*dy
> z = z0 + t*dz
>
> plot3(x,y,z,'b')
> Better said, I need a function to define a segment of line knowing a point, the slop and the distance.
> Thanks very much

Date Subject Author
12/2/12 Javier
12/2/12 Javier
12/2/12 Derek Goring