Re: Geometry pointOnLine Fails

[Juan Pablo Carbajal]

On Wed, May 4, 2016 at 12:12 AM, Thomas D. Dean <address@hidden> wrote:
> I have a failure with pointOnLine, using the line and point option.
>
> The document allows the arguments to be a line and a point or a line and a
> distance.
>
> The function definition only seems to handle the line and distance option.
>
> I think the definition should be something like
>
> function point = pointOnLine(lin, pos)
>   ang = lineAngle(lin);
>   if  size(pos) == [1,2]
>     point = [lin(:,1)+pos(1,1).*cos(ang), lin(:,2)+pos(1,2).*sin(ang)];
>   elseif size(pos) == [1,1]
>     point = [lin(:,1) + pos .* cos(ang), lin(:,2) + pos .* sin(ang)];
>   else
>     error('pointOnLine(line,d), arg d must be a point or a scalar');
>   endif
> endfunction;
>
> Tom Dean
>
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Tom,

Where do you got that it acepts a point? This is the text string
-- Function File: POINT = pointOnLine (LINE, D)
     Create a point on a line at a given position on the line.

     Creates the point belonging to the line LINE, and located at the
     distance D from the line origin.  LINE has the form [x0 y0 dx dy].
     LINE and D should have the same number N of rows.  The result will
     have N rows and 2 column (x and y positions).

NO option to pass a point, only a distance.