Re: point projection on polyline

[Juan Pablo Carbajal]

On Wed, Feb 3, 2016 at 2:43 PM, Juan Pablo Carbajal <address@hidden> wrote:

On Wed, Feb 3, 2016 at 12:25 PM, rcharan51 <address@hidden> wrote:

I have finally succeeded to hash out the unwanted area in the graph and
decreased the elapsed time. Thank you for the idea.

Also I modified the existing distancePointPolyline function to calculate
both orthogonal distance and projection without for loops !!  (code:
https://bpaste.net/show/4b7886b58442). I have tested it, and it only works
for open polylines. For closed polylines it is not giving correct
projections. I am not able to figure where the problem is. Please go through
the code given above and let me know of my mistakes.



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Thanks a lot!

I am happy to hear you succeeded. If you think you can provide a 2D hashing function, we could add it to geometry.

I will check the code and update the package. I will add your copyright to the function.

Hi, I just reviewed your code.

1. You do not need ot use ".-" or ".+" subtraction and addition are always element-wise.

2. You can do inf (n,m) instead of inf*ones(n,m). I know David had it like that, but when I see this I correct it.

3. Do not use varargin or varargout unless you need them. David also the habit of using them by default, but I correct it when I see it.

4. For closed polys you need to add a point at the end. Check how projPointOnPolyline.m does it.

I am now profiling your code to see if there is an advantage.