<story><title>Flow Field Pathfinding</title><url>https://www.redblobgames.com/blog/2024-04-27-flow-field-pathfinding/</url></story><parent_chain></parent_chain><comment><author>amitp</author><text>Author here. A surprise seeing this on HN!&lt;p&gt;The context: I&amp;#x27;m writing my own blog software for various reasons [1], including my desire to post less to social media. As much as possible I&amp;#x27;m trying to reuse the build system for the rest of the site, including the template. I have worked on and off on this for the past two months and I expect to keep adding features for another month or two. I&amp;#x27;m currently adding categories not only for the blog but to the whole site. After that I&amp;#x27;ll work on archives by month. And I want to import the 21 years of old blog content [2] which is stored on blogger.com, and put it on the new blog, which is just a folder [3] on my existing site.&lt;p&gt;I&amp;#x27;m writing some blog posts to test out the workflow (integrating into emacs, my build script, an internal status page) and also various content types (images, video, source code, figures, links). Each time I post I find some more things to tweak.&lt;p&gt;This post to HN made me realize that it&amp;#x27;s not &lt;i&gt;labeled&lt;/i&gt; as a blog post. Oops. I guess that&amp;#x27;s one of the downsides of reusing the exact same template! So another tweak coming…&lt;p&gt;[1] &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.redblobgames.com&amp;#x2F;blog&amp;#x2F;2024-03-08-new-blog&amp;#x2F;&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.redblobgames.com&amp;#x2F;blog&amp;#x2F;2024-03-08-new-blog&amp;#x2F;&lt;/a&gt;&lt;p&gt;[2] &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;simblob.blogspot.com&amp;#x2F;&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;simblob.blogspot.com&amp;#x2F;&lt;/a&gt;&lt;p&gt;[3] &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.redblobgames.com&amp;#x2F;blog&amp;#x2F;&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.redblobgames.com&amp;#x2F;blog&amp;#x2F;&lt;/a&gt;</text></comment>
<story><title>Flow Field Pathfinding</title><url>https://www.redblobgames.com/blog/2024-04-27-flow-field-pathfinding/</url></story><parent_chain></parent_chain><comment><author>kevindamm</author><text>Ah, redblobgames!  I remember their hexagonal coordinate system post from many years ago:&lt;p&gt;&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.redblobgames.com&amp;#x2F;grids&amp;#x2F;hexagons&amp;#x2F;&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.redblobgames.com&amp;#x2F;grids&amp;#x2F;hexagons&amp;#x2F;&lt;/a&gt;&lt;p&gt;An excellent example of their more interactive posts and great for those interested in hex-grid rendering and navigating.&lt;p&gt;edit: wow, over 10 years ago and  the content has been updated but the look and feel is much as I remember it.  This was before reactive systems took over the web, too, so the &amp;#x27;toggle selection here, see updates everywhere&amp;#x27; was quite notable for the time.&lt;p&gt;On the actual topic of the post.. I think flow fields easily get overshadowed by waypoints and other hierarchical approaches.  Or, folded into the heuristic function for A*.</text></comment>