Ready to merge

Gemfile.lock

@@ -29,7 +29,7 @@ GEM
     faraday (1.1.0)
       multipart-post (>= 1.2, < 3)
       ruby2_keywords
-    ffi (1.13.1)
+    ffi (1.14.1)
     forwardable-extended (2.6.0)
     gemoji (3.0.1)
     github-pages (209)
@@ -229,10 +229,6 @@ GEM
     rubyzip (2.3.0)
     safe_yaml (1.0.5)
     sass (3.7.4)
-      sass-listen (~> 4.0.0)
-    sass-listen (4.0.0)
-      rb-fsevent (~> 0.9, >= 0.9.4)
-      rb-inotify (~> 0.9, >= 0.9.7)
     sawyer (0.8.2)
       addressable (>= 2.3.5)
       faraday (> 0.8, < 2.0)
@@ -243,7 +239,7 @@ GEM
     thread_safe (0.3.6)
     typhoeus (1.4.0)
       ethon (>= 0.9.0)
-    tzinfo (1.2.8)
+    tzinfo (1.2.9)
       thread_safe (~> 0.1)
     unf (0.1.4)
       unf_ext

README.md

@@ -2,4 +2,4 @@
 
 Minimal personal web site
 
-View it at <http://www.ianbarnes.me.uk/>
+View it at <https://www.ianbarnes.me.uk/>

_config.yml

@@ -19,69 +19,40 @@
 # in the templates via {{ site.myvariable }}.
 
 title: Ian Barnes
-name: Ian Barnes
 author: Ian Barnes
 email: ianbarnes1963@gmail.com
 
-# author:
-#   name: Ian Barnes
-#   email: ianbarnes1963@gmail.com
-
 description: Software developer
 baseurl: "" # the subpath of your site, e.g. /blog
-url: "http://www.ianbarnes.me.uk" # the base hostname & protocol for your site, e.g. http://example.com
-# github_username: barnes1463
+url: "https://www.ianbarnes.me.uk" # the base hostname & protocol for your site, e.g. https://example.com
 
 # Build settings
 theme: minima
+minima:
+  date_format: "%Y-%m-%d %H:%M:%S %Z"
 plugins:
   - jekyll-feed
 
-# Exclude from processing.
-# The following items will not be processed, by default.
-# Any item listed under the `exclude:` key here will be automatically added to
-# the internal "default list".
-#
-# Excluded items can be processed by explicitly listing the directories or
-# their entries' file path in the `include:` list.
-#
-# exclude:
-#   - .sass-cache/
-#   - .jekyll-cache/
-#   - gemfiles/
-#   - Gemfile
-#   - Gemfile.lock
-#   - node_modules/
-#   - vendor/bundle/
-#   - vendor/cache/
-#   - vendor/gems/
-#   - vendor/ruby/
-
-minima:
-  social_links:
-    facebook: barnes1463
-    linkedin: barnes1463
-    github: barnes1463
-
-  show_excerpts: true
+show_excerpts: true
 
 timezone: Europe/Paris
 
-github_username: barnes1463
+github_username: ian-barnes
 facebook_username: barnes1463
 linkedin_username: barnes1463
 
 # Enable SmartyPants (curly quotes, long dashes, ellipses etc)
-
 markdown: kramdown
 kramdown:
   extensions: ["smart", "footnotes"]
   smart_quotes: lsquo,rsquo,ldquo,rdquo
 
+# Create RSS/Atom feed for blog
 rss: true
 
+# Set navigation links in header
 header_pages:
-  - home.md
+  - index.md
   - cv.md
   - projects.md
   - blog.md

_includes/footer.html

@@ -2,20 +2,18 @@
   <data class="u-url" href="{{ "/" | relative_url }}"></data>
 
   <div class="wrapper">
-
-    <div class="footer-col-wrapper">
-      <div class="footer-col footer-col-1">
-        {%- if site.author -%}
-          {{ site.author | escape }}
+      <p>
+        Copyright &copy; 
+        {% if site.author -%}
+          {{ site.author | escape }},
         {%- else -%}
-          {{ site.title | escape }}
-        {%- endif -%}
-      </div>
-
-      <div class="footer-col footer-col-2">
+          {{ site.title | escape }},
+        {%- endif %}
+        {{ site.time | date: "%Y" }}<br/>
+        Page last rebuilt {{ site.time | date: site.minima.date_format }}
+      <br/>
         {%- include social.html -%}
-      </div>
-    </div>
+      </p>
 
   </div>
 

_includes/head.html

@@ -9,4 +9,9 @@
     {%- include google-analytics.html -%}
   {%- endif -%}
   <script src="https://kit.fontawesome.com/842ddd62e4.js" crossorigin="anonymous"></script>
+  {%- if page.usemathjax -%}
+    <script type="text/javascript" async
+      src="https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-MML-AM_CHTML">
+    </script>
+  {%- endif -%}
 </head>

_layouts/home.html

@@ -22,7 +22,7 @@ <h3>
           </a>
         </h3>
         {%- if site.show_excerpts -%}
-          {{ post.excerpt }}
+          {{ post.excerpt }} <a href="{{ post.url | relative_url }}">More...</a>
         {%- endif -%}
       </li>
       {%- endfor -%}

_posts/2020-12-20-visualisation-of-periodic-surfaces.md

@@ -0,0 +1,36 @@
+---
+layout: post
+title: Visualisation of periodic surfaces
+date: 2020-12-20T01:26:08+01:00
+usemathjax: true
+---
+
+Here's an image I generated while I was writing my [PhD thesis][thesis]. This is
+one repeating unit of the surface $$ \cos X + \cos Y + \cos Z = 0 $$, which is
+similar in many ways to the Schwarz P-surface, a periodic minimal surface.
+
+![The surface cosX + cosY + cosZ = 0](/images/Schwarz-P-Surface.png)
+
+Here's another. This one approximates the Neovius minimal surface, and is
+the solution of the equation
+$$
+3 ( \cos X + \cos Y + \cos Z ) + 4 \cos X \cos Y \cos Z = 0
+$$
+
+![Not quite the Neovius surface](/images/Neovius-Surface.png)
+
+These images were all generated by a Pascal program that divided the repeating
+unit cube into 20x20x20 smaller cubes. For each small cube, it computed the
+function values at the 8 vertices, and if there were any sign changes,
+approximated the positions of the zeros of the function along each edge by
+linear interpolation, then joined these points to form a polygon that
+approximates the part of the surface inside that little cube. This was done in
+order from back to front so that closer polygons overwrote and obscured those
+further away from the viewing point, thus avoiding the need for complex hidden
+surface removal algorithms.
+
+Each image took about an hour to produce on [Macintosh IIci][], a pretty powerful
+desktop workstation back in 1989.
+
+[thesis]: https://openresearch-repository.anu.edu.au/handle/1885/49316
+[Macintosh IIci]: https://en.wikipedia.org/wiki/Macintosh_IIci

_sass/minima/_base.scss

@@ -55,8 +55,10 @@ main {
  * Images
  */
 img {
-  max-width: 100%;
-  vertical-align: middle;
+  max-width: 60%;
+  margin-left: auto;
+  margin-right: auto;
+  display: block;
 }
 
 
@@ -88,6 +90,19 @@ li {
   }
 }
 
+dl {
+  margin-left: 0;
+}
+
+dt {
+  margin-top: $spacing-unit / 2;
+  margin-left: 0;
+}
+
+dd {
+  margin-left: $spacing-unit;
+}
+
 
 
 /**
@@ -217,11 +232,11 @@ pre {
     vertical-align: text-top;
 }
 
-.social-media-list {
-  li + li {
-    padding-top: 5px;
-  }
-}
+// .social-media-list {
+//   li + li {
+//     padding-top: 5px;
+//   }
+// }
 
 
 

_sass/minima/_layout.scss

@@ -101,76 +101,33 @@
 }
 
 
-
 /**
  * Site footer
  */
 .site-footer {
   border-top: 1px solid $grey-color-light;
   padding: $spacing-unit 0;
+  text-align: center;
+  color: $grey-color;
+  @include relative-font-size(0.8);
 }
 
 .footer-heading {
-  @include relative-font-size(1.125);
   margin-bottom: $spacing-unit / 2;
 }
 
 .social-media-list {
   list-style-type: none;
   display: inline;
+  margin: 0;
 }
 
 .social-media-list-item {
   display: inline-block;
   margin-left: 1em;
+  margin-right: 1em;
 }
 
-.footer-col-wrapper {
-  @include relative-font-size(0.9375);
-  color: $grey-color;
-  margin-left: -$spacing-unit / 2;
-  @extend %clearfix;
-}
-
-.footer-col {
-  margin-bottom: $spacing-unit / 2;
-  padding-left: $spacing-unit / 2;
-}
-
-.footer-col-1 {
-  width: -webkit-calc(20% - (#{$spacing-unit} / 2));
-  width:         calc(20% - (#{$spacing-unit} / 2));
-  text-align: left;
-}
-
-.footer-col-2 {
-  width: -webkit-calc(70% - (#{$spacing-unit} / 2));
-  width:         calc(70% - (#{$spacing-unit} / 2));
-  text-align: center;
-}
-
-@include media-query($on-laptop) {
-  .footer-col-1,
-  .footer-col-2 {
-    width: -webkit-calc(50% - (#{$spacing-unit} / 2));
-    width:         calc(50% - (#{$spacing-unit} / 2));
-  }
-
-  .footer-col-3 {
-    width: -webkit-calc(100% - (#{$spacing-unit} / 2));
-    width:         calc(100% - (#{$spacing-unit} / 2));
-  }
-}
-
-@include media-query($on-palm) {
-  .footer-col {
-    float: none;
-    width: -webkit-calc(100% - (#{$spacing-unit} / 2));
-    width:         calc(100% - (#{$spacing-unit} / 2));
-  }
-}
-
-
 
 /**
  * Page content