From http://www.jwz.org/xscreensaver/xscreensaver-5.35.tar.gz

[xscreensaver] / hacks / config / polytopes.xml

diff --git a/hacks/config/polytopes.xml b/hacks/config/polytopes.xml
index 84af6e38c60730c7250111716192f30cc6ff8b80..1e6f1f36150db719127dd430adf1a1ac0bc2f23c 100644 (file)
--- a/hacks/config/polytopes.xml
+++ b/hacks/config/polytopes.xml
@@ -4,6 +4,8 @@
 
  <command arg="-root"/>
 
+  <video href="https://www.youtube.com/watch?v=MKZQ5Q7QINM"/>
+
  <hgroup>
   <vgroup>
    <select id="display-mode">
@@ -94,17 +96,16 @@
   <xscreensaver-updater />
 
  <_description>
-
-This shows one of the six regular 4D polytopes rotating in 4D.
+The six regular 4D polytopes rotating in 4D.
 
 Inspired by H.S.M Coxeter's book "Regular Polytopes", 3rd Edition,
 Dover Publications, Inc., 1973, and Thomas Banchoff's book "Beyond the
 Third Dimension: Geometry, Computer Graphics, and Higher Dimensions",
 Scientific American Library, 1990.
 
-http://en.wikipedia.org/wiki/Hypercube
-http://en.wikipedia.org/wiki/Tesseract
-http://en.wikipedia.org/wiki/Regular_polytope
+https://en.wikipedia.org/wiki/Hypercube
+https://en.wikipedia.org/wiki/Tesseract
+https://en.wikipedia.org/wiki/Regular_polytope
 
 Written by Carsten Steger; 2003.
   </_description>