Better latex example and a few bug fixes.

Former-commit-id: c08f4f7b31996b8a6672a91d86724ea57869d043

docs/gallery.md

@@ -226,3 +226,18 @@ This file is auto-generated by docs/render_all.sh. DO NOT EDIT.
 
 <br/><hr><br/>
 
+## tut_glue_latex
+
+<details>
+  <summary>View tut_glue_latex.hs</summary>
+  <pre><code class="haskell">
+  {!examples/tut_glue_latex.hs!}
+  </code></pre>
+</details>
+<br/>
+<video width="640" height="360" autoplay loop>
+  <source src="https://github.com/Lemmih/reanimate/raw/master/docs/rendered/tut_glue_latex.mp4">
+</video>
+
+<br/><hr><br/>
+

docs/gen_gallery.sh

@@ -4,7 +4,7 @@ ROOT=`stack path --project-root`
 EXAMPLES='boundingbox colormaps goo latex_basic latex_color latex_draw
           latex_wheel raster sphere blender_default_cube
           tut_glue_svg tut_glue_animate tut_glue_keyframe tut_glue_fourier
-          tut_glue_physics'
+          tut_glue_physics tut_glue_latex'
 
 WIDTH=640
 HEIGHT=$((WIDTH*9/16))

docs/glue_tut.md

@@ -105,6 +105,19 @@ TODO: Show that LaTeX is a provider of SVG graphics. It has the type
       'latex :: Text -> SVG'. Caching is automatic and it plays well with
       other SVG functions (partialSvg, center, etc).
 
+
+<details>
+  <summary>Toggle source code.</summary>
+  <pre><code class="haskell">
+  {!examples/tut_glue_latex.hs!}
+  </code></pre>
+</details>
+<br/>
+<video width="640" height="360" autoplay loop>
+  <source src="../rendered/tut_glue_latex.mp4">
+  <source src="https://github.com/Lemmih/reanimate/raw/master/docs/rendered/tut_glue_latex.mp4">
+</video>
+
 ## Pillar III: potrace
 
 ## Pillar IV: Povray