Merge pull request #54 from vv-monsalve/SC-article

Article added for Sixtyfour Convergence

Sixtyfour/documentation/article-Convergence/ARTICLE.en_us.html

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+<p>
+  Sixtyfour Convergence is the COLRv1 companion of
+  <a href="https://fonts.google.com/specimen/Sixtyfour">Sixtyfour</a> a font
+  inspired by the article Raster CRT Typography by Norbert Landsteiner, and is a
+  rework of some old pixel versions of the Commodore 64.
+</p>
+<p>
+  Due to this project's specificity and the fonts' historical origin, they only
+  support a limited set of glyphs.
+</p>
+
+<p>
+  To contribute, see
+  <a href="https://github.com/jenskutilek/homecomputer-fonts"
+    >github.com/jenskutilek/homecomputer-fonts</a>.
+</p>
+<hr />
+<h3>Homecomputer Fonts</h3>
+<p>
+  These fonts are inspired by the interface fonts of two classic 1980s
+  computers, the Commodore C64 (<a href="https://fonts.google.com/specimen/Sixtyfour">Sixtyfour</a>) 
+  and Amiga (<a href="https://fonts.google.com/specimen/Workbench">Workbench</a>). 
+  When Jens Kutilek adapted them to the variable font technology, 
+  he did not just convert the pixel fonts, but tried to emulate the artifacts of 
+  rendering letters on a CRT screen.
+</p>
+<p>
+  The above fonts include two custom axes: <em>Scanlines</em>, which allows
+  control of the height of the lines and, as a result of this, the amount of
+  vertical space between the lines. And <em>Bleed</em> to change the amount of
+  horizontal bleed of the pixels due to the phosphor latency found in CRT
+  displays.
+</p>
+<img src="sixtyfour-2.png" />
+<h4>Sixtyfour Convergence</h4>
+<p>
+  Sixtyfour Convergence is Simon Cozens's COLRv1 take on Sixtyfour, which introduces 
+  two additional new custom axes:
+  <em>Horizontal Element Alignment</em> and
+  <em>Vertical Element Alignment</em>. These axes allow the control of the position 
+  of three painted layers, reproducing the control of the offset positions of the 
+  red, green, and blue colors common on CRT monitors.
+</p>
+<img src="sixtyfour-1.gif" />