sugihara

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diff --git a/src/modelli/sugihara-impossible-objects/.gitignore b/src/modelli/sugihara-impossible-objects/.gitignore
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+/document.en.du.xml
+/document.it.du.xml
diff --git a/src/modelli/sugihara-impossible-objects/document.en.rest.txt b/src/modelli/sugihara-impossible-objects/document.en.rest.txt
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+=======================================
+Sugihara Kokichi's "impossible objects"
+=======================================
+:CreationDate: 2019-10-05 12:22:35
+:Id: modelli/sugihara-impossible-objects
+:tags: - japanese
+       - 3dPrint
+
+In September 2019, `Japan House`_ hosted a presentation by `SUGIHARA
+Kokichi`_, inventor of many optical illusions realised as solid
+objects. He had brought some examples, and I took pictures.
+
+An arrow that always points to the right:
+
+.. raw:: html
+
+   <video controls loop playsinline width="320" height="240">
+    <source src="arrow.mp4" type="video/mp4">
+   </video>
+
+This is what it looks like when viewed from above:
+
+.. image:: arrow-from-above-t.jpg
+   :target: arrow-from-above.jpg
+
+Four blue circles, and four heart shapes, but when seen from the other
+side (here, through a plain mirror) it's a blue 4-pointed star and the
+four suits of playing cards:
+
+.. image:: card-suits-plus-pointy-circles-t.jpg
+   :target: card-suits-plus-pointy-circles.jpg
+
+and this is what they look like from the side:
+
+.. image:: card-suits-plus-pointy-circles-from-side-t.jpg
+   :target: card-suits-plus-pointy-circles-from-side.jpg
+
+Six squares, or six circles?
+
+.. image:: square-circles-t.jpg
+   :target: square-circles.jpg
+
+from the side:
+
+.. image:: square-circles-from-side-t.jpg
+   :target: square-circles-from-side.jpg
+
+A ring of circles, and three concentric circles, but from the other
+side it's a ring of squares, and three intersecting circles:
+
+.. image:: braid-and-nested-t.jpg
+   :target: braid-and-nested.jpg
+
+seen from the side:
+
+.. image:: braid-and-nested-from-side-t.jpg
+   :target: braid-and-nested-from-side.jpg
+
+detail of the concentric / intersecting circles from above:
+
+.. image:: nested-from-above-t.jpg
+   :target: nested-from-above.jpg
+
+The four suits of playing cards, but the bottom half is made by the
+reflection of the top half:
+
+.. image:: card-suits-plane-t.jpg
+   :target: card-suits-plane.jpg
+
+Above the mirror, a fish; inside the mirror, its bones:
+
+.. image:: fish-bone-t.jpg
+   :target: fish-bone.jpg
+
+A flower above the mirror, its flowerpot inside:
+
+.. image:: flower-pot-t.jpg
+   :target: flower-pot.jpg
+
+There was also a workshop, in which we built this thing:
+
+.. image:: slides-good-angle-t.jpg
+   :target: slides-good-angle.jpg
+
+If you put marbles on the slides, they roll toward the centre,
+appearing to roll upwards. This is how the same object looks from the
+opposite side:
+
+.. image:: slides-bad-angle-t.jpg
+   :target: slides-bad-angle.jpg
+
+and another side-view:
+
+.. image:: slides-from-side-t.jpg
+   :target: slides-from-side.jpg
+
+.. _`Japan House`: https://www.japanhouselondon.uk/
+.. _`SUGIHARA Kokichi`:
+   http://www.isc.meiji.ac.jp/~kokichis/Welcomee.html
diff --git a/src/modelli/sugihara-impossible-objects/document.it.rest.txt b/src/modelli/sugihara-impossible-objects/document.it.rest.txt
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+=============================================
+Gli "oggetti impossibili" di Sugihara Kokichi
+=============================================
+:CreationDate: 2019-10-05 12:22:35
+:Id: modelli/sugihara-impossible-objects
+:tags: - japanese
+       - 3dPrint
+
+Nel settembre 2019, la `Japan House`_ ha organizzato una presentazione
+di `SUGIHARA Kokichi`_, inventore di molte illusioni ottiche ottenute
+tramite oggetti tridimensionali. Aveva portato alcuni esempi, e io ho
+fatto foto.
+
+Una freccia che punta sempre a destra:
+
+.. raw:: html
+
+   <video controls loop playsinline width="320" height="240">
+    <source src="arrow.mp4" type="video/mp4">
+   </video>
+
+Vista dall'alto, si presenta così:
+
+.. image:: arrow-from-above-t.jpg
+   :target: arrow-from-above.jpg
+
+Quattro cerchi blu, e quattro cuori, ma se si guardano dall'altro lato
+(o attraverso uno specchio piano) diventano una stella a quattro punte
+e i semi delle carte:
+
+.. image:: card-suits-plus-pointy-circles-t.jpg
+   :target: card-suits-plus-pointy-circles.jpg
+
+di lato sono così:
+
+.. image:: card-suits-plus-pointy-circles-from-side-t.jpg
+   :target: card-suits-plus-pointy-circles-from-side.jpg
+
+Sei quadrati, o sei cerchi?
+
+.. image:: square-circles-t.jpg
+   :target: square-circles.jpg
+
+di lato:
+
+.. image:: square-circles-from-side-t.jpg
+   :target: square-circles-from-side.jpg
+
+Un anello di cerchi, e tre cerchi concentrici, ma dall'altro lato si
+vede un anello di quadrati, e tre cerchi intersecati:
+
+.. image:: braid-and-nested-t.jpg
+   :target: braid-and-nested.jpg
+
+visti di lato:
+
+.. image:: braid-and-nested-from-side-t.jpg
+   :target: braid-and-nested-from-side.jpg
+
+dettaglio dei cerchi concentrici / intersecati, dall'altro:
+
+.. image:: nested-from-above-t.jpg
+   :target: nested-from-above.jpg
+
+I semi delle carte, ma la metà inferiore è l'immagine riflessa della
+metà superiore:
+
+.. image:: card-suits-plane-t.jpg
+   :target: card-suits-plane.jpg
+
+Sopra lo specchio, un pesce; dentro lo specchio, la sua lisca:
+
+.. image:: fish-bone-t.jpg
+   :target: fish-bone.jpg
+
+Un fiore sopra lo specchio, il vaso dentro:
+
+.. image:: flower-pot-t.jpg
+   :target: flower-pot.jpg
+
+C'era anche un "workshop", in cui abbiamo costruito questo:
+
+.. image:: slides-good-angle-t.jpg
+   :target: slides-good-angle.jpg
+
+Se si mette una biglia su una delle guide, rotola verso il centro,
+apparentemente verso l'alto. Lo stesso oggetto, visto dalla parte
+opposta, è così:
+
+.. image:: slides-bad-angle-t.jpg
+   :target: slides-bad-angle.jpg
+
+e visto di lato:
+
+.. image:: slides-from-side-t.jpg
+   :target: slides-from-side.jpg
+
+.. _`Japan House`: https://www.japanhouselondon.uk/
+.. _`SUGIHARA Kokichi`:
+   http://www.isc.meiji.ac.jp/~kokichis/Welcomee.html
diff --git a/src/modelli/sugihara-impossible-objects/du2html.xsl b/src/modelli/sugihara-impossible-objects/du2html.xsl
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+../../../templates/du2html.xsl
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