The avatar for @vorth
Scott Vorthmann
Creator of vZome, a free desktop app for modeling Zometool and similar geometries.
Published
Edited
Sep 1, 2019
Importers
10 stars
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Type JavaScript, then Shift-Enter. Ctrl-space for more options. Arrow ↑/↓ to switch modes.

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plus = function( x, y ) {
return x .map( ( xi=0, i ) => xi + ( y[i] || 0 ) )
}
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minus = function( x, y ) {
return x .map( ( xi=0, i ) => xi - ( y[i] || 0 ) );
}
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vplus = function( v1, v2 ) {
return v1 .map( ( vi=[0], i ) => plus( vi, ( v2[i] || [0] ) ) )
}
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vminus = function( v1, v2 ) {
return v1 .map( ( vi=[0], i ) => minus( vi, ( v2[i] || [0] ) ) )
}
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ring = triskaidecagonRing
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ring.embed( epsilon )
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equals( alpha, [,1] )
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equals( beta, [,,1] )
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equals( delta, [,,,,1] )
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equals( triskaidecagonRing.times( triskaidecagonRing.one, triskaidecagonRing.inverses[ 2 ] ), [-1,1,1,-1,-1,1] )
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equals( triskaidecagonRing.times( alpha, triskaidecagonRing.inverses[ 2 ] ), triskaidecagonRing.one )
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equals( triskaidecagonRing.times( epsilon, triskaidecagonRing.inverses[ 6 ] ), triskaidecagonRing.one )
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equals( plus( gamma, plus( delta, epsilon ) ), triskaidecagonRing.times( epsilon, beta ) )
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