Orbiform d4 Dice Set
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From TheDiceLab: BUY NOW: Orbiform d4 Dice
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Orbiform Dice Set: the shape of a standard d4 is the tetrahedron whereas this new dice set are in the form of Meissner tetrahedra, which are in turn based on the Reuleaux triangle. The shape of these dice have constant diameter, no matter their orientation, and will roll like spheres between two planes- note how the acrylic plate stays parallel to the table top.
Five Orbiforms: Volumes of Constant Width
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From Etsy: BUY NOW: set of 5 Solids of Constant Width
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Five Orbiforms: precision 3D printed voumes of constant width. These shapes have constant diameter no matter their orientation and will roll like spheres between two planes- note how the acrylic plate stays parallel to the table as the sphere and other orbiforms roll underneath. The one that resembles a pyramid is the Meissner tetrahedron, which is conjectured to be the orbiform of least volume. A sphere is the orbiform of maximal volume, and the others are based on revolutions of the Reuleaux triangle, pentagon, and heptagon respectively. Skillfully printed in two colors by Brandon of Fractal Forest Makes.
Sphere and other Orbiforms
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From Etsy: BUY NOW: Sphere and Orbiforms
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Sphere and other Orbiforms: pi day special post- volumes of constant width made from solid brass. These shapes have constant diameter no matter their orientation and will roll like spheres between two planes- note how the acrylic plate stays parallel to the table as the sphere and other orbiforms roll underneath. The first orbiform is based on the Reuleaux triangle and the second on a Reuleaux pentagon. Fun pi fact- the perimeter of any shape of constant width is alway equal to the diameter(width) multiplied by pi: P=πd.
Orbiforms
Orbiforms available here:
From Etsy: BUY NOW Orbiforms
Note: this site contains affiliate links for which I may be compensated
Orbiforms: volumes of constant width made from solid steel, brass, and copper- these shapes have constant diameter no matter their orientation and will roll like spheres between two planes- note how the acrylic plate stays parallel to the table as the orbiforms roll underneath. The first set shown are based on the Reuleaux triangle and the second set are based on a Reuleaux pentagon. Featured items from @altdynamic