Color hues

This is the first (in the world) SCO that uses Suica and Three.js. The challenge is to find which two of six colors have hues closest to the hue of a randomly generated color.

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Ink tank

The challenge is to construct color by mixing cyan, magenta and yellow ink. This is done by filling a tank with colored liquids.

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Race balls

Several balls are rolling on circular tracks. Pick the two balls – the one with highest and the one with lowest angular speed.

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Euler grill

A polyhedron is spinning on a grill. Calculate the value of the Euler characteristic by counting vertices, edges, faces … or only tunnels.

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Graphical transformations are riding a swing carousel. Spin the carousel so that each transformation matches its matrix.

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Normal pins

Arrange a set of pins on a pincushion so that they are as close to the normal vectors (at the pinpoints) as it is reasonably possible.

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Thimble bits

Knowing at least one bitmask of a zone inside a thimble, set the bitmask of another zone by using the Cohen-Sutherland line splitting algorithm.

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Aerial maze

Controlling a spaceship to fly from one position in space to another using a limited set of commands to manage yaw, pitch and roll.

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Gift-wrapping

Picking points from a cloud of point to define how to gift-wrap the whole cloud. These points must form the vertices of a convex hull.

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Platonic walk

Tracing a path in a doubly-connected edge list onto one of the five Platonic solids, and finding the place where the end of the path is.

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November, 2022