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Home›Designer Reviews›Tandis review: The ultimate geometry-based puzzle game

Tandis review: The ultimate geometry-based puzzle game

By Macie Vincent
April 22, 2022
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While can apply mathematical functions to their shapes and enjoy immediate shape-shifting results, all used to solve the game’s tricky and unique puzzles.”/>

Enlarge / By moving simple shapes from one grid to another, While players can apply mathematical functions to their shapes and enjoy immediate shape-shifting results, all used to solve the game’s tricky and unique puzzles.

Mahdi Bahrami

The puzzle game genre of “creating shapes from formulas” is currently led by a single designer. Five years after his last sensational hit in the genre, Iranian-born game creator Mahdi Bahrami is back with an even more awe-inspiring – and sometimes hair-pulling – masterpiece.

While, out this week on Steam and DRM-free direct purchase for $15 (temporarily on sale for $13.49), is arguably the coolest execution of high-level math I’ve ever seen in a PC game. . Even better, his challenge is disguised as a handyman. Hand this to any budding young mathematician and watch them get hooked on what is ultimately a brilliant gem of edutainment in disguise.

Axes and allies

The beauty of While comes from the way it turns formula manipulation of the X, Y, and Z axes into a game mechanic. Typical teaching about math formulas involves plotting the results of the solutions on a 2D grid to see what shapes they generate. That’s good enough, although it requires the mathematical calculation of a formula itself. But what if you could do this stuff much faster, and in 3D, by dragging shapes across a series of easily understandable grids, then watching them morph into fantastical new shapes in response?

The beginning of the first puzzle of <em>While</em>.” src=”https://cdn.arstechnica.net/wp-content/uploads/2022/04/20220422114825_1-640×360.jpg” width=”640″ height=”360″ srcset=”https://cdn. arstechnica.net/wp-content/uploads/2022/04/20220422114825_1-1280×720.jpg 2x”/><figcaption class=
Enlarge / The start of the first While puzzle.

In each While puzzle, players are given a single geometric shape (sometimes with full 3D properties, sometimes as a flat 2D polygon), and then see the puzzle solution, which is a different geometric shape. Let’s start with a simple example. In the first puzzle of the game, your starting shape (which you can take) is a quarter of the volume of the “solution” block (which you cannot touch).

The right grid is twice the length and width of the left grid.  Putting a coin on one generates a new coin on the other which is proportional.
Enlarge / The right grid is twice the length and width of the left grid. Putting a coin on one generates a new coin on the other which is proportional.

Pick up the shape with your mouse, then place it on a grid of black and white squares. To the right of it, a new shape appears on a grid of bigger black and white squares, and the resulting shape is twice as large on all axes, which coincidentally is the size of the black and white squares on the right side. (Mathematically, it’s a simple multiplication of the values ​​of all the axes.) You can choose either shape, and at this point the larger one fits the solution shape perfectly. Pick it up and move it to a podium next to the solution and While will analyze your submission to confirm that its size, shape and curves are close enough.

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The simple rectangle block on the left becomes a wavy rectangle block on the right.
Enlarge / The simple rectangle block on the left becomes a wavy rectangle block on the right.

The next puzzle indicates how hairy While will eventually become. Its left grid is made up of black and white squares, while the other grid is full of curvy lines. Put a shape at right angles to the left grid, and it will come out of the right grid with its X and Y axes in an equally curvy shape. (Mathematically, here we are looking at a parabolic equation applied to a single axis.)

From now on, While only gets more intense, and its challenging potential is perhaps best summed up by the below collection of shape manipulation GIFs, directed by Bahrami.

  • The GIFs that follow this image contain potential puzzle solution spoilers, but they also clearly illustrate both how different grid patterns affect all shapes on the table and how to lift pieces from different grids to gradually reach a form of solution.

  • How to turn a 2D square into 3D While Donut.

  • Not only can you lift shapes, but you can also rotate their orientation, which is crucial for getting proper “solution” shapes.

  • One of the simplest 3D manipulation grid progressions: take a 2D shape and roll it up into a 3D donut with specific curves.

  • Notice how the far right grid translates the shapes of the other grids by changing the elements on all three axes. Repeating this translation twice creates a very unique shape.

If a puzzle has multiple grids on its table, you can put a shape on one of them to generate manipulated shapes on the other grids. Use YOUR MOUSE to lift one of these new shapes, then drag it to another grid for recursive formula application. If a grid turns a 2D shape into a 3D donut, you can grab the resulting donut, move it over the donut grid, and warp it that much more accordingly. The exact placement of 3D shapes on the more intense grids also changes which parts of their shapes are manipulated.

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