Algorithmic worlds 


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BlogA blog about algorithmic art and fractal aesthetic. Click here to subscribe to the RSS feed February 1st 2011 Truchet and MondrianRecently I wrote a variation on the Truchet pattern. Recall that the Truchet pattern involves a tiling as well as a set of decorated tiles. The decorated tiles are distributed randomly on the tiling, creating a pattern. In the variation, instead of having a fixed set of decoration, a decoration for each (square) tiles is constructed as follows. Through each edge of the tile, there will be a segment of line perpendicular to it. The actual location of the line segment is chosen randomly. Inside the tile, the line segment coming from all four edges are somehow combined to complete the decoration. When they are assembled, an interesting pattern appears.
A typical tile decoration. The endpoints on the edges of the outgoing segments are chosen randomly. Nine tiles. The edges of the tiles are drawn in light gray. The pattern is drawn in black. The pattern, without the underlying tiling. Now we can color the middle regions of each tile and get something reminiscent of Mondrian's famous pattern. The second image is simply a zoom, to get the size of the pattern compared to the size of the image in a ratio closer to Mondrian's paintings.
Of course it is not very interesting to draw Mondrianlike pictures, and in order to do this, one could simply draw random vertical lines, horizontal lines and color some of the resulting regions. What is interesting about this way of drawing Mondrianlike pattern is that it is local. The algorithm needs to know only what is going on in the tile the pixel belongs to. Such "pixel by pixel" drawing algorithms can be scaled easily and are wellsuited for pattern piling. Here are two pictures resulting from piling Mondrianlike patterns. Click on the pictures for zoomable images. The two pictures differ only by their "magnification step", namely the scaling factor between two piled patterns. It is equal to 2 in the first one and to 6 in the second one.
201101211 201101221 [Update : A picture of the fractal Mondrian pattern is available as open edition prints here.]


