![]() ![]() If you have a bar, on the edge of your design, break it up or eliminate it. Repeat this process several times.īlocks with a solid bar down an outside edge tend to produce less exciting designs. If you have trouble designing, you can hold a ruler high in the air, Make sure your design is asymmetric.īlocks that mirror symmetrically along a diagonal line are ones for which the symmetry is most often missedĬheck carefully for this. Within the square make a simple asymmetricĭesign of 5 to 8 pieces, with straight lines, curves or both. STEP 1: Draw a 3 inch square on graph paper. Paper in addition to your other supplies. You will need a sheet of 8 1/2 by 11 transfer paper and two sheets of light weight Rives printing Leaf grows in the gap between those that grow opposite. Leaves on one side of the stem are mirror images of those on the other sede and each Of branching and leaf arrangements in this natural form. The word " bobo " is symmetrical by translation.Ī Succession of glide reflections establishes the akternate pattern The word " pod " is symmetrical by rotation. The word " bud " is symmetrical by mirror reflection. The letters A B C are symmetrical through reflection.Ī mirror through the center leaves their appearance unaltered.Ī figure is symmetrical if a symmetry operation leaves the appearance unaltered. Thus, the four symmetry operations are reduced to two operations-rotation and glide reflection.Ī symmetrical figure has repetative parts. Mirror reflection is glide reflection with zero glide, as translation is a special case of rotation. Mirror reflection is a special case of glide reflection. Or, a line that marks the path of a translation. Instead of a mirror line, we have a glide line, The image reverses,īut in addition it glides. Glide reflection is an indirect operation. Rotation and translation which involve displacement are called direct or proper operations. Because it flips rather than glides, it is called an indirect or improper operation. The motif does not stay on the surface of the plane, Superimposed on the image at the finish, or anywhere along the way. ![]() With translation or rotation, the image at the start can be directiy Roto-centers can be in the center of a unit cell line. The center of rotation is called a roto-center.ĭistant centers of rotation produce apparent translations. You can superimpose it exactly on another fundamental region. If you rotate one fundamental region around a point Left or right or diagonally while keeping the same orientation.ģ) Reflection - the motif reflects, as in a mirrorĤ) Glide reflection - the motif translates and reflects. These four types of repetition or symmetry operations are:ġ) Translation - one motif moves up or down, A 2-dimensional motif can repeat in only four different ways.
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