https://projects.cs.dal.ca/cccg2014/proceedings/papers/paper44.pdf
http://en.wikipedia.org/wiki/Affine_transformation
In geometry, an affine transformation, affine map[1] or an affinity (from the Latin, affinis, "connected with") is a function between affine spaces which preserves points, straight lines and planes. Also, sets of parallel lines remain parallel after an affine transformation. An affine transformation does not necessarily preserve angles between lines or distances between points, though it does preserve ratios of distances between points lying on a straight line.
سوال ۴ این تمرین سوال امتحان میان ترم ما بود:
http://people.csail.mit.edu/indyk/6.838-old/handouts/a1.pdf
http://people.csail.mit.edu/indyk/6.838-old/handouts/lec10.pdf
http://www.cs.umd.edu/class/spring2012/cmsc754/Lects/lect16.pdf
http://www-sop.inria.fr/geometrica/events/wocg14-symmetry_and_periodicity/
http://jazz.cias.osakafu-u.ac.jp/~uno/GeomPuzzleGame/
http://www.dais.is.tohoku.ac.jp/~socg2014/#workshops
file:///C:/Users/Sepideh/Desktop/Chapter13.pdf
(فارسی: همان فصل کتاب هندسه محاسباتی است)