A glide reflection is a type of isometry of the Euclidean plane: the combination of a reflection in a line and a translation along that line. Reversing the order of combining gives the same result. Depending on context, we may consider a simple reflection (without translation) as a special case where the translation vector is the zero vector.
Read more about this topic: Transformation (function)
Famous quotes containing the words glide and/or reflection:
“Our life is not so much threatened as our perception. Ghostlike we glide through nature, and should not know our place again.”
—Ralph Waldo Emerson (1803–1882)
“But before the extremity of the Cape had completely sunk, it appeared like a filmy sliver of land lying flat on the ocean, and later still a mere reflection of a sand-bar on the haze above. Its name suggests a homely truth, but it would be more poetic if it described the impression which it makes on the beholder.”
—Henry David Thoreau (1817–1862)