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The wagon-wheel effect (alternatively called stagecoach-wheel effect) is an optical illusion in which a spoked wheel appears to rotate differently from its true rotation. The wheel can appear to rotate more slowly than the true rotation, it can appear stationary, or it can appear to rotate in the opposite direction from the true rotation ...
The most famous of these effects is the application of a perspective effect on a background layer by scaling and rotating the background layer in this manner. This transforms the background layer into a two-dimensional horizontal texture-mapped plane that trades height for depth. Thus, an impression of three-dimensional graphics is achieved.
Gimbal lock is the loss of one degree of freedom in a multi-dimensional mechanism at certain alignments of the axes. In a three-dimensional three-gimbal mechanism, gimbal lock occurs when the axes of two of the gimbals are driven into a parallel configuration, "locking" the system into rotation in a degenerate two-dimensional space.
Illustration of a simple three-axis gimbal set; the center ring can be vertically fixed. A gimbal is a pivoted support that permits rotation of an object about an axis. A set of three gimbals, one mounted on the other with orthogonal pivot axes, may be used to allow an object mounted on the innermost gimbal to remain independent of the rotation of its support (e.g. vertical in the first ...
Further rotation of the dial moves the lever, retracting the locking mechanism and opening the lock. When the cams are aligned and the shackle is put back in (after it was taken out after unlocking), the force required to push it back in rattles the system and may often cause the cams lose their alignment, thus locking once more.
Bejeweled Twist is a tile-matching puzzle video game developed and published by PopCap Games.It is the third game overall and first spin-off game in the Bejeweled series, as well as being the first PopCap title to be released in high definition and feature widescreen support.
Other common names for it include "clear sight", "spin window", "Kent Screen" and "rotating windshield wiper". Clear view screens were patented in 1917 by Samuel Augustine de Normanville and Leslie Harcourt Kent as a stand-alone pillar-mounted screen, [ 1 ] with later patents for telescope and optics covers, followed by the more familiar ships ...
Overview from above, looking down on the camera panning left and right of the subject Example of a panning technique photo (shutter speed: 1/80). In cinematography and photography, panning means swivelling a still or video camera horizontally from a fixed position.