Traditional cube map will be the six faces of the arrangement according to the format of FIG.įIG 6 cubemap conventional form and arrangementįigure this case, it may be difficult to understand intuitively, but which can experience when using special player to play the corresponding video panorama.įacebook can use tools developed Transform360 equidistant cylindrical projection converts the format of a conventional cube map. 5 far from a sphere, the pixel continues to be unevenly However, at the corners of each face of the projected pixel distribution compared ideally still less uniform. Approach is outwardly projected on the sphere content to a cube, and then expand.Ĭompared equidistant cylindrical projection, distortion cubemap smaller. "Cube map" (Cube Map) is another panoramic picture storage format, commonly used in the game. Center of the screen is the front, left and right rear surround be connected.įigure 3 an isometric projection of the columnar format (untreated screen) Here two figures are isometric projection screen format when not pillar rendered panorama format (sphere) of.
Further, this format screen without distortion rendered obvious.įigure 2 an isometric projection columnar format (untreated screen) Disadvantages are also obvious, a lot of balls up and down the number of poles projected out of the pixels, and the details of rich equatorial region is compared to the number of pixels on small, relatively poor result for reducing sharpness. The advantage of this format is relatively straightforward, and the projection is rectangular. įigure 1 Histogram an isometric projection Tissot Indicatrix The so-called "equidistant cylindrical projection" is the most common world map projection, practice is the warp and weft are equally (or the density) projected onto a rectangular plane, Borrowing map and comments on the Google blog.
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A difference because the video four weeks full of little use here will demonstrate other video shots. Tubing 360 ° currently offers two video formats: Format equidistant cylindrical projection (Equirectangular) and equiangularly cube map format (Equi-Angular Cubemap).
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