Portal:Portal
A portal is an opening in the walls of a building, gate or fortification, and especially a grand entrance to an important structure. Doors, metal gates or portcullis in the opening can be used to control entry or exit. The surface surrounding the opening may be made of simple building materials or decorated with ornamentation. Elements of a portal can include the voussoir, tympanum, an ornamented mullion or trumeau between doors, and columns with carvings of saints in the westwork of a church.
Portals in science fiction allow rapid travel between distant locations, often originating from some combination of natural phenomenon and technological device. These fictional devices are required for most stories on an inter-solar scale, otherwise transit time would be excessive for storytelling purposes. An advantage of portal technology over a faster-than-light drive is that it can be imagined to work instantly, and can travel to the past or future. In other forms of fiction, a portal may be magical, and connect to an alternate universe or plane of existence. Template:/box-footer
Lua error in package.lua at line 80: module 'Module:Box-header/colours' not found. In computer-generated imagery and real-time 3D computer graphics, portal rendering is an algorithm for visibility determination.
A game level might contain many graphical polygons; only a few of which may be visible on screen at a given time. Visibility determination allows the renderer to decide which of those fall into that category and thus reduce rendering time.
For example, in a computer game, the game area might be divided to several sectors. These sectors would be then connected to each other by small openings such as doors or windows. These openings are referred as portals. When the sector behind a portal needs to be drawn, the only parts that are visible are the parts that can be seen through the portal. Therefore, the sector can be clipped against the portal boundaries to remove overdraw.
The use of portals simplifies the game engine's task of determining visible areas and objects from any given point of view of the level, and simplifies rendering by allowing it to use each portal as a viewing frustum for the area it leads to.
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Charles Frederick Algernon Portal, 1st Viscount Portal of Hungerford KG GCB OM DSO & Bar MC (21 May 1893 - 22 April 1971) was a senior Royal Air Force officer and an advocate of strategic bombing. He was the British Chief of the Air Staff during most of the Second World War.
Born in Hungerford, Portal was educated at Winchester College and Christ Church, Oxford, but left undergraduate life prematurely to enlist as a private soldier in 1914. Joining the British Army as a dispatch rider in the motorcycle section of the Royal Engineers on the Western Front, he was given command of all riders in the 1st Corps Headquarters Signals Company in December 1914.
In 1915 Portal transferred to the Royal Flying Corps, serving first as an observer and eventually a flying officer. He reached the rank of lieutenant colonel and earned the Military Cross. After the war, he took over No. 7 Squadron RAF and concentrated on improving bombing accuracy. By 1939 Portal was Director of Organization in the Air Ministry.
At the outbreak of World War II, Portal was made Acting Air Marshal and later commander-in-chief of RAF Bomber Command. Winston Churchill was impressed with Portal's strategy of area bombing (which resulted in the Luftwaffe bombing London instead of British airfields) and knighted Portal in July 1940. He was appointed Air Chief Marshal in October 1940, and Marshal of the Royal Air Force in June 1944.
After the war, Portal retired from the RAF and was created Baron Portal of Hungerford (later Viscount Portal). After a 5-year period at the Ministry of Supply, he was elected Chairman of British Aluminium and fought a hostile takeover bid by Sir Ivan Stedeford, Chairman & CEO of Tube Investments. Losing to Stedeford, he was elected chairman of the British Aircraft Corporation in 1960, and died in 1971, aged 77.
- Door opens mid-Qantas flight; plane makes an emergency landing
- Belgian Indymedians discuss participatory journalism at open door day
- Alaskan plane crash survivors say cargo door swung open
- World Health Organization launches clinical trial website
- Kids game portal BBC Jam to close after competition complaints
- With pressure from France, Chad and Sudan open door to possible troop deployment
- Switzerland shut door on Korean Republic 2-0 in Group G
- Sydney train doors stuck, passengers delayed
- Entrepreneur's RFID chip implant to open doors, start car
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- Portal hypertension is often the result of cirrhosis of the liver
- The Dark Portal is the first book in the Deptford Mice trilogy
- Fort Portal in Uganda is the seat of both Kabarole and the Toro Kingdom
- Portal's Weighted Companion Cube has fan-created plush and papercraft versions
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El Portal is a village in Miami-Dade County, Florida, USA. The village name is derived from the Spanish phrase for "the gate", after two wooden gates that once stood as a gateway to the village. As of 2004, the population recorded by the U.S. Census Bureau is 2,468.
A small, diverse enclave between Miami Shores and Miami, El Portal was incorporated on December 7, 1937, by residents eager for strict zoning that would ensure tidiness. Three small subdivisions (now neighborhoods), included Sherwood Forest, El Jardin (Spanish for "The Garden"), and El Portal merged into the Village of El Portal.
El Portal has been designated as a bird sanctuary for more than 50 years.
Lua error in package.lua at line 80: module 'Module:Box-header/colours' not found. Now you're thinking with portals.
- GLaDOS, Portal
- What are portals?
- List of portals
- Featured portals
