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A birthday card is a greeting card given or sent to a person to celebrate their birthday. Similar to a birthday cake, birthday card traditions vary by culture but the origin of birthday cards is unclear. [1] The advent of computing and introduction of the internet and social media has led to the use of electronic birthday cards or even Facebook ...
These projections rely on visual perspective and aspect analysis to project a complex object for viewing capability on a simpler plane. 3D projections use the primary qualities of an object's basic shape to create a map of points, that are then connected to one another to create a visual element. The result is a graphic that contains conceptual ...
Cube mapping was first proposed in 1986 by Ned Greene in his paper “Environment Mapping and Other Applications of World Projections”, [3] ten years after environment mapping was first put forward by Jim Blinn and Martin Newell. However, hardware limitations on the ability to access six texture images simultaneously made it infeasible to ...
Planar projections are the subset of 3D graphical projections constructed by linearly mapping points in three-dimensional space to points on a two-dimensional projection plane. The projected point on the plane is chosen such that it is collinear with the corresponding three-dimensional point and the centre of projection .
Direct projection of 3-sphere into 3D space and covered with surface grid, showing structure as stack of 3D spheres (2-spheres) In mathematics , a hypersphere or 3-sphere is a 4-dimensional analogue of a sphere , and is the 3-dimensional n -sphere .
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"An Album of Map Projections" (PDF). (12.6 MB), U.S. Geological Survey Professional Paper 1453, by John P. Snyder (USGS) and Philip M. Voxland (U. Minnesota), 1989. A Cornucopia of Map Projections, a visualization of distortion on a vast array of map projections in a single image. G.Projector, free software can render many projections (NASA GISS).