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One way is to use the intrinsic orientation of the reference object. In this case, the regions that are above, below, in front of, behind, to the left of, and to the right of the reference objects are the regions which are adjacent to the top, bottom, front, back, left side, and right side, respectively.
Orthogonal (or perpendicular) – at a right angle (at the point of intersection). Elevation – along a curve from a point on the horizon to the zenith, directly overhead. Depression – along a curve from a point on the horizon to the nadir, directly below. Vertical – spanning the height of a body. Longitudinal – spanning the length of a ...
In heraldry, right and left is always used in the meaning of proper right and proper left, as for the imaginary bearer of a coat of arms; to avoid confusion, the Latin terms dexter and sinister are often used. [5] The alternative is to use language that makes it clear that the viewer's perspective is being used.
The left-handed orientation is shown on the left, and the right-handed on the right. The orientation of a real vector space or simply orientation of a vector space is the arbitrary choice of which ordered bases are "positively" oriented and which are "negatively" oriented.
A multiview projection is a type of orthographic projection that shows the object as it looks from the front, right, left, top, bottom, or back (e.g. the primary views), and is typically positioned relative to each other according to the rules of either first-angle or third-angle projection. The origin and vector direction of the projectors ...
An example of a quotient space of a manifold that is also a manifold is the real projective space, identified as a quotient space of the corresponding sphere. One method of identifying points (gluing them together) is through a right (or left) action of a group, which acts on the manifold. Two points are identified if one is moved onto the ...
Fig. 7 – The left-handed orientation is shown on the left, and the right-handed on the right. Fig. 8 – The right-handed Cartesian coordinate system indicating the coordinate planes. Once the x- and y-axes are specified, they determine the line along which the z-axis should lie, but there are two possible orientations for this line.
Visualised as rolling on the upper and lower surfaces of the drawing plane, respectively. First-angle projection is as if the object were sitting on the paper and, from the "face" (front) view, it is rolled to the right to show the left side or rolled up to show its bottom. It is standard throughout Europe and Asia (excluding Japan).