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v. t. e. In technical drawing and computer graphics, a multiview projection is a technique of illustration by which a standardized series of orthographic two-dimensional pictures are constructed to represent the form of a three-dimensional object. Up to six pictures of an object are produced (called primary views ), with each projection plane ...
Trisection can be approximated by repetition of the compass and straightedge method for bisecting an angle. The geometric series 1 / 3 = 1 / 4 + 1 / 16 + 1 / 64 + 1 / 256 + ⋯ or 1 / 3 = 1 / 2 − 1 / 4 + 1 / 8 − 1 / 16 + ⋯ can be used as a basis for the bisections. An approximation to any degree of accuracy can be obtained in a finite ...
A right angle may be expressed in different units: 1 / 4 turn; 90° π / 2 radians; 100 grad (also called grade, gradian, or gon) 8 points (of a 32-point compass rose) 6 hours (astronomical hour angle) Rule of 3-4-5. Throughout history, carpenters and masons have known a quick way to confirm if an angle is a true right angle.
Ray-cast image of idealized universal joint with shadow. Ray casting is the methodological basis for 3D CAD/CAM solid modeling and image rendering. It is essentially the same as ray tracing for computer graphics where virtual light rays are "cast" or "traced" on their path from the focal point of a camera through each pixel in the camera sensor to determine what is visible along the ray in the ...
Bearing (navigation) A standard Brunton compass, used commonly by geologists and surveyors to obtain a bearing in the field. In navigation, bearing or azimuth is the horizontal angle between the direction of an object and north or another object. The angle value can be specified in various angular units, such as degrees, mils, or grad.
Propagation of a ray through a layer. The transfer-matrix method is a method used in optics and acoustics to analyze the propagation of electromagnetic or acoustic waves through a stratified medium; a stack of thin films. [1] [2] This is, for example, relevant for the design of anti-reflective coatings and dielectric mirrors .
A 3D projection (or graphical projection) is a design technique used to display a three-dimensional (3D) object on a two-dimensional (2D) surface. 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 ...
X-ray crystallography is the experimental science determining the atomic and molecular structure of a crystal, in which the crystalline structure causes a beam of incident X-rays to diffract into many specific directions. By measuring the angles and intensities of the X-ray diffraction, a crystallographer can produce a three-dimensional picture ...