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  2. Constraint (computer-aided design) - Wikipedia

    en.wikipedia.org/wiki/Constraint_(computer-aided...

    The shaft and pulleys share a common centerline. The constraints of the key are set in relation to the keyseat. A constraint in computer-aided design (CAD) software is a limitation or restriction imposed by a designer or an engineer upon geometric properties [1]: 203 of an entity of a design model (i.e. sketch) that maintains its structure as the model is manipulated.

  3. AutoLISP - Wikipedia

    en.wikipedia.org/wiki/AutoLISP

    AutoLISP is a small, dynamically scoped, dynamically typed Lisp language dialect with garbage collection, immutable list structure, and settable symbols, lacking in such regular Lisp features as macro system, records definition facilities, arrays, functions with variable number of arguments or let bindings.

  4. Packing problems - Wikipedia

    en.wikipedia.org/wiki/Packing_problems

    A set of objects, some or all of which must be packed into one or more containers. The set may contain different objects with their sizes specified, or a single object of a fixed dimension that can be used repeatedly. Usually the packing must be without overlaps between goods and other goods or the container walls.

  5. Blend modes - Wikipedia

    en.wikipedia.org/wiki/Blend_modes

    This lightens the bottom layer depending on the value of the top layer: the brighter the top layer, the more its color affects the bottom layer. Blending any color with white gives white. Blending with black does not change the image. The operation is not invertible due to possible clipping of highlights. (The clipping happens in the same area ...

  6. ISO 13567 - Wikipedia

    en.wikipedia.org/wiki/ISO_13567

    Agent responsible (clause 6.1) (2 characters, indicating the person or organisation responsible for the layer information—manufacturer, A- architect A2 architect#2 on the same project B- building surveyors C- civil engineers E- electrical engineers F- facility engineers G- GIS engineers and land surveyors H- heating and ventilating engineers I- interior designers L- landscape architects Q ...

  7. Systems Tool Kit - Wikipedia

    en.wikipedia.org/wiki/Systems_Tool_Kit

    Systems Tool Kit (formerly Satellite Tool Kit), often referred to by its initials STK, is a multi-physics software application from Analytical Graphics, Inc. (an Ansys company) that enables engineers and scientists to perform complex analyses of ground, sea, air, and space platforms, and to share results in one integrated environment. [1]

  8. Orientability - Wikipedia

    en.wikipedia.org/wiki/Orientability

    A torus is an orientable surface The Möbius strip is a non-orientable surface. Note how the disk flips with every loop. The Roman surface is non-orientable.. In mathematics, orientability is a property of some topological spaces such as real vector spaces, Euclidean spaces, surfaces, and more generally manifolds that allows a consistent definition of "clockwise" and "anticlockwise". [1]

  9. Gimbal lock - Wikipedia

    en.wikipedia.org/wiki/Gimbal_lock

    In formal language, gimbal lock occurs because the map from Euler angles to rotations (topologically, from the 3-torus T 3 to the real projective space RP 3, which is the same as the space of rotations for three-dimensional rigid bodies, formally named SO(3)) is not a local homeomorphism at every point, and thus at some points the rank (degrees ...