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  2. Computer representation of surfaces - Wikipedia

    en.wikipedia.org/wiki/Computer_representation_of...

    A surface may be composed of one or more patches, where each patch has its own U-V coordinate system. These surface patches are analogous to the multiple polynomial arcs used to build a spline. They allow more complex surfaces to be represented by a series of relatively simple equation sets rather than a single set of complex equations.

  3. Caustic (optics) - Wikipedia

    en.wikipedia.org/wiki/Caustic_(optics)

    There have been many different approaches to address the continuous problem. One approach uses an idea from transportation theory called optimal transport [10] to find a mapping between incoming light rays and the target surface. After obtaining such a mapping, the surface is optimized by adapting it iteratively using Snell's law of refraction ...

  4. Waveform graphics - Wikipedia

    en.wikipedia.org/wiki/Waveform_graphics

    Text and graphics could be mixed, and there were additional tools for drawing axes and markers. The waveform graphics system was used only for a short period of time before it was replaced by the more sophisticated ReGIS system, first introduced on the VT125 in 1981. [1] ReGIS allowed the construction of arbitrary vectors and other shapes.

  5. Dyakonov surface wave - Wikipedia

    en.wikipedia.org/wiki/Dyakonov_surface_wave

    The previously known electromagnetic surface waves, surface plasmons and surface plasmon polaritons, exist under the condition that the permittivity of one of the materials forming the interface is negative, while the other one is positive (for example, this is the case for the air/metal interface below the plasma frequency). In contrast, the ...

  6. Wave surface - Wikipedia

    en.wikipedia.org/wiki/Wave_surface

    In mathematics, Fresnel's wave surface, found by Augustin-Jean Fresnel in 1822, is a quartic surface describing the propagation of light in an optically biaxial crystal. Wave surfaces are special cases of tetrahedroids which are in turn special cases of Kummer surfaces. In projective coordinates (w:x:y:z) the wave surface is given by

  7. Surface wave - Wikipedia

    en.wikipedia.org/wiki/Surface_wave

    Surface waves span a wide frequency range, and the period of waves that are most damaging is usually 10 seconds or longer. Surface waves can travel around the globe many times from the largest earthquakes. Surface waves are caused when P waves and S waves come to the surface. Examples are the waves at the surface of water and air (ocean surface ...

  8. List of molecular graphics systems - Wikipedia

    en.wikipedia.org/wiki/List_of_molecular_graphics...

    Build and visualize molecule and periodic systems (crystal, structures, fluids...), animate trajectories, visualize molecular orbitals, density, electrostatic potential... visualize graph such IR, NMR, dielectric and optical tensors.

  9. Genigraphics - Wikipedia

    en.wikipedia.org/wiki/Genigraphics

    The first Genigraphics systems (100 Series and 100A Series) used an array of buttons, dials, knobs and joysticks, along with a built in keyboard, as the means of user interface. The PDP-11/40 computer was housed in a tall cabinet and used random access magnetic tape drives (DECtape) for storing completed presentations.