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- Ringworld:
- A planet-sized Outer Space megastructure based on the Ringworld series of novels by Larry Niven.
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- Graphical Projection Comparison:
- Side-by-side comparison of different types of graphical projection.
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- Fractal Objects:
- A collection of fractal objects including the Menger Sponge, the Sierpinski Pyramid and the Sierpinski Tetrahedron. All three objects can be used in CSG operations.
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- Color Solids:
- Pigments including the HSL (Hue, Saturation, Lightness), HSV (Hue, Saturation, Value) and RGB (Red, Green, Blue) color models.
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- Munsell Color Solid:
- Approximated rendering of the 1943 renotated versions of colors appearing in the 1929 Munsell Book of Color.
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- Graphical Projection Examples:
- Illustration of various types of graphical projection, and how they are produced. Modeled in POV-Ray and then converted to SVG.
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- Fallout Camera Angles:
- A mockup of the camera and lighting angles used in the video games Fallout and Fallout 2. These games use an unusual form of trimetric projection that is tileable in six directions.
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- CIE Color Solids:
- The sRGB and human-visible gamuts plotted within the CIELAB, CIELCHab, CIELUV, CIELCHuv, CIExyY and CIEXYZ color spaces.
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- Generating Cubemaps:
- A demonstration of how to create cube-mapped panoramas.
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- Camera Focal Length:
- A demonstration showing how adjusting a photographic camera’s distance and focal length, while keeping the target object in frame, can introduce geometric distortions (called foreshortening) into the image. The top number is the camera angle. The bottom number is the camera distance.
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- Camera Focal Blur:
- A demonstration showing the effect of changing a camera’s aperture over time. The distance of the camera from the focal point (i.e. the center of the scene) is a constant 16 units. Each gray tile is 0.25 by 0.25 units. The top value is the aperture valure (AV). The bottom number is the f-stop.
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- Solar System Orrery:
- A model of our solar system with Sol at the center. Planets rotate around the sun along their orbital paths according to the time of year.
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- Surface of Latitude:
- Different representations of the Earth’s latitudes.
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Fig. a. A naive approach to specifying a surface of latitude would be to cut through the Earth in a straight line to form a plane.
Fig. b. However, it would be more accurate to say that on a spherical Earth, a circle of latitude forms a cone pointing toward the Earth’s center.
Fig. c. But the Earth deviates from a perfect sphere, and instead roughly forms the shape of an ellipsoid (greatly exaggerated in this image), causing this cone to become truncated. This representation corresponds to "geodetic latitude".
Fig. d. Ellipsoidal coordinates are used in the calculation of the Earth’s gravitational field. Within the confines of the reference ellipsoid the gravitational field lines very nearly form a truncated hyperboloid.
Fig. d. Maclaurin spheroid. To do.
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- Offset/Parallel Surface:
- A surface whose points are at a fixed normal distance from a given surface. Or, the envelope of a family of congruent spheres centered on the surface.
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