Gouraud shading

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Gouraud shading

In 3D graphics, a technique developed by Henri Gouraud in the early 1970s that computes a shaded surface based on the color and illumination at the corners of every triangle. Gouraud shading is the simplest rendering method and is computed faster than Phong shading. It does not produce shadows or reflections. The surface normals at the triangle's points are used to create RGB values, which are averaged across the triangle's surface. See flat shading and Phong shading.


Types of Shading
Flat, Gouraud and Phong shading are the three most common types of shading used on 3D objects. (Image courtesy of Intergraph Computer Systems.)
References in periodicals archive ?
With the new SGI V12 graphics, Octane2 workstations lead the industry in performance, drawing over 18 million 1 pixel lit depth-buffered, Gouraud-shaded triangles per second and maintaining a highly advanced pixel fill rate of 448 megapixels per second.
The graphics deliver 250,000 flat-shaded triangles per second and 42,000 Gouraud-shaded, lighted, independent polygons per second.
6 million lit, Gouraud-shaded, Z-buffered triangles per second, with a tri-linear textured fill rate of 60 million pixels per second.
One-third of the frames are rendered as anti-aliased wireframe, and the other two-thirds as Gouraud-shaded polygons.
Each figure consists of 22,342 meshed, z-buffered, Gouraud-shaded, bilinear filtered, fogged, lit polygons.
5 million-pixel resolution as the Z25, while providing a textured pixel fill rate of 46 megapixels per second -- this is for the highest quality textured pixels: trilinear interpolated, 32-bit texels, Z-buffered, and Gouraud-shaded.
Unlike other 3D graphics cards on the market, these pixels are trilinear interpolated, 32-bit true color, Gouraud-shaded, and Z-buffered, allowing users to create images/scenes of the highest quality and realism.
Utilizing 3Dlabs' GLINT 500TX processor, the Diamond Fire GL 3000 is capable of rendering up to 500,000 gouraud-shaded polygons per second.
Utilizing the 3Dlabs' GLINT 300SX processor, the Diamond Fire GL 2000 is capable of rendering up to 300,000 gouraud-shaded polygons per second.
Reactor offers some of the most impressive capabilities ever offered on a consumer game card, with application throughput of up to 600,000 25-pixel Gouraud-shaded, mono-source lit, bilinear-filtered texture-mapped triangles per second, rendered in true color with sub-pixel and sub-texel accurate positioning.
2 million lit, Gouraud-shaded, Z-buffered, 50-pixel 3D triangles per second -- an unparalleled achievement on NT.
2 million lit, Z-buffered, Gouraud-shaded, 50-pixel 3D triangles per second.