<canvas>
There is no web standard markup language for 3D graphics. The XML application X3D is a markup language for 3D graphics,
but not (yet?) a standard for the web and not natively supported by any browser. A 2D projection of a 3D structure can be included in
a web document as an image in raster or SVG format, or by "drawing" it on a <canvas>.
An author could construct a 3D digital graphic in some application, like a CAD application,
and have it output a 2D projection image in raster or SVG.
<canvas>.View the JavaScript in the source code of this page to see how figure 1 is made, and see this explanation for more information on orthogonal projection.
Figure 2 shows the result of plotting a 3D function
on a <canvas>.
Obtained by simply delineating figure 1 by hand in Inkscape.
