project3d: Stereographic projection
In nspyrison/tourr: Implement Tour Methods in R Code

Math from http://dogfeathers.com/java/3dproj.html

1	project3d(d3, length = par("din")[1] * 25.4, z0 = 300, d = 30)

`d3`	3d numeric matrix giving position of points
`length`	width of plot, mm
`z0`	distance from eye to screen, mm
`d`	half interpupilary distance, mm

nspyrison/tourr documentation built on Aug. 29, 2019, 2:56 a.m.

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