geometries: Surface Area and Volume of Geometrical Objects
In ReacTran: Reactive Transport Modelling in 1d, 2d and 3d

Description Usage Arguments Value Author(s) Examples

g.sphere the surface and volume of a sphere
g.spheroid the surface and volume of a spheroid
g.cylinder the surface and volume of a cylinder; note that the surface area calculation ignores the top and bottom.

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g.sphere(x)
g.spheroid (x, b = 1)
g.cylinder (x, L = 1)

`x`	the radius
`b`	the ratio of long/short radius of the spheroid; if b<1: the spheroid is oblate.
`L`	the length of the cylinder

A list containing:

`surf`	the surface area
`vol`	the volume

Filip Meysman <filip.meysman@nioz.nl>, Karline Soetaert <karline.soetaert@nioz.nl>

 mf <- par(mfrow = c(3, 2))
 x  <- seq(from = 0, to = 1, length = 10)
 plot(x, g.sphere(x)$surf, main = "sphere surface")
 plot(x, g.sphere(x)$vol, main = "sphere volume")
 plot(x, g.spheroid(x, b = 0.5)$surf, main = "spheroid surface")
 plot(x, g.spheroid(x, b = 0.5)$vol, main = "spheroid volume")
 plot(x, g.cylinder(x, L = 1)$surf, main = "cylinder surface")
 plot(x, g.cylinder(x, L = 1)$vol, main = "cylinder volume")
 par("mfrow" = mf)