object spherical

Once you have opened a Maxima session, load package **draw**:

load("draw") $

To read the documentation on object **spherical**, write the following sentence:

describe(spherical) $

Function defined in spherical coordinates. In this example, variable **a** is the azimuth and variable **z** is the zenith. The expression is for the radius:

draw3d( surface_hide = true, axis_3d = false, color = salmon, spherical(sin(z)*cos(2*a),a,0,2*%pi,z,0,%pi))$

A geometrical model for genus Nautilus:

draw3d( color = green, surface_hide = true, axis_3d = false, spherical(a+z,a,0,3*%pi,z,0,%pi))$

© 2011-2016, TecnoStats.