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geom3d

 tname
 find the name of the parameter used in the parametric equations of the given line

 Calling Sequence tname(obj)

Parameters

 obj - line

Description

 • The routine tname returns the name of the parameter in the parametric equations of the line obj. It returns either a name or FAIL.
 • The command with(geom3d,tname) allows the use of the abbreviated form of this command.

Examples

 > $\mathrm{with}\left(\mathrm{geom3d}\right):$
 > $\mathrm{_EnvTName}≔'t':$
 > $\mathrm{point}\left(A,0,0,0\right),\mathrm{point}\left(B,1,1,11\right):$
 > $\mathrm{line}\left(l,\left[A,B\right]\right)$
 ${l}$ (1)
 > $\mathrm{detail}\left(l\right)$
 Warning, assuming that the names of the axes are _x, _y, and _z
 $\begin{array}{ll}{\text{name of the object}}& {l}\\ {\text{form of the object}}& {\mathrm{line3d}}\\ {\text{equation of the line}}& \left[{\mathrm{_x}}{=}{t}{,}{\mathrm{_y}}{=}{t}{,}{\mathrm{_z}}{=}{11}{}{t}\right]\end{array}$ (2)
 > $\mathrm{tname}\left(l\right)$
 ${t}$ (3)