#### 11.2.12 bdLabel

• bdLabel( <3Dpoint>, <"text">, [options] )
• Description: defines a label in the space, the <3Dpoint> is the anchor. The label is drawn on the projection plane and not really in the space, but its anchor is handled in the scene to determine the display order. Here are the bdLabel options:
• TeXify := < 0/1 >: shows if the label has to be compiled by TEX, see general option TeXifyLabels.
• scale := < number>0 >. If the option TeXify is $1$, the label size can be modified with this option.
• color := < color >. Sets the label color (black by default).
• dotcolor := < color >. Defines the anchor color if it has to be displayed (equal to the color option by default).
• labelpos := < [distance cm, direction affix] >. Shows the lable position with respect to the anchor on the projection plane (Nil by default, in that case the distance is considered as zero).
• labelsize := < small/... >. Defines the label size like LabelSize (equal to LabelSize by default) if the option TeXify is $0$.
• labelstyle := < label type >. Defines the style label like LabelStyle (equal to LabelStyle by default).
• showdot := < 0/1 >. Shows if the anchor has to be drawn or not (0 by default).
• if showdot is $1$, options of bdDot can be used because that macro will be called.
• Exemple(s)

 \begin{texgraph}[name=texify,export=eps]   Marges(0,0,0,0),view(-3,3,-3,3),   view3D(-3,3,-3,3,-3,3), size(7.5),   B:=M(0,2,0), A:=M(0,0,0), C:=M(0,0,1.5),   Build3D(    bdAxes([0,0], [color:=gold,arrows:=1]),    bdPlan([0,0,1+i,2], [color:=darkseagreen,                          scale:=0.75]),    bdSurf(M(u,-v,sqrt(u^4+v^4)-2),            [color:=steelblue, u:=[-2,2],             v:=u, smooth:=1,clip:=1,             clipwin:=[M(-3,-3,-3),M(3,3,2)]]),    bdLabel([0.25*(1+i),2.25],"z=\sqrt{x^4+y^4}-2",            [TeXify:=1, scale:=0.75])   ),   Display3D()   \end{texgraph}

Option usage of TeXify