Text

Thebes provides a text3D() function that draws text in a 3D environment. For more information about using fonts and font selection, refer to the chapter in the Luxor documentation.

You specify the 3D location of the text, and optionally supply rotations and text alignment (halign etc.). By default the text in Thebes (as in Luxor) runs along the x-axis, and it lies in the xy plane.

Use Rotations.jl to specify rotations.

fontsize(50)

background("black")
origin()
setlinejoin("bevel")
eyepoint(Point3D(250, 250, 250))
perspective(400)
sethue("white")
axes3D(220)

fontsize(40)
fontface("Georgia-Italic")

text3D("the x-axis", Point3D(0, 0, 0))
text3D("the y-axis", Point3D(0, 0, 0), rotation=RotZ(π/2))
text3D("the z-axis", Point3D(0, 0, 0), rotation=RotX(-π/2) * RotZ(π/2), halign=:right)

You can also use some of Luxor's text functions, such as textextents(), which helps you get the (2D) dimensions of text.

using Thebes, Luxor, Colors, Rotations
eyepoint(Point3D(250, 250, 550))
perspective(500)

fontsize(50)

te = textextents("Julia")

for y in -1200:te[3]:1200
        for x in -1200:te[4]:1200
            sethue(HSB(mod(x*y, 360), .6, .9))
            text3D("Julia", Point3D(x, y, 0), about=Point3D(x, y, 0), rotation=RotZ(π/2))
        end
    end

It's also possible to write math equations in $\LaTeX$ by passing a LaTeXString to the text function. Thebes and Luxor use MathTeXEngine.jl to parse the LaTeXString. You should load MathTeXEngine.jl (using MathTeXEngine) before accessing this feature.

using Luxor
using Thebes
using MathTeXEngine
using Rotations
using LaTeXStrings

@drawsvg begin
    background(0.0, 0.05, 0.1)
    helloworld()
    perspective(300)
    eyepoint(200, 200, 200)
    sethue("white")
    fontsize(40)
    setline(1)
    e = L"e^{i\pi} + 1 = 0"
    for i in 0:π/10:2π - π/10
        text3D(e,
            sphericaltocartesian(50, i, π/2),
            about=sphericaltocartesian(50, i, π/2),
            rotation=RotZ(i))
    end
end

 text3D(str, anchor::Point3D;
    halign=:left,
    valign=:baseline,
    about=Point3D(0., 0., 0.),
    rotation::Rotation=RotXYZ(0, 0, 0))