implicit_plot3d string "\n" ignored

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The print output is as intended, but gl plot ignores "\n"

It seems that neither text nor text3d translate \n as a newline. However, this is not mentioned in their respective documentation...

Is there a special syntax for strings in plots?

It seems that text{3d} ignores control characters.

Do I really have to add (and position) each line separately?

It seems so...

I wanted to provide portable and multiple HTML plot pages facilitating comparing plots, and provide enough information in the plots so that they describe themselves; more or less. So the id's don't get forgotten and lost.

Create wrapper functions, which compute their labels, use default values if not passed.

Now that I think about it; there are special functions that, I think, said they would combine html "fragments" (what ever they are). Does anybody know about these programs? References are fine.

I doubt it :in Sage label positions are computed in the problem space ; in HTML, they are interpreted as relative to the display space....

HTH,

I also tried:

var('x,y,z')
lim = 2
gl = implicit_plot3d(x^2+y^2+z^2 == 1
                     , (x, -lim, lim), (y, -lim, lim), (z, -lim, lim)
                     , color='purple', mesh=True)
gl += text3d('test start\nHUGO\\n\ntest add', [1, 1, 1] )
gl

And the graphic object was opened with the web browser, in my case vivaldi. With Control+U i switched to the source. Searching for the HUGO inside the source, i found the lines...

var texts = [{"color": "#000000", "fontSize": 14.0, "fontFamily": ["monospace"], "fontStyle": "normal", "fontWeight": "normal", "opacity": 1.0, "text": "test start\nHUGO\\n\ntest add", "x": 1.0, "y": 1.0, "z": 1.0}];
for ( var i=0 ; i < texts.length ; i++ ) addText( texts[i] );

function addText( json ) {
    var sprite = addLabel( json.text, a[0]*json.x, a[1]*json.y, a[2]*json.z, json );
    sprite.userData = json;
}

And the js function addLabel works on the text as it randomly likes to do it.