Is there any reactor or jig to bind texts to UCS View mode even i rotate 3d wireframes model with 3DOrbit command?

[SanjoyNath]

Dear Experts,

I have made a 3D wireframe with line diagram (in Autocad). Isometric  2D like view could not help.

Then I placed the texts  with UCS V (snapped with equal distances from the end points of lines and with the mid points of the lines when the lines looks good for printing)

When i rotate the line framed (3D wireframe model) with 3D Orbit , then all texts become odd and some are readable and others are not readable at all.

Is there any intelligent command or lisp reactor or jig like thing which will automatically place the texts(auto update texts faces) to UCS V (whichever is looking at me) instead of the ucs (due to 3D orbits current states) ?

[john.uhden]

Somewhere in my archives is a reactor to include "attached" objects to any command.

By "attached" I mean I have stored the handle of the labels in the extension dictionary of the objects being modified.

With that method you can probably also 3DRotate the labels without having selected them.  Of course you may have to alter the labels to be readable, maybe having to change their normal.  I dunno; I don't do 3D stuff.

[Sea-Haven]

Rotating text in 3d changes 3 dxf codes 10 11 and 210. That is about as far as I got. 

[john.uhden]

@Anonymous_Haven
That makes perfect sense.

[hak_vz]

Yes @Sea-Haven  is on right path. Apart from codes 10 11 and 210 we have codes 71 72 73. For transformation to work we need middle center justified text.  There is also system variable viewdir. When in normal (top) view and without any changes it it set to '(0 0 1) i.e. unit vector in z direction. With slight change it can change to something like (-845.725 2179.38 6326.21). On the other hand 210 is unit vector. In point transformation we have world, user and display coordinate systems. Playing with this values can lead to solution.

[Sea-Haven]

I know someone wanted corner levels for buildings using COGO points same sort of problem the quick and dirty was to rotate3d text and stand it up to match in this case elevations and use layers for each elevation text.