Issues with DTM point levels

[random_guy]

Hello,

 

my first post here.

 

Recently we have been trying to do some quantities on a project and are trying to start using C3D for this type of work. I've used it on a perevious project and it's worked well.

 

This time however the level of the DTM (both existing and new levels) comes in at a factor of 1000 too low. As an example, a level that should be 85.760 comes out as 0.086.

 

In order to create the DTM I used the convert from drawing objects option, the same as last time but I don't see any reason for this new scaling factor. The objects in question are blocks brought over from ACAD 2014.

 

I've searched through the options and I also don't see anything that would bring in the change.

 

Does anyone have any pearls of wisdom to share.

 

Regards,

[JerryG]

Welcome to the Forum RandomGuy!

 

When you bring in the Block how are you inserting them? Just cut and paste or are you selecting a

point/line etc to place them in the correct location? I'm assuming these are blocks of a surface or contour lines?

 

One possible way to correct it is once your surface is created - Raise or lower it as needed.

From the Help file......

 

1. In Toolspace, on the Prospector tab, expand the surface Definition collection, right-click , and click Raise/Lower Surface.The following prompt is displayed:
    
   Amount to add to all elevations:
    
   
2. Enter a positive value to raise the surface or a negative value to lower the surface.The surface is adjusted to the new elevation.
   The operation is added as a Raise/Lower operation to the Edits list view in the Prospector tree.
   NoteThe Description column in the Prospector list view displays the value by which the surface was raised or lowered.
    
    
   

[BIGAL]

Jerryg can not add height adjust as its a scale factor problem sounds like the blocks have incorrect Z to start or have their Z scale set to 0.001. A way around is export the surface model back to 3dfaces you can then modify all levels of the faces by * 1000 then make a new surface. This is a trick to make flat surfaces when viewed in 3d have hills and valleys.

 

Heres a couple of lines to get started will try to find time to complete & test

(defun triup ( / x y z xyz e3dface len ss3dfaces)
(setq icnt 0)
;(command "-layer" "n" "new3dfaces" "s" "new3dfaces" "") ;new layer if required

(setq ss3Dfaces (ssget "X" '((0 . "3DFACE"))))
(setq len (sslength ss3dfaces))

(repeat len
(setq e3dface (entget (ssname ss3Dfaces iCnt)))

(setq xyz (cdr (assoc 10 e3DFace)))
(setq x (nth 0 xyz))
(setq y (nth 1 xyz))
(setq z (* 1000.0 (nth 2 xyz)))
(setq pt1 (list x y z))

(setq xyz (cdr (assoc 11 e3DFace)))
(setq x (nth 0 xyz))
(setq y (nth 1 xyz))
(setq z (* 1000.0 (nth 2 xyz)))
(setq pt2 (list x y z))
            
(setq xyz (cdr (assoc 12 e3DFace)))
(setq x (nth 0 xyz))
(setq y (nth 1 xyz))
(setq z (* 1000.0 (nth 2 xyz)))
(setq pt3 (list x y z))



; now update 3dface or create new one pt1 pt2 pt3 pt4

(command "3dface" pt1 pt2 pt3 "" "")
(setq icnt (+ 1 icnt))
) ; repeat

) ; defun

(triup)

Edited April 26, 2014 by BIGAL

[rlshound]

Interesting BIGAL...Thanks

[BIGAL]

Fixed up code above to work properly with z*1000

[JerryG]

Ahh thanks Bigal - I misunderstood.

 

Would it not be a simple matter of just using the same insert point then and scaling up

the block by 1000? (Assuming he knows the insertion point)

[BIGAL]

Need a sample dwg to see whats going on. Random_guy your turn.