Topic: Triangulation (re-visited)

[Lee Mac]

to err is human.

to forgive, divine.
- Alexander Pope

One of my favourite quotes 

[pedroantonio]

Hi ymg . Is it possible to update the profile to support two terrain models.
For example i have measure this month an area and i have one terrain model with some section. After 5 months i measure the same area  and i want to calculate the volume of the
 fill and cut .In that case i have to update the same sections with a second line with new elevetions .(Draw one section first and then use the command to superimpose a second section.)


* * *  All this must be better if we have cross sections ,no length sections !!!!

Thansks

[ymg]

topographer,

It is possible and planned at some point in the future.

I have in mind to implement extraction of Cross-Sections.  Idea would be to select the Alignment, select how long the section should be and at which interval,  then let it go.

If you extract the same Alignment from two different TINS, you could overlap the sections.

Right now, you can extract the same profile from two tins in the same drawing.  This is why
every TIN has a name, which correspond to the layer where it is kept.

Volumetry directly from the TINS, is also planned.  You probably saw a few post back some exchanges of ideas that I had with Marko Ribar on the subject.

This being said, this thing is a some sort of a toy to me.  I don't intend to put it up for sale and I certainly don't believe that it can be a replacement for C3D.  This is more like an educationnal undertaking.

So don't hold your breath for the above they may or may not come.

ymg

[ymg]

to forgive, divine.
- Alexander Pope

I must be very human, I err a lot! 

ymg

[ymg]

Here, I've added 3D Polyline as linear entity.

The goal eventually is to turn them into alignment, complete with Vertical Curves, Horizontal Curves and/or Spiral Curves and be able to extract a profile under it.

Also corrected a few bugs and cleaned up the code a bit in c:prof.

There are some tiny change to the c:prof Dialog Box so do not forget to erase "tin.dcl" in your temp directory.

ymg

[sanju2323]

ymg, need to improve profile datum. Ex. Datum should be Roundup and Datum Value starts above 2 meters.

[ymg]

sanju,

In the dialog box, there is an entry for elevation minimum.

As it opens it tells you the min and max of your Z data,
you enter in the min box the datum you want.  Say in the
case of your example al you have to do is enter 200 in that
edit box.

I use to calculate it, but very often you still need to change
because you want to be able to align two different profiles.

ymg

[sanju2323]

ymg,
        You are right, I understand where my mistake. Thank you very much for Guidance.

[ymg]

sanju,

There is no right or wrong here.

It is simply a design choice.  I like to see the real minimum and maximum of the data
on opening the dialog.

What you proposed is also a possibility, but would need to add the real min and max
to the DCL, and I find it already a little too cluttered.

ymg

[sanju2323]

ymg,
    is that possible to generate multiple cross section (profile) selected polylines.

[ymg]

Sanju,

Yes, It is possible and planned at one point.

However, to be really useful Cross-Sections need to be related
to a real Alignment not a simple polyline.

As you extract Cross-Sections you normally wants to relate them
to a standard section or at the very least to the elevation of the
reference Axis.

Working! on it.

ymg

[ymg]

Here new Revision 0.6.4.0

Done some change in the c:prof command.

If you enter 0 or a Negative Number in the Horizontal Increment edit box,
the profile will be generated at each intersections with 3DFACES.

I've also implemented (As per Sanju's request) automatic extent and increment
for the Graph of the profile.

The real spread of the Z data gets printed on the command line just before
opening the DCL.

ymg

[sanju2323]

ymg,
      I have a sample file attachment standard format. You can add additional detail your own profile belongs it.

[ymg]

Sanju,

Yes, there are many styles of profiles.

Personnally, I dislike grids, they simply add clutter.
The distance band also does not add much information.
Don't like either the many colors of Text, (Christmas Tree Syndrome).

Only thing, I might add is a vertical tick bar on the left.
And more important than this, either symbol or text showing
the location of TC's and CT's. Same for spirals or Vertical curves
when present.  Some do it in a band, not sure I like it either.

This being said, we could implement a ton of options for the
style of the profile, as all necessary calculation are there.

We would need a popup dialog to choose these options, as the
one for basic profile is already cluttered.

Not planning on doing it soon.

ymg

[ribarm]

ymg, I've found some issues with TriangV0.6.4.0.lsp... If you can look into gif, I've marked my revisions... I'll attach my mod, but if someone sees some more things, please let us know...

M.R.