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Nagarajan Thiyagarajan (tnagarajan)
New member
Username: tnagarajan

Post Number: 1
Registered: 04-2005
Posted on Friday, April 22, 2005 - 09:23 am:   

Hi,
I am running a 3D model and want to extract data along a curved path. Right now I am using the elevation command and the only option for 3D problem is enter the x, y and z co-ordinates of the start and the end point. How do I do it for a curved path?
Nagarajan
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Robert Thode (rct130)
New member
Username: rct130

Post Number: 2
Registered: 11-2003
Posted on Friday, April 22, 2005 - 12:55 pm:   

Try building your curved path using a combination of arcs and line segments using the ARC option. See paths and path names in the help file.

start 'pathname' (78,62)
arc (center=80,62) angle=63

Then specify the pathname for the elvation plot instead of the x,y, z coordinates, something like:

elevation(u) ON 'pathname'

Hope that helps,

Rob Thode
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Robert G. Nelson (rgnelson)
Moderator
Username: rgnelson

Post Number: 352
Registered: 06-2003
Posted on Friday, April 22, 2005 - 03:21 pm:   

You will only be able to do this on extrusion surfaces, and you should use a second "ON" to specify the surface:

elevation(u) ON 'pathname' ON SURFACE 2

or

elevation(u) ON 'pathname' ON 'surfacename'
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Douglas Tasker (anchoman)
New member
Username: anchoman

Post Number: 1
Registered: 04-2008
Posted on Tuesday, April 22, 2008 - 06:32 pm:   

Greetings

I am also trying to use Elevation to plot data along a curved path in 3D. In the statement below 'Lower electrode profile' represents an extruded surface in a Limited Region; the Z value is just above that region:

Elevation (Ex, Ey, Ez) on 'Lower electrode profile' on Z = (Z2+Z3)/2

As soon as this Elevation statement is reached in the Monitor section, all previous graphical plots disappear and I get the error "3D Boundary Trace Not Implemented."

Elevation statements along straight lines work just fine:

Elevation (Ex, Ey, Ez) from (-W2, WingRadY, (Z2+Z3)/2) to (W2, WingRadY, (Z2+Z3)/2)

All help would be greatly appreciated.
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Robert G. Nelson (rgnelson)
Moderator
Username: rgnelson

Post Number: 1108
Registered: 06-2003
Posted on Wednesday, April 23, 2008 - 03:27 pm:   

Elevations on boundary curves were not initially implemented in 3D, and we forgot to do it later.

I will look into correcting this oversight.

Unfortunately, I know of no workaround to this problem.
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Robert G. Nelson (rgnelson)
Moderator
Username: rgnelson

Post Number: 1113
Registered: 06-2003
Posted on Tuesday, April 29, 2008 - 12:38 am:   

We have implemented ELEVATION plots on boundary curves in 3D.
The development version for Windows/32 is available from www.pdesolutions.com/buglist5.html

The plot must be on an extrusion Surface, not in open space. Use the ON SURFACE "name" qualifier to specify the surface for the desired plot.

ON REGION and ON LAYER qualifiers have not yet been tested.

The ELEVATION will be plotted on the first boundary that satisfies the selection criteria, so if you do not specify a surface, you will get the first surface in which the boundary is active (LIMITED qualifiers may be also used to make the selection unique)

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