to use it in i.e. tecnomatix - siemens plm...

© Siemens PLM Software 2012. All Rights Reserved.

to use it in i.e. Tecnomatix

Siemens Industry Software

Weissacher Straße 11

70499 Stuttgart

Germany


How to?

This slide deck shows step by step, how to reduce a generic CAD file

without a loss of too many details

In: 175 MB Something.STEP

Out: 1.7 MB Something JTOptimize.jt


DirectModel (.jt)

The standard 3D file format is DirectModel (.jt). DirectModel files are

often referred to as JT files.

DirectModel or JT is a lightweight CAD-neutral 3D data format. You can

quickly load, navigate through, and analyze extremely complex JT

assemblies.

Typically, JT files are created from CAD files before you open the 3D

models in the viewer. 3D CAD models are translated from their native

CAD-specific formats to the CAD-neutral JT format. This is often done

automatically by a translator in the CAD system, or by a translator

external to the CAD system and the viewer.


JT Translators

Translators are available for all the major CAD systems.

When you translate a CAD

• model of a single part to JT, the result is one JT file.

• assembly to JT, there are several ways to save the various parts

and subassemblies:


Minimize 3D-Data 1/6

An application (i.e. Tecnomatix Plant

Simulation) shall handle several parts of

remarkable size for a Discrete Event

Simulation.

In order to maintain/increase the

performance it is mostly required to

reduce the amount of 3D data while

maintaining an appropriate 3D

representation.



Transforming the native CAD formats to

JT of course is the first and necessary

step.

But the amount of 3D data may remain

too high.



Using TC 9.1 LifeCycle Visualization

Mockup it is possible to furthermore

reduce the 3D data.



TC 9.1 LifeCycle Visualization Mockup provides four different procedures

to reduce the 3D data.

1. Visibility Filter most detailed representation of visible parts

least size reduction

2. Outer Shell simple representation of outer shell

no parts anymore, no closed surface

3. Swept Volume simple representation, no risk of leaking confident data

no parts anymore, color information went lost

4. JTOptimize best size reduction, detailed representation

command line tool

All can be used in combination. The slide deck will show them separately.

If you find more/better options any feedback is welcome!

mailto:[email protected]?subject=Minimize 3D-Data



File sizes achieved by the procedures:



Overview of the achieved graphical representations:

1. Visibility Filter

2. Outer Shell

3. Swept Volume

4. JTOptimize

1 2 3 4


General 1/5

• In TC 9.1 LifeCycle Visualization Mockup load the entire model • it is transformed to JT automatically

• it may take some time


General 2/5

• Export the entire model to create the JT file • because handling of a JT file is much faster than a native CAD file

• Close the native and open the JT file • The achieved JT file size should be < 30% of the native file size


General 3/5

• Activate the toolbars • 3D Navigation

• 3D Part Edit


General 4/5

• In the toolbar 3D Part Edit open Preferences • Switch off the Use „Off-Screen“-Rendering


General 5/5

From this point you may follow either:

1. Visibility Filter most details < 10%

2. Outer Shell good reduction < 5%

3. Swept Volume best anonymization < 5%

4. JTOptimize best reduction < 1%


Visibility Filter 1/2

• Open Actions/Filters… • Add a Visibility Filter with the settings below

• Set Properties as shown below too, press Ok

• Apply Filter, wait until finished, Close Filter


Visibility Filter 2/2

• Consider the selection in the tree view

• Do File/Export… (confirm second dialog) • The achieved JT file size should be < 10% of the native file size


Outer Shell 1/4

• In the toolbar 3D Part Edit open Visibility • Place the settings as shown below (Name: VisiblePart 1st Pass)

• Press Apply


Outer Shell 2/4

• In the tree view the node VisiblePart 1st Pass appears

• In Visibility • Place the settings as shown below (Name: VisiblePart 2nd Pass)

• Press ok


Outer Shell 3/4

• Consider the part appearance

• In the tree view highlight the newly created VisiblePart 2nd Pass



Outer Shell 4/4

• Up to now it was impossible to find an explanation for the need of

doing two passes

• If one tries to export the VisiblePart 1st Pass the JT file size may

even increase


Swept Volume 1/3

• Open Actions/Swept Volume/Preferences… • Set Preferences as shown below, press Ok


Swept Volume 2/3

• Open Actions/Swept Volume/Create… • Set Preferences as shown below, press Create


Swept Volume 3/3

• In the tree view show only the newly created SweptVolume



JTOptimize 1/2

• Run the command line application JTOptimize.exe which is

located in Visualization/Program of the TC installation folder • Use the parameters shown below in the cmd-window

• The achieved JT file size should be < 1% of the native file size


JTOptimize 2/2

• The representation quality can best be influenced by the option

low/medium/high/super

• For more options refer to jtoptimize.htm

This file may not be up to date (8.1 instead of 9.1)!

Don´t use the –u option anymore!


Contact

• [email protected]

• +49 160 9045 0464

Any feedback is welcome!

mailto:[email protected]

mailto:[email protected]?subject=Minimize 3D-Data

to use it in i.e. tecnomatix - siemens plm...

Documents