# CMB 3D modeling

**URL:** https://discourse.kitware.com/t/cmb-3d-modeling/1254
**Category:** Computational Model Builder (CMB)
**Created:** [March 18, 2024, 8:24pm UTC](https://discourse.kitware.com/t/cmb-3d-modeling/1254 "2024-03-18T20:24:02Z")
**Posts on this page:** 1
**Showing post:** 3

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### Author: ![johnt](https://discourse.kitware.com/user_avatar/discourse.kitware.com/johnt/32/147_2.png) [@johnt](https://discourse.kitware.com/u/johnt)
#### Post date: [March 18, 2024, 9:33pm UTC](https://discourse.kitware.com/t/cmb-3d-modeling/1254/3 "2024-03-18T21:33:27Z")

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Regarding building your own customized version of modelbuilder, you first need to build from source code.

- The starting point is the cmb-superbuild. The web page is [https://gitlab.kitware.com/cmb/cmb-superbuild](https://gitlab.kitware.com/cmb/cmb-superbuild), which is used to build all of the dependent libraries. I am pretty sure you can pull the source without an account on our gitlab server.
- Check the README.md for general requirements: cmake, ninja, gcc are the big ones. Ubuntu has a build-essential package that should have most or all of what you need.
- Don’t install Qt from the ubuntu packages, but instead get the installer from Qt’s community page: [Open Source Development | Open Source License | Qt](https://www.qt.io/download-open-source). Go to that page and scroll down to find a green button labeled “Download the Qt Online Installer”. When you run that, you **will** need to create a (free) account with Qt before it will let you install.
- When you get to the part where you can select what to install, open the “Qt” item, open its child item “Qt 5.15.2” and select “Desktop gcc 64-bit”. And unselected everything else, otherwise you will download a huge amount of other stuff you won’t need.
- I might be getting ahead of things, but when you are ready to run cmake, be sure to set both `DEVELOPER_MODE_cmb` and `DEVELOPER_MODE_smtk` to `ON`. You’ll also need to set `Qt5_DIR` to point to your installed Qt.

That’s alot and we’re not done yet. Ping me back if you get stuck or when you are ready to build cmb-superbuild.

(Note: this was copied from [Struggle to get the windtunnel modelbuilder running properly - #20 by johnt](https://discourse.kitware.com/t/struggle-to-get-the-windtunnel-modelbuilder-running-properly/1230/20))

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