CAD Assistant

4.3
3.22K reviews
500K+
Downloads
Content rating
Everyone
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About this app

OPEN CASCADE CAD Assistant for Android is an offline viewer and converter for 3D CAD and mesh models.

If you wish to use this technology for development of customized solutions for your business, contact us at:
https://dev.opencascade.org/webform/contact_us

Basic CAD model viewing and converting

Basic functionality is provided by CAD Data Exchange component of Open CASCADE Technology (OCCT).
The supported file formats and data are:
- BREP: native OCCT format for shape geometry, topology, and assembly structure.
- IGES (5.1 and 5.3): shape geometry, colors, top-level object names, file information.
- STEP (AP203 and AP214): shape geometry, assembly structure, colors, names, validation properties, file information.

Assembly structure of the model can be navigated through the tree browser. The components of the assembly can be hidden or shown as necessary to inspect the model. The selected sub-assembly or part can be queried for its properties.

CAD model (whole or selected part or sub-assembly) can be exported to any of supported CAD or mesh formats.

Viewing mesh data

Additional functionality is viewing of mesh models with associated data, implemented using the mesh visualization component of OCCT.

Supported mesh formats are:
- glTF is an open standard for 3D assets.
- STL is de-facto standard in 3D printing.
- PLY has capability to store data associated with mesh nodes and elements. If you have in your application a model represented by mesh, it can be saved easily to PLY format and viewed on a tablet. Additional data (RGB color or scalar) can be added to each polygon or node.
- OBJ is standard for 3D animation and supported by most 3D graphics applications.
- JT is ISO standard for efficient visualization of 3D CAD data.

CAD Assistant allows you to view the mesh in wireframe, shaded, and shrink view. If mesh contains associated textures, colors, or scalar data, it can be viewed with elements colored according to the selected property. For scalar quantities interactive color scale is shown, providing controls to manipulate the range of displayed quantities.

Common operations

CAD Assistant for Android is optimized for devices with multi-touch screen and provides intuitive manipulation of the 3D view by finger gestures.

Left toolbar provides buttons for fitting model to window and choice of standard views. Settings submenu provides access to viewer and application options, file information, and message log.

Files can be opened from local storage (internal memory or SD card). CAD Assistant integrates with Android so that applications supporting file associations will launch it for opening files of relevant types. For instance, you can open STEP file sent to you by mail by simple click on attachment in mail client.

CAD models can be saved in STEP, IGES, or BREP format as CAD data; CAD and mesh models can be saved in PLY, STL, or OBJ format as polygonal data. Save file dialog also allows saving current image of the model to PNG format. If target directory Mail is selected, the mail client will be automatically started with saved file as attachment.

Supported devices

CAD Assistant has been tested to work on a wide range of modern tablets and smartphones. Note however that it is optimized for landscape screen orientation, which might be inconvenient on phones.

Application requires OpenGL ES 3.0+.

Limitations

Depending on a device, opening large files may take time. Devices with low-range graphic processor could be slow on displaying large models, and system might (silently) close application if model requires more memory than available on device.

See more at https://www.opencascade.com/content/cad-assistant

Feedback

We welcome your feedback on Google Play or on our User Forum at https://dev.opencascade.org/forums/open-cascade-applications
Updated on
Oct 6, 2021

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection

Ratings and reviews

4.3
3.02K reviews
Rudy TheCat
April 9, 2022
While opening and viewing .obj models is easy, the images themselves are lacking detail and the colors are washed out. I do like the lighting control whjch changes the effect of various light angles. Imo there are just too many settings options without explanation as to their use, and I still can't get a sharp display with acceptable texture rendering (when I have a texture map).
68 people found this review helpful
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Steve Thompson
January 14, 2024
This is a very good app for viewing STL files for 3D Printing. Its also great to use the Section View to see the interior of models. I was wondering if there was any chance of adding support for 3mf files from Bambu Labs printers and slicer? It would then also work with OrcaSlicer 3mf files too. Many example files are on the BL MakerWorld web site. Thanks for a great app!
5 people found this review helpful
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Obaid Mohiuddin
February 21, 2023
One of the best app for android tablets. There is only one issue though, when you change to half section view, you can nott differentiate in different material and can not even see the connection edges of different material(where one ends and other starts), it looks like as if its one piece, instead of differentiating different individual parts for hald section view. would be nice if you can fix it.
29 people found this review helpful
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What's new

- Improved STEP, glTF, JT translators robustness.
- Added support for reading glTF files using Draco extension.
- Added interface for switching LODs.