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
- Improved STEP, glTF, JT translators robustness.
- Added support for reading glTF files using Draco extension.
- Added interface for switching LODs.
- Improved progress indication.
- Improved metadata handling in JT and IFC readers.
- Improved STEP reader/writer robustness and UNICODE support.
- Added new highlighting styles.
- Improved progress indication.
- Improved metadata handling in JT and IFC readers.
- Improved STEP reader/writer robustness and UNICODE support.
- Added new highlighting styles.
- Introduced material editor.
- Assembly properties window now displays metadata.
- Added optional PBR Metallic-Roughness rendering mode.
- Improved performance of OBJ and STL readers.
- Improved compatibility with SpaceMouse (Windows).
- New cad import format (XT) using OCC Commercial Component.
- Improved perspective camera manipulations.
- Improved Hollow Mesh/Mesh Edges presentations.
- Improved performance of some operations on large assemblies.
- glTF reader now supports files with embedded textures.
- Added portrait mode and fixed resizing issues.
- New Open CASCADE logo.
- glTF writer now exports into 2.0 version of this format.
- Option to rename selected assembly part.
- Improved performance of Flat Shaded and Mesh Shrinked presentation modes.
- Improved robustness of dimensions import from STEP file.
- Fixed remaining issues with stylus input within Model Browser and Display Modes on Android platform.
- Fixed applying length units while reading VRML 2.0 files.
- glTF writer now exports into 2.0 version of this format.
- Option to rename selected assembly part.
- Improved performance of Flat Shaded and Mesh Shrinked presentation modes.
- Improved robustness of dimensions import from STEP file.
- Fixed remaining issues with stylus input within Model Browser and Display Modes on Android platform.
- Fixed applying length units while reading VRML 2.0 files.
- New languages for user interface: French, Russian.
- New cad import formats (DXF, ACIS) using OCC Commercial Components.
- New mesh import formats (WRL1, BLEND, 3MF, 3DM, 3DS, AC3D, AMF, ASE, COLLADA, X3D).
- Dimensions and tolerances information stored in STEP file is now displayed in 3D Viewer.
- Improved compatibility (file sharing issues) with several applications / file formats.
- Improved stability while reading OBJ and JT files.
- Improved support of measurement units.- Rubber-band selection tool.- Option to export into Binary glTF 1.0 format.- Option to exclude normals when exporting to PLY.- Fixed reading some glTF 2.0 models - byteOffset is now optional.- OBJ file import compatibility improvements.- OBJ file export bug-fixes (random failures saving MTL file).- Fixed handling of transformations and colors assigned to root elements and part instances in the document.- Fixed stylus input on Samsung tablets.
- JT mesh import (without LODs).- Option to import multiple models into single document.- Assembly structure is now displayed also for mesh-only files.- Improved performance while displaying big assemblies.- Improved glTF mesh format support.- Support of polygons with more then 4 nodes within mesh import.- Option to control nodes merging for STL mesh import.- Option to rotate around picked point.- Option to use shaded mode for highlighting selected object.
