| Name | OpenVCAD JSON |
| Version |
2.2.0
JSON |
| download |
| home_page | None |
| Summary | Python bindings for OpenVCAD (pyvcad, pyvcad, pyvcadviz) |
| upload_time | 2025-07-08 15:51:48 |
| maintainer | None |
| docs_url | None |
| author | None |
| requires_python | >=3.7 |
| license | Copyright © 2025 The Regents of the University of Colorado, a body corporate.
All Rights Reserved. Contact charles.wade@colorado.edu with any questions or
comments.
-------------------------------------------------------------------------------
The Program is the property of The Regents of the University of Colorado, a
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| keywords |
3d printing
cad
multi-material
volumetric
csg
geometry
3d
|
| VCS |
|
| bugtrack_url |
|
| requirements |
No requirements were recorded.
|
| Travis-CI |
No Travis.
|
| coveralls test coverage |
No coveralls.
|
# OpenVCAD
> Learn more about the OpenVCAD project at <https://matterassembly.org/openvcad>.
OpenVCAD is an open-source volumetric **multi-material geometry compiler** that bridges the gap between modern multi-material 3D-printing capabilities and computer-aided design (CAD) tools. It enables designers to create objects with complex material distributions for applications such as lattices, meta-materials, medical-image printing, and robotics.
---
## How OpenVCAD Works
1. **Modeling** – Use the `pyvcad` Python package to create a hierarchical tree of geometry + material nodes.
2. **Compilation** – Run an OpenVCAD compiler module to convert the model into volumetric data.
3. **Export** – Output formats include PNG stacks for inkjet printing, FEA meshes for simulation, and meshes for FFF printing.
Key capabilities:
- **Material transitions** – Gradual changes in material properties within one object.
- **Fully implicit representation** – Geometry *and* material are expressed implicitly, scaling to hundreds of billions of voxels.
- **Digital alloying** – Combine materials at a fine scale for intricate compositions.
- **Blending** – Convolution-based smoothing across complex material interfaces.
- **Image-based processing** – Drive material distributions from images (e.g., medical scans).
---
## Supported Inputs
| **Category** | **Supported Inputs** |
|--------------|----------------------|
| **Geometry** | • Meshes <br>• STEP CAD files <br>• FEA simulation results <br>• DICOM medical scans <br>• Implicit surfaces <br>• Voxels (OpenVDB, NanoVDB) |
| **Materials**| • Math expressions <br>• Custom C++ / Python functions <br>• Blending <br>• DICOM medical scans <br>• Voxels (OpenVDB, NanoVDB) |
---
## Supported Outputs
| **Category** | **Output Types** |
|-----------------------|------------------|
| **3D Printing** | PNG stacks (inkjet) |
| **Simulation** | FEA input files with material assignments (ABAQUS) |
| **Voxel-based Outputs**| Voxel grids (OpenVDB, NanoVDB) |
| **Visualization** | Surface and volumetric previews |
---
## Getting Started
The code below shows how you can create a basic OpenVCAD design, render it, and export a PNG stack for Inkjet 3D Printing.
```python
import pyvcad as pv
import pyvcad_compilers as pvc
import pyvcadviz as viz
# Load some material definitions
materials = pv.default_materials
red = materials.id("red")
green = materials.id("green")
liquid = materials.id("liquid")
# Create pyvcad object
radius = 5
center = pv.Vec3(0,0,0)
sphere = pv.Sphere(center, radius, liquid)
# Render the object, note that this is a blocking call and will not continue until the window is closed
viz.Render(root=sphere, material_defs=materials, use_darkmode=True)
# Export a PNG stack
voxel_size = pv.Vec3(0.1,0.1,0.1) # This is mm. Use (0.0423, 0.0846, 0.027) for the J750
output_directory = "png_stack_output"
file_prefix = "my_stack_"
use_liquid_keepout = False
liquid_keepout_distance = 0
png_exporter = pvc.DirectMaterialCompiler(sphere, voxel_size, materials, output_directory, file_prefix, use_liquid_keepout, liquid_keepout_distance)
png_exporter.compile()
```
---
## Examples
You can download a ZIP file containing more examples [here](https://o365coloradoedu-my.sharepoint.com/:u:/g/personal/maccurdy_colorado_edu/EREhMep4JgJArrNZNwIhnY0Brcu1kjzu7cpE5C-YstwtlA?e=9JeB37). Note that these examples just provide object definitions. You will need to add the follow snipped to render:
```python
import pyvcadviz as viz
# --- Demo object here ---
viz.Render(root=root, material_defs=materials, use_darkmode=True)
```
---
## Issues
If you run into any issues, please submit a report [here](https://github.com/MacCurdyLab/OpenVCAD-Public/issues).
> Note: Currently we only support Windows. We hope to release Linux and Mac binaries soon.
---
## Source Code
We hope to release the source code soon!
---
## What OpenVCAD **Is Not**
OpenVCAD is **not** a voxel-by-voxel design tool. While it can emit voxel data, design is done implicitly with high-level math expressions that scale to extremely large builds (e.g. Inkjet 3D printing).
---
## Academic Papers
1. **“OpenVCAD: An open-source volumetric multi-material geometry compiler.”**
*Additive Manufacturing* (2023). DOI: 10.1016/j.addma.2023.103912 — [Pre-print PDF](https://matterassembly.org/assets/pdf/preprints/2024_OpenVCAD.pdf)
2. **“Implicit Toolpath Generation for Functionally Graded Additive Manufacturing via Gradient-Aware Slicing.”**
[arXiv pre-print](https://arxiv.org/abs/2505.08093)
---
Raw data
{
"_id": null,
"home_page": null,
"name": "OpenVCAD",
"maintainer": null,
"docs_url": null,
"requires_python": ">=3.7",
"maintainer_email": null,
"keywords": "3D printing, CAD, multi-material, volumetric, CSG, geometry, 3D",
"author": null,
"author_email": "Charles Wade <charles.wade@colorado.edu>, Robert MacCurdy <maccurdy@colorado.edu>",
"download_url": null,
"platform": null,
"description": "# OpenVCAD\n \n> Learn more about the OpenVCAD project at <https://matterassembly.org/openvcad>.\n\nOpenVCAD is an open-source volumetric **multi-material geometry compiler** that bridges the gap between modern multi-material 3D-printing capabilities and computer-aided design (CAD) tools. It enables designers to create objects with complex material distributions for applications such as lattices, meta-materials, medical-image printing, and robotics.\n\n---\n\n## How OpenVCAD Works\n\n1. **Modeling** \u2013 Use the `pyvcad` Python package to create a hierarchical tree of geometry + material nodes.\n2. **Compilation** \u2013 Run an OpenVCAD compiler module to convert the model into volumetric data.\n3. **Export** \u2013 Output formats include PNG stacks for inkjet printing, FEA meshes for simulation, and meshes for FFF printing.\n\nKey capabilities:\n\n- **Material transitions** \u2013 Gradual changes in material properties within one object.\n- **Fully implicit representation** \u2013 Geometry *and* material are expressed implicitly, scaling to hundreds of billions of voxels.\n- **Digital alloying** \u2013 Combine materials at a fine scale for intricate compositions.\n- **Blending** \u2013 Convolution-based smoothing across complex material interfaces.\n- **Image-based processing** \u2013 Drive material distributions from images (e.g., medical scans).\n\n---\n\n## Supported Inputs\n\n| **Category** | **Supported Inputs** |\n|--------------|----------------------|\n| **Geometry** | \u2022 Meshes <br>\u2022 STEP CAD files <br>\u2022 FEA simulation results <br>\u2022 DICOM medical scans <br>\u2022 Implicit surfaces <br>\u2022 Voxels (OpenVDB, NanoVDB) |\n| **Materials**| \u2022 Math expressions <br>\u2022 Custom C++ / Python functions <br>\u2022 Blending <br>\u2022 DICOM medical scans <br>\u2022 Voxels (OpenVDB, NanoVDB) |\n\n---\n\n## Supported Outputs\n\n| **Category** | **Output Types** |\n|-----------------------|------------------|\n| **3D Printing** | PNG stacks (inkjet) |\n| **Simulation** | FEA input files with material assignments (ABAQUS) |\n| **Voxel-based Outputs**| Voxel grids (OpenVDB, NanoVDB) |\n| **Visualization** | Surface and volumetric previews |\n\n---\n## Getting Started\nThe code below shows how you can create a basic OpenVCAD design, render it, and export a PNG stack for Inkjet 3D Printing.\n```python\nimport pyvcad as pv\nimport pyvcad_compilers as pvc\nimport pyvcadviz as viz\n\n# Load some material definitions\nmaterials = pv.default_materials\nred = materials.id(\"red\")\ngreen = materials.id(\"green\")\nliquid = materials.id(\"liquid\")\n\n# Create pyvcad object\nradius = 5\ncenter = pv.Vec3(0,0,0)\nsphere = pv.Sphere(center, radius, liquid)\n\n# Render the object, note that this is a blocking call and will not continue until the window is closed\nviz.Render(root=sphere, material_defs=materials, use_darkmode=True)\n\n# Export a PNG stack\nvoxel_size = pv.Vec3(0.1,0.1,0.1) # This is mm. Use (0.0423, 0.0846, 0.027) for the J750\noutput_directory = \"png_stack_output\"\nfile_prefix = \"my_stack_\"\nuse_liquid_keepout = False\nliquid_keepout_distance = 0\n\npng_exporter = pvc.DirectMaterialCompiler(sphere, voxel_size, materials, output_directory, file_prefix, use_liquid_keepout, liquid_keepout_distance)\npng_exporter.compile()\n```\n\n---\n## Examples\nYou can download a ZIP file containing more examples [here](https://o365coloradoedu-my.sharepoint.com/:u:/g/personal/maccurdy_colorado_edu/EREhMep4JgJArrNZNwIhnY0Brcu1kjzu7cpE5C-YstwtlA?e=9JeB37). Note that these examples just provide object definitions. You will need to add the follow snipped to render:\n```python\nimport pyvcadviz as viz\n\n# --- Demo object here ---\n\nviz.Render(root=root, material_defs=materials, use_darkmode=True)\n```\n\n---\n## Issues\nIf you run into any issues, please submit a report [here](https://github.com/MacCurdyLab/OpenVCAD-Public/issues).\n> Note: Currently we only support Windows. We hope to release Linux and Mac binaries soon.\n\n---\n\n## Source Code\nWe hope to release the source code soon!\n\n---\n\n## What OpenVCAD **Is Not**\n\nOpenVCAD is **not** a voxel-by-voxel design tool. While it can emit voxel data, design is done implicitly with high-level math expressions that scale to extremely large builds (e.g. Inkjet 3D printing).\n\n---\n\n## Academic Papers\n\n1. **\u201cOpenVCAD: An open-source volumetric multi-material geometry compiler.\u201d** \n *Additive Manufacturing* (2023). DOI: 10.1016/j.addma.2023.103912 \u2014 [Pre-print PDF](https://matterassembly.org/assets/pdf/preprints/2024_OpenVCAD.pdf)\n\n2. **\u201cImplicit Toolpath Generation for Functionally Graded Additive Manufacturing via Gradient-Aware Slicing.\u201d** \n [arXiv pre-print](https://arxiv.org/abs/2505.08093)\n\n---\n",
"bugtrack_url": null,
"license": "Copyright \u00a9 2025 The Regents of the University of Colorado, a body corporate.\n All Rights Reserved. Contact charles.wade@colorado.edu with any questions or\n comments.\n -------------------------------------------------------------------------------\n \n The Program is the property of The Regents of the University of Colorado, a\n body corporate, (CU or the University). CU hereby reserves all rights in the\n Program (defined below) not expressly granted herein. In addition to being\n subject to copyright protection, the use of this Program is covered by a\n pending patent application. Any use, copy, publication, distribution, display,\n modification, or transmission of the Program in whole or in part in any form or\n by any means outside the rights expressly granted in this Notice without the\n written permission of CU is strictly prohibited.\n \n The Program consists of the computer software code known as \u201cSystems and\n Processes for Volumetric Multi-Material 3D Models\u201d also known as \u201cOpenVCAD\u201d,\n \u201cVCAD\u201d or similar, and the associated documentation, for making volumetric\n multi-material 3D models.\n \n You (the user or recipient of the Program) desire to acquire a license to use\n the Program in accordance with the terms set forth in this Notice.\n \n BY DOWNLOADING AND USING THIS PROGRAM, IN WHOLE OR IN PART, YOU AGREE TO COMPLY\n WITH AND BE BOUND BY ALL TERMS IN THIS NOTICE. THE TERMS OF THIS NOTICE ALSO\n APPLY TO ALL YOUR CONTRIBUTIONS (DEFINED BELOW). IN RETURN, THE UNIVERSITY\n AGREES THAT IT SHALL NOT USE YOUR CONTRIBUTIONS IN A WAY THAT THE UNIVERSITY\n BELIEVES IS CONTRARY TO THE PUBLIC BENEFIT. IF YOU DO NOT WISH TO COMPLY WITH\n OR BE BOUND WITH THE TERMS OF THIS NOTICE YOU MUST IMMEDIATELY CEASE USE OF THE\n PROGRAM AND DELETE ALL COPIES OR MODIFICATIONS OF THE PROGRAM COMPLETELY. If\n You agree to these terms on behalf of an organization, You hereby represent to\n CU that You are authorized to accept these terms on its behalf.\n \n 1.\tDefinitions:\n \u201cContributor\u201d means the copyright owner or legal entity authorized by the\n copyright owner of any Contribution (defined below) submitted to the\n University. For legal entities, the entity making a Contribution and all\n other entities that control, are controlled by, or are under common control\n with that entity are considered to be a single Contributor. 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To the extent that You publish any results from the\n use of the Program or derivative works of the Program, You must properly\n acknowledge the Program as developed by the Matter Assembly Computation Lab\n at the University of Colorado Boulder, and cite the published reference(s).\n The recommended reference citation(s) for the Program is/are provided in\n the Program documentation. This Notice is limited to the rights of The\n Regents of the University of Colorado in the Program and does not include\n any rights to other intellectual property. Your rights under this Notice\n will terminate immediately and automatically if You fail to comply with any\n of the terms and conditions of this Notice. Immediately upon termination,\n You must cease all use of the Program and any derivative works of the\n Program, destroy all copies of the Program and any derivative works of the\n Program in Your possession or control. 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