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Parametric Modeling
Create 2D sketches, surfaces, and solids with construction history and variables.
PolyNURBS
Create free-form solid geometry that is smooth and continuous.
Fit
Use the Fit tool to automatically create a new PolyNURBS part on top of existing geometry.

Welcome
What's New
Discover new features and enhancements.
Get Started
New to Inspire Cast? Learn the basics here.
Tutorials
Learn to use Inspire Cast with our interactive tutorials.
Parametric Modeling
Create 2D sketches, surfaces, and solids with construction history and variables.
- Construction History
  View and edit the construction history of your model.
- Global References
  Global references are the global origin, axes, and planes shown in the modeling window. They can be helpful when creating and defining your model.
- Sketching
  Create and edit 2D parametric sketch geometry.
- Geometry
  Create and modify parametric surfaces and solids.
- PolyNURBS
  Create free-form solid geometry that is smooth and continuous.
  - Editing PolyNURBS
    Edit vertices, edges, and faces to modify the shape of a PolyNURBS object.
  - Primitive
    Use the Primitive tools to create a single PolyNURBS solid or surface, either around a selected object or as the starting point for a new model. This is the tool you should start with if you want to build PolyNURBS geometry without wrapping or paving.
  - Fit
    Use the Fit tool to automatically create a new PolyNURBS part on top of existing geometry.
  - Wrap
    Use the Wrap tool to quickly wrap a PolyNURBS solid around an optimized shape. You can create multiple PolyNURBS cages, and bridge the face of one cage to another. You can also wrap a hole or negative space.
  - Pave
    Use the Pave tool to create faces manually on an existing object.
  - Move Bodies
    Use the Move Bodies tool to translate, rotate, or align PolyNURBS bodies.
  - Mirror Bodies
    Use the Mirror Bodies tool to mirror PolyNURBS bodies across a symmetry plane.
  - Add/Remove (+/-)
    Use the Add(+) and Remove(-) tools to modify an existing PolyNURBS cage by adding or removing blocks. This allows you to quickly build the basic shape of a PolyNURBS object.
  - Split
    Use the Split tools to split a cage with a loop or split a single PolyNURBS cage face.
  - Bridge
    Use the Bridge tool to create a bridge between two or more faces of either the same PolyNURBS cage or different cages.
  - Sharpen
    Use the Sharpen tool to control sharpness along the edges of a PolyNURBS. Four levels of sharpness are available, and you can set the sharpening factor manually or automatically.
  - Repair
    Use the Repair tool to close a hole in a PolyNURBS cage.
  - Offset/Shell
    Use the Shell tool to remove the cage face and create thin walls to generate a shelled PolyNURBS part.
  - Shape Variable
    Use the Shape Variable tool to define which directions PolyNURBS cage points can move during PolyNURBS optimization.
  - Subdivision Surface
    Convert a PolyNURBS part to a subdivision surface for faster exit from PolyNURBS tools.
Model Setup
Designate casting parts, gravity direction, gates, and components.
Cast Analysis
Run a casting analysis to minimize defects and prevent manufacturing problems.
Casting Benchmark Manual
Download the Casting Benchmark Manual to learn more about benchmark and verification tests.
Intellectual Property Rights Notice
Copyright © 1986-2024 Altair Engineering Inc. All Rights Reserved.
Technical Support
Altair provides comprehensive software support via web FAQs, tutorials, training classes, telephone, and e-mail.

Fit

Use the Fit tool to automatically create a new PolyNURBS part on top of existing geometry.

On the PolyNURBS ribbon, select the Fit tool.
Select one or more parts to fit. Hold the Ctrl key or use box selection to select multiple parts. If you select more than one part, they will be combined into a single fit part.
Optional: Select the icon on the guide bar to specify the Number of PolyNURBS Faces (default is 2500), Curvature (default is 50%), and whether to use Auto Creasing (default is No).
Click Apply on the guide bar .
Right-click and mouse through the check mark to exit, or double-right-click.

Tip:

While this tool is intended to be used on faceted STL geometry, you can fit over any geometry.
Reducing the Number of PolyNURBS Faces will increase the size of the PolyNURBS cages, but will capture less detail. In general, you want to use the fewest number of PolyNURBS faces that still captures the geometry.
Entering a higher percentage for the Curvature will capture more features.
For better results, prepare your geometry with the Shrinkwrap tool on the PolyMesh ribbon.