Dimension-driven
Every sketch entity and feature has numeric fields. Type a new value and the part rebuilds.
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Parametric CAD Online
In VIZON, a part is a list of features driven by numbers. Change a dimension anywhere in the list and everything after it rebuilds to match.
What you can do
Smart rebuilds
Editing feature N rebuilds from feature N onward, so changes stay fast on long histories.
Rollback bar
Drag the bar up the feature list to insert new features earlier in the history.
Suppress
Switch a feature off without deleting it, to compare variants or isolate a problem.
Robust references
Fillets and chamfers remember edges by position, so they survive most upstream edits.
Clear errors
A feature that cannot build is marked with the reason, and the rest of the part still builds.
Real example: a pipe flange in eight features
The flange in the screenshot is built from this feature list. Changing the bolt-circle sketch or the pattern count updates every bolt hole at once.
| Feature | What it makes |
|---|---|
| Sketch 1 and Extrude 1 | The flange disc |
| Sketch 2 and Extrude 2 | The raised hub |
| Sketch 3 and Hole 1 | One bolt hole |
| Circular pattern 1 | Repeats the bolt hole around the axis |
| Chamfer 1 | Breaks the hub edge |
How parametric modeling works in VIZON
Want more detail? Read the guide: Parametric CAD Explained.
- Sketch a profile and give it real dimensions.
- Turn it into a solid with extrude or revolve.
- Add features that reference faces and edges: holes, fillets, chamfers, shells.
- Repeat geometry with linear or circular patterns, or mirror it.
- Go back and change any number. The model updates and the history stays intact.
Parametric CAD versus direct mesh editing
A mesh is a surface of triangles: you push and pull it directly, and it has no memory of how it was made. A parametric part stores its design intent, so a 40 mm hole stays a 40 mm hole when the plate around it gets thicker. Use parametric CAD for anything that has to fit, print or be manufactured.
Made in VIZON
Real models built with these tools. Each one is free to download.
Frequently asked questions
What does parametric mean in CAD?
The model is defined by parameters such as lengths, diameters and counts. Changing a parameter regenerates the geometry instead of you editing the shape by hand.
Can I undo or go back to an older version?
Yes. Ctrl+Z undoes edits in a session, and every save adds an entry to Version history that you can restore.
Can AI edit a parametric part?
Yes. Ask for a change in the AI bar, for example "make the plate 10 mm thicker", and it edits the feature list rather than replacing the model.
Related VIZON tools
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