fainpul
8 hours ago
> When using Fusion360 or SketchUp, you're used to drawing a "sketch" with a mouse or stylus and then extruding it to obtain a 3D volume. The approach to creating a volume with parametric modeling is completely different. Instead of "drawing in 3D", you code in 3D.
Minor correction: Fusion, FreeCAD and similar are parametric. It means you can alter the parameters of the created object after the fact and it rebuilds accordingly, as opposed to "destructive editing" like you have in something like Rhino 3D.
sylvainFR
8 hours ago
You're right!
In an other article I published I wrote: When we think of 3D modeling, we imagine a user interface where we can, with a single click, stretch a 2D rectangle and then extrude it; again with a click, we can select an edge and apply a fillet.
This is typically what we do with Fusion 360 or open-source software like FreeCAD. In fact, this is parametric modeling. The graphical interface, where you can rotate or zoom in on your 3D model, is just that — an interface, as its name suggests.
However, behind the scenes, the software is managing parametric modeling. To illustrate this, it is entirely possible in these programs to edit a shape and assign a new value to a given edge or cylinder. This is possible because it’s parametric modeling.
fainpul
7 hours ago
I mentioned this because you have a section called "What is parametric modeling?" where you explain this to the reader and it's not correct. You might want to fix that.