[Solved] Arbitrary cone

[jruiz]

Good morning.
Suppose we have the face F of an arbitrary form belonging to some arbitrary object and a point P in space.
Is there any way of building a "cone" whose base being F and its vertex at P?
Regards

[chrisb]

Create the Point in Draft workbench and use Part->Loft. In PartDesign I recommend to create instead of the point an ever so tiny copy of the base sketch for lofting.

[meme2704]

Hi
The answer is yes, except that a point is not recognized, it is necessary to create a mini circle (r = 0.01mm)

[jruiz]

Create the Point in Draft workbench and use Part->Loft. In PartDesign I recommend to create instead of the point an ever so tiny copy of the base sketch for lofting.

Excelent!
Using that "non dimensionless point" of Draft Workbech did the job i was looking for.
Thanks a lot.

[jruiz]

Hi
The answer is yes, except that a point is not recognized, it is necessary to create a mini circle (r = 0.01mm)

Thanks a lot for your answer. These two ways of "cheating" loft tool (yours and that of chrisb ) work fine. The users have choices...

[jmaustpc]

Both Part Loft and Part Sweep, can use a vertex/point as a profile, but there are limitations/complications. See the wiki for a detailed explanation.

The point/vertex can be a Draft WB point but there is also a point in Part WB.

Part_Loft particularly under the subtitle "Limitations and complications"

and

Part_Sweep

[jmaustpc]

Hi
The answer is yes, except that a point is not recognized, it is necessary to create a mini circle (r = 0.01mm)

Thanks a lot for your answer. These two ways of "cheating" loft tool (yours and that of chrisb ) work fine. The users have choices...

meme2704 is wrong, you can use a point. the wiki explains all the complications etc.

[jruiz]

Hi
The answer is yes, except that a point is not recognized, it is necessary to create a mini circle (r = 0.01mm)

Thanks a lot for your answer. These two ways of "cheating" loft tool (yours and that of chrisb ) work fine. The users have choices...

meme2704 is wrong, you can use a point. the wiki explains all the complications etc.

When the "vertex" is zoomed in, the (draft) point continues being a point but this is not the case for the small circle.

[jmaustpc]

When the "vertex" is zoomed out, the (draft) point continues being a point but this is not the case for the small circle.

Yes, they are different geometry. However in the real world you would not have a genuine point in most cases, since that would mean that the tip is infinitely small, at a practical scale that might seem like it is true but if you looked under a micro scope it would likely be flat or rounded. FreeCAD's standard default precision for Shapes is extremely small, so depending on what you are making the model for, it is possible that you may be better to actually define the point as some other geometry or it may not matter.

[chrisb]

meme2704 is wrong, you can use a point. the wiki explains all the complications etc.

Perhaps meme2704 was thinking about the Sketcher point, which indeed cannot be used for such a loft, as it is only construction geometry.