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by keithsloan52
Sat Jul 31, 2021 8:50 pm
Forum: Open discussion
Topic: Discussion - Possible way ahead for OpenSCAD hull and Minkowski requests?
Replies: 30
Views: 1465

Re: Discussion - Possible way ahead for OpenSCAD hull and Minkowski requests?

Ok, I drilled it down to this: Doesn't import (fails with one instance of the error message "Part::Fuse / Matrix_Union: Links go out of the allowed scope"): hull() { rotate([90, 0, 90]) { cube([60, 53, 1]); translate([0, 0, 1000]) { cube([50, 43, 1]); } } } Works (with alternative importe...
by keithsloan52
Fri Jul 30, 2021 7:26 pm
Forum: Open discussion
Topic: where do you see FreeCAD main focus go towards?
Replies: 31
Views: 1329

Re: where do you see FreeCAD main focus go towards?

There are some quirks on curves as it seems that the "matter" is splitted in many WB, but maybe simply making a WB that expose simply a toolbar with buttons that invoke operations from different workbenches will suffice to make "a unified view" of the matter. Don't think that wo...
by keithsloan52
Fri Jul 30, 2021 6:32 pm
Forum: Open discussion
Topic: Discussion - Possible way ahead for OpenSCAD hull and Minkowski requests?
Replies: 30
Views: 1465

Re: Discussion - Possible way ahead for OpenSCAD hull and Minkowski requests?

The convex hull should theoretically be uniquely defined for all imaginable shapes, but no clue how to calculate this efficiently in the general case without approximations. Well, consider something not so complicated like a hull of sphere and a cube. You have to determine various tangents and you ...
by keithsloan52
Fri Jul 30, 2021 2:53 pm
Forum: Open discussion
Topic: Discussion - Possible way ahead for OpenSCAD hull and Minkowski requests?
Replies: 30
Views: 1465

Re: Discussion - Possible way ahead for OpenSCAD hull and Minkowski requests?

The model is still triangulated, but at least it imports. (This renders my initial endeavour of getting a STEP file with round shapes a little moot, might have to find a solution without hull then - not easy, will have to investigate) Whilst it is possible to hull mesh objects, I don't think it is ...
by keithsloan52
Fri Jul 30, 2021 12:37 pm
Forum: Open discussion
Topic: Discussion - Possible way ahead for OpenSCAD hull and Minkowski requests?
Replies: 30
Views: 1465

Re: Discussion - Possible way ahead for OpenSCAD hull and Minkowski requests?

Just a guess but think it might have something to do with have the importer handles OpenSCAD group requests/statements. If I look at the CSG file ( That is what the importer deals with ) then there statements like hull() { multmatrix([[0, 0, 1, 0], [1, 0, 0, 0], [0, 1, 0, 0], [0, 0, 0, 1]]) { multma...
by keithsloan52
Fri Jul 30, 2021 6:42 am
Forum: Open discussion
Topic: Discussion - Possible way ahead for OpenSCAD hull and Minkowski requests?
Replies: 30
Views: 1465

Re: Discussion - Possible way ahead for OpenSCAD hull and Minkowski requests?

Your code Hullproblem.scad Hullproblem.csg is quite complex in that it takes OpenSCAD some time to render. On import, If one looks at the messages in FreeCAD's ReportView then one sees a lot of messages like 07:26:04 hull function 07:26:04 Part::Fuse / Matrix_Union008: Links go out of the allowed sc...
by keithsloan52
Thu Jul 29, 2021 8:16 pm
Forum: Open discussion
Topic: Discussion - Possible way ahead for OpenSCAD hull and Minkowski requests?
Replies: 30
Views: 1465

Re: Discussion - Possible way ahead for OpenSCAD hull and Minkowski requests?

I get the same problem with the standard OpenSCAD importer ( importCSG ) in FreeCAD 0.19.1. Chris @chennes has made some fixes which are in FreeCAD 0.20 but you say you tested 0.20 Are you sure you have the Latest 0.20? Might help to post your FreeCAD information. Anyway I used the Alternate Importe...
by keithsloan52
Wed Jul 28, 2021 8:42 pm
Forum: Help on using FreeCAD
Topic: Curves workbench
Replies: 1018
Views: 130739

Re: Curves workbench

maybe all poles could be move into the new freeahand when creating. To me that seems a bit Kludge. The curve comes from a file called BezierCurve.3dm which is a sample file supplied with Rhino. It clearly is a Bezier Spline although the rhino3dm importer calls it a PolyCurve (but the rhino3dm impor...
by keithsloan52
Wed Jul 28, 2021 7:55 pm
Forum: Help on using FreeCAD
Topic: Curves workbench
Replies: 1018
Views: 130739

Re: Curves workbench

Is it possible to select the control points and adjust the curve, if not could such a facility be added - Thanks Maybe by converting the curve into a freehand_bspline.??? I don't know if Chris could be. I got the impression from an early post that maybe this was possible in the early days, but if I...
by keithsloan52
Wed Jul 28, 2021 1:00 am
Forum: Help on using FreeCAD
Topic: Curves workbench
Replies: 1018
Views: 130739

Re: Curves workbench

In a similar line to previous post here is a BezierCurve imported from a 3dm file.
C622EFF5-2FAC-45D6-90CE-8A79AF0E55CC_4_5005_c.jpeg
C622EFF5-2FAC-45D6-90CE-8A79AF0E55CC_4_5005_c.jpeg (17.76 KiB) Viewed 346 times
BezierCurve.FCStd
(7.89 KiB) Downloaded 8 times
Is it possible to select the control points and adjust the curve, if not could such a facility be added - Thanks

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