@unknownuser said:
Fredo6 wrote:
Conversion to curve is probably possible.
But be aware that in most cases, this won't be an arc of circle, even if you chose a Circular profile, except in the special cases where the corner is purely made of orthogonal faces.
Looking already forward to it.
Agree, it will not be in all cases an arc. But it is enough, if the edge to be rounded is perpendicular to the face at the end of the edge.
@unknownuser said:
uwesketch wrote:
Is it correct, that when using "Make curves", that now the curve is converted automatically to an arc as well?Fredo6 wrote:
Correct. I may introduce an option to disable this behavior however.
Since an arc or n-gon (polygon) is as well a curve, it is not wrong to always convert to an arc or polygon, if it is an arc or polygon. I do not see any disadvantage for this.
@unknownuser said:
Any chance that this feature is added as an option to FredoCorner for the generation of the corner edges when rounding using circles?
I understand that you ask for creating curves, possibly arcs when applicable.
I assume that only the rounding edges on rounded borders are to be converted to curves.
Yes, only the corner edges, not as well the inner edges or borders.
To clarify I marked in below picture the edges.
New feature "Convert to Arc/Circle":
Great, thanks a lot Fredo.
Is it correct, that when using "Make curves", that now the curve is converted automatically to an arc as well?
Now I can finally convert the corner edges generated by FredoCorner (using circle rounding) back to arcs, if desired. This then allows adding radius measurements in Sketchup and Layout! 
Any chance that this feature is added as an option to FredoCorner for the generation of the corner edges when rounding using circles?
I am not looking for a work around. The intent of the post is to report a misbehaviour of the QFT function "Remove Triangulation".
To reproduce the issue I have attached a sketchup file.
The below animated gif shows how to reproduce it.
![How to reproduce holes created by the QFT function "Remove Triangualtion"](/uploads/imported_attachments/a7Pe_QFT_Remove_Triangulation_Issue.gif "How to reproduce holes created by the QFT function "Remove Triangualtion"")
Example sketchup model to reproduce QFT "Remove Triangulation" issue
@unknownuser said:
optimaforever wrote:
You just want to remove triangulations on planar quads? use Fixit101 script.
Also the "Merge Faces" from "TT cleanup3" does the trick. - which seems the same in FixIt101.
But it would be nice if the function in QFT would work as well.
Yes, exactly.
But in a way, that afterwards you can toggle off the subdivision again.
I think when converting to a simple mesh, you cannot un-subd anymore.
When using "Remove Triangulation" on the below selected quads, then the triangulating edges are removed not only from planar quads, but also from non-planar quads.
Selected Quads:
After executing the "Remove Triangulation" command - it looks like a Swiss cheese 
Is there are way to avoid this?
@unknownuser said:
thomthom wrote:
I know the old RoundCorner didn't. But I thought the new FredoCorner had an edit feature. Pretty sure I at least saw a function to revert bevel/chamfer.
Yes, there is an Undo/Edit function. Which is a great feature and a good starting point for a (global) Toggle On/Off like in SubD.
But such a toggle on/off is not there yet.
Another issue is, that when using SubD on a group/component where FredoCorner has been applied, the FredoCorner Undo/Edit does not work anymore. Seem like SubD overwrites some information used by FredoCorner.
Would be great, if both tools could work together. Kind of a "FreThom tool"
@unknownuser said:
thomthom wrote:
Afraid not. Bridging the subdivided geometry with the not subdivided isn't really doable without artefacts. The shrinking effect of the subdivided mesh is one reason for this.Originally I created planar quads as a single face instead of two triangles - in an attempt to optimise the face count. But when you came to perform crease adjustments etc it'd be causing lag when the planar native quad had to be broken into triangles.
I see. Then I have another idea (since the adaptive Subdivision feature from OpenSubDiv also cannot be applied in SU):
As an option selectable by the user in SubD, could you run at the end of the subdivision process the "remove triangulation" from Quadface tool and then the "Merge Faces" Tool from your CleanUp3 (or the "Remove coplanar edges" command from Fredos "EdgeControl" tool)?
Like this, the still planar faces after subdivision would not contain so many coplanar edges.
I did some further testing with Catmull Interpolation. I found that in principle it works, but in the area of sharper edges/corners the Catmull Interpolation (by definition) will "inflate" the area on both sides around the edge/corner quite a bit. This could be solved in a similar way as in SubD where one can define a crease value.
But instead of defining how an edge/corner shall be interpolated, there is another way to obtain smooth edges and corners without shrinking: FredoCorner.
Combining FredoCorner and SubD in a workflow, will not solve the shrinking issue completely.
But using FreeoCorner in areas where no shrinking shall apply and use SubD on top to smooth the remaining areas, is a good compromise giving a lot of flexibility in subdividing.
An open point is, that FredoCorner does not (yet) offer a toggle on/off feature like SubD.
@Thom: Not sure if there is a collaboration/exchange between you and Fredo, but this would be a perfect combination
My last question on this "shrinking" topic: Will or is there an option in SubD to exclude areas from being subdivided in a group/component? Like you can define a crease as infinitely sharp, an area enclosed by sharp edges could be excluded for instance.
@unknownuser said:
Fredo wrote:
I am not sure I full understand the case, but apparently you would like that the SubDiv tool create several subdivision lines instead of one.
Yes, exactly: more lines .
The point is that the SubD Plugin will subdivide all faces in a Group/Component. So if I use a FredoCorner Circle to create a smooth corner (with many Segments) and then use as well SubD to smooth the rest of the component, SubD will subdivide as well the already smooth FredoCorner faces. This generates far too many faces and SubD will fail.
Therefore the idea is that FredoCorner should create a rough SubDivision mesh, so that SubD will generate a nice approximated circle for the corner and also smoothes the rest of the component.
I also tried it with an Edge where the two faces are not orthogonal. SubD will generate an approximated arc when using the proposed n-gon as a basis.
The existing option "Subdivision" in FredoCorner is good, but too rough of a mesh, if you want SubD to produce a "circle like" smoothing of the Corner.
Example of object using FredoCorner and SubD (only the Bell):
Hi Fredo,
When using Catmull-Clark subdivision (i.e. Thomthoms SubD) to smooth a corner, then the subdivided corner in general is not an arc. It is more like a squircle. See pictures 2 - 4 below.
If subdivision shall generate something that is close to an arc with a given radius, then the control mesh to start with cannot be an arc with the same radius or a square. (See pictures 1 to 4).
You get very close to a circle after subdivision, if you start with a regular n-gon where the Inner radius is the same as the offset. (the first and last segment of the n-gon are coplanar to the side faces of the cube)
Therefore it would be helpful, if FredoCorner could provide an option under the category "SubDivision" to create profiles as regular N-Gons with the inner radius = offset.
In an earlier post I mentioned that a squircle with an exponent value of roughly 2.1 gives good results as well. But a regular n-gon as the profile is even better.
In addition when subdividing a rounded corner, you may not want the whole object to shrink (which Catmull-Clark subdivision does by definition). This can be easily achieved when setting the border edges to creased in SubD. This has been done in the below examples.
As you can see with an 8-gon you already get a subdivided surface being 1.2% off a circle. With a 16-gon you are only 0.6% off.
The currently provided "SubDivision" option is basically a regular 4-gon with "inner radius = offset" and hence the proposed n-gon profile can be seen as a generalization of the existing option.
Thanks, I was looking for this option in the "undo/repair" screen, but not in the fredo tools menu.
P.S. yes, it is far better than no undo/edit funtion !
Is there a way to remove all FredoCorner "undo/edit" Information from a geometry?
I have the impression that after using the Edit function several times, it suddenly does not generate a good geometry anymore. When I then redraw the geometry from scratch, FredoCorner works nice again.
So I assume that there is some internal data stored on the geometry that causes the corruption.
What I also see when this happens, is the layer "LIBFREDO_hidden_Layer" in the list of layers.
Normally this layer is not there.
Sometimes one can get back to the "unccorrupted" geometry with Sketchup undo, but sometimes not.
![Geometry with "Fredo-rounded" Corner](/uploads/imported_attachments/aziT_BellFredoCorner_before_UndoEdit.png "Geometry with "Fredo-rounded" Corner")
![Geometry with "Fredo-rounded" Corner after entering Undo/Edit mode.](/uploads/imported_attachments/yjM9_BellFredoCorner_after_UndoEdit.png "Geometry with "Fredo-rounded" Corner after entering Undo/Edit mode.")
For this and other reasons a "remove all FredoCorner data" would be helpful.
I only did the Bell for now. But I hope it shows the idea/Concept.
The task is to keep the dimensions of the objects the same but still making the surface smooth.
For the bell this means that the sharp edges have to be smoothed and the less curved areas should be become round. As the less curved areas are the top of the bell.
@unknownuser said:
[highlight=#ff80ff:2cmkgmbv]by fredo6 » Tue Feb 05, 2019 5:03 pm:[/highlight:2cmkgmbv]
I have a slight problem with this cursor, because I cannot set the hot point. I fixed the problem by using another 'hand' cursor and it will go in a next release of Sketchup.
By the way, if anyone has a nice 'Cursor hand' png, ideally 28x28, that would be great.
Looking Forward to this. unfortunately I do not have a nice png.
@unknownuser said:
[highlight=#ff80ff:2cmkgmbv]by fredo6 » Tue Feb 05, 2019 5:03 pm:[/highlight:2cmkgmbv]
Normally, the number of segments should be even, whatever the profile. Although I could allow odd numbers of segments, it's a little bit of a headhache when you come to reassign materials from the bordering faces.
I understand your point with the materials, but sometimes when using only 3 or 5 segments, it just looks better, if the middle part of the rounded edge/corner is flat and does not have the edge.
It is only with squircles where it currently does not work with an odd number of segments. the other profiles work fine with odd segments.
Regarding theGerman Translation, I will give it a try.
Regarding the toggle on/off:
Ok, understand. It is indeed tricky.
I somehow see four different workflows:
Based on above use cases, from a UI perspective, one could therefore separate the undo/edit functionality from the Toggle On/Off functionality. Especially, if this makes the implementation easier.
The first two use cases need the undo/edit, the last two the toggle on/off.
Therefore it would be fine, if the on/off toggle for FredoCorner would as well only work on groups/components like in SubD.
Instead of only an "On/Off", a triple state toggle would be nice: OFF -> low poly -> high poly. The low and high poly would be defined by the user.
For Example low = 4 segments, high = 16 Segments.
Hi Thom
I hope below screenshots clarify.
Why is the smoothing of a creased edge depending on the number of iterations when the value is a relative value?
For me it would be easier, if a relative value of 1 would as well create a smooth edge. Like this one can easily distinguish between infnite and a relative value of 1.
original mesh with edge set to smooth:
infinite crease value:
absolute crease values:
corresponding relative values:
Do you have an example mesh that you consider complex enough to play with? I wiill take that mesh and subdivide it manually to show / develop the idea.
An edge marked as "infinitely sharp" will be subdivided as a non-smooth edge.
When removing the "infinitely sharp" flag, the crease value changes to be 1. It would be nice, if the edge would be marked as smooth when subdividing with a value of 1. Otherwise I have to set the crease value to 0.99 to get a sharp smoothed edge.
Thanks a lot Fredo for this very useful Plugin.
RoundCorner was already great, but this tops it.
What I realized while using the Plugin:
when pointing the mouse directly on an arrow modifier button (for instance to the left and right of the "#Seg" value) and then I click, the button to the left of it is activated. The gap between the button and the click area is about 4 mm. This is as well with other buttons. I have a Win 10 laptop with a 15" screen of 1600x900 Pixels. Not sure, if this is only on my PC.
for circles and Bezier curvers, one can choose anodd number of segments. But for Squirclethis is not working right. The point/edge below the center point is missing (consistently in the profile sceen, the preview and generated geometry).
I would very much like to have a toggle on/off button like in SubD. (SubD is great to smooth organic surfaces as I draw them for furniture, etc.). For technical objects with a lot of planar surfaces and creases containing only some roundings, FredoCorner with a "toggle on/off" would be perfect.
Very cool would be, if SubD and FredoCorner could share the same "toggle on/off" button concept. The two tools complement each other.
Currently when I create a FredoCorner geometry and then use SubD, I cannot use the undo/edit function with FredoCorner anymore.
With a "toggle on/off" button this point here would get obsolete:
I tried to use the SubDivision function of FredoCorner to produce thereafter with SubD a rounded corner in the shape of a circle. Since SubD generates C2 surfaces the rounding will not be in the shape of a circle. To approximate a circle after subdividing, a squircle with a factor of roughly 2.3 can be generated. The subdivided corner then is pretty close to a circle. Maybe this setting could be added as a preconfigured option to the FredoCorner SubDivision function.
If you need someone to help with the German translation, please let me know. I would be glad to contribute.
Hi thomthom,
I have checked the Catmull-Rom Spline in 3D and it works very ice.
The object used as a starting point is a regular cube that was subdiveded with SubD on the first level. This contains planar circles with 8 segments as well as non-planar "circles".
The CatMull interpolation was done with all corner points as control points. Each loop on the object was interpolated. The interpolation added one point to each existing segment (like increasing the level by one with SubD). Then the interpolated loops were manually connected to form the subdivided mesh.
For comparision, below screenshots also show the result when using SubD with level 2 subdividing on the cube.
The red circle below shows how the coarse 8 corner circle from the subdivided cube is smoothed.
Also good to see is, that the SubD subdivided cube is not yet a sphere (compare with the red circle).
As all corner points of the Level 1 SubD cube were used as control Points for the CatMull-Rom spline, the interpolated object is getting smoother, but will not become a sphere, since the starting object is not spherical.
Could this interpolation be added to SubD as a "none shrinking" option?
I also have attached the sketchup model from which these images were created.
Kind Regards
Uwe