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What means the column "dof" in the text Window? (by Walter Cadek)
I could not find a description for the column named "dof"?
What means ok respective the numbers?

How can I find reasons why not all my groups ar "ok" ?
Sat Oct 8 2022, 14:05:52
(no subject) (by Andrew)
dof is degrees of freedom, and is basically the number of points that can move relative to each other times the direction in which they can move. In a 2d sketch points have 2 degrees of freed, while in 3d they have free. It is related to the over constrained condition. The analyze menu has an entry to show unconstrained points. It is probably worth you while to spend hall an hour with simple sketches, lines, triangle and quadrangles,, and playing with various constraints to see how they effect the degrees of freedom. make the lines construction lines and you won't get the "not closed ..." error.

A fully constrained sketch is anchored to the origin in some fashion, which can be distance from the x and y axes

In summary a point moving a long a line, or arc, is one degree of freedom, if it can move off that line as well it has two degrees of freedom, In 3d it is one degree of freedom if constrained to a line, two if constrained to a plane, and 33 if it can move anywhere in 3 space.
Sat Oct 8 2022, 16:11:20
(no subject) (by Eric Buijs)
In addition to the excellent explanation of Andrew, a couple of years ago I created a tutorial video explaining the degrees of freedom, constraints and user interface of Solvespace. The tutorial is made with v2.3 of Solvespace but the DOF part still applies.
Sun Oct 9 2022, 06:19:30
(no subject) (by Walter Cadek)
Is there any support to find out what causes my dof's?

I think I fully constraint my scetch and dont know how to remove the last 2.

One point I learned is, if I snap f.e. the center of a circle to an existing point, it's not constraint to it. This is something I did not expect to be so, but it would be very helpful.

Thanks for the link to the videos, they are really helpful.
Fri Oct 14 2022, 17:09:52
(no subject) (by Andrew)
One point in a sketch should be constrained to a definite position in the drawing plane, by being coincident to an existing point, or other constraints to set its position. select the group showing degrees of freedom, and anchor the sketch in the plane.
Fri Oct 14 2022, 19:56:18
(no subject) (by Tom)
"Show Underconstrained Points" in the "Analyze" menu might help.
Fri Oct 14 2022, 23:05:01
(no subject) (by Walter Cadek)
One point I figured out is following:

Example: Setting the center of a circle to an Intersection point of 2 lines:

It cannot be set to coincident by moving with mouse, it does not snap.

1. Setting the distance between the 2 points to 0 (zero), results in 2 dof's.
Analyze unconstraint shows no problem!

2. Setting the distance to each of the lines to zero solves the problem.

So my question is, what is the difference between this 2 methods?
The answer might lay in the internal solve-procedures?

It took me a long time to find this out.
Thanks Tom, I did not mention the Analyze Menu till now. It helps, but when you try my example you will find, that there is no help in methode 1, it shows no problem.

By the way, in my version (Raspberry 4B Bullseye, Debian package version 3.0.rc2+repack1-3) which works almost perfect,
disapears the menu and show up partly, when you point the cursor on it. May be a graphical incompatibility, or is it even on other platforms the same and a wanted option?
Sun Oct 16 2022, 14:12:15
(no subject) (by Andrew)
For a point and another point, a line or a plane, use on point / curve / plane, shortcut 'o'. Also, when about to create a point, whether its is the first or subsequent point of a an entity, entities such as point lines and arcs will turn yellow if clicking the mouse will snap the new point to them.
Sun Oct 16 2022, 14:46:58
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