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The original implementation won't work when the point is already on the line. See:
https://forum.freecadweb.org/viewtopic.php?f=3&t=29115#p237397
The new implementation works on the projections of the vectors linking the two first points with the symmetry point on the vector linking the two first points.
This assures that there is no stability problem when the point is already on the symmetry axis.
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The solver uses some heuristics to determine the "redundant to remove" and notify it to the user.
Basically it would pick the solver redundant constraint that affects most groups of redundants (popularity contest).
In the simple cases, all the redundants are equally popular and the popularity contest is untied by using the tagid (let say for simplicity it is the number at sketcher level Constraint3, the tagid=3).
This means that in simple cases, the solver systematically decides that the redundant constraint to handle from those showing a linear dependency is the one appearing the last.
This commits changes the way to untie the popularity contest, by giving more priority to those sketcher constraints that need a lower number of solver constraints (in other words,
those constraints that remove a lower amount of DoF). In case of tie, the tagid is then used to break the tie.
At least:
fixes#3434fixes#1557
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- Modification to transparently switch from SparseQR to DenseQR and back to SparseQR when using the DoF finder command.
- Command Tools dof finder command name change
- Support for addition of driving information to GCS constraints
- Support for keeping track of value parameters of driven constraints
- Support for getting which QR algoritm is being used at GCS level
- Improve Debug information.
- Support for addition of constraints with driving information for the solver constraints.
- Removal of the driven constraints from the Jacobian for QR decomposition
- Removal of the value freewheeling parameter from the Jacobian for QR decomposition
- Full detection of dependent parameters where DoF are present for Dense QR.
