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It stores a rational BSpline even if non-rational.
It should be extended to store in addition whether it is periodic or not, i.e. to support periodic BSplines.
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1) Basic set/get interface for poles, weights, knots and multiplicities
2) Introduction of GeomBoundedCurve class replicating OCC hierarchy. Why? To provide seamless start/end point interface for any bounded curve, i.e. Bezier, BSpline,
Note: The ArcOfConic start/end point interface relies on GeomTrimmedCurve, and introduces CCW/CW correcting code which relies on Axis. Axis are introduced in GeomConic and are
not part of GeomBounded.
Note 2: In the future, it may be thought to make GeomArcOfConic (the equivalent of GeomTrimmedCurve) deriving from GeomBoundedCurve, as to fully replicate OCC hierarchy. GeomBoundedCurve
defines the functions as virtual to allow seamless integration.
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Correction of the emulation so that arcs of hyperbola are always CCW. This fixes mismatching of end points and edge in Sketcher.
- Fixing Hyperbola classes to get CCW emulation (like Ellipse classes).
In Sketcher:
- The Sketcher representation deals with the right branch of the Hyperbola only.
- Solver model is: Center, Focus1 (focus of the right branch), minor radius (b).
- HyperbolicArcRangeToEndPoints code is the one of Ellipse <= Awaiting DeepSOIC help ;)
- ConstraintPointOnHyperbola solver constraint is now implemented and should be working.
- No InternalAligment constraints implemented yet.
Fixes a bug where an arc, ellipse, or arc-of-ellipse, being reversed in
XY plane, behaved badly in sketcher (see forum thread "Sketch: how to
handle reversed external arcs?"
http://forum.freecadweb.org/viewtopic.php?f=10&t=9130 ).
Also fixes a problem with rotated arcs (see forum thread "Rotating Arc
in Sketcher"
http://forum.freecadweb.org/viewtopic.php?f=22&t=9145#p74262 ).
This is done by adding an emulation flag to a few methods in
Part::GeomXXX, which makes the shape to pretend being non-reversed
(CCW). This causes endpoints of reversed arcs of circles lineked as
external geometry to swap, causing broken sketches sometimes.
Part: Extension of Geometry::Curve to wrap more functions of OCC
Apart from:
bool tangent(double u, gp_Dir&) const;
that was already implemented, now it also implements:
Base::Vector3d pointAtParameter(double u) const;
Base::Vector3d firstDerivativeAtParameter(double u) const;
Base::Vector3d secondDerivativeAtParameter(double u) const;
bool normal(double u, gp_Dir& dir) const;
bool closestParameter(Base::Vector3d point, double &u);
i.e. apart from giving the tangent vector for a given curve at parameter value u,
it also gives:
- The point cartesian coordinates of the curve point at parameter value u
- The vector of the first derivative at parameter value u
- The vector of the second derivative at parameter value u
- The normal vector to the curve at parameter value u
- The parameter value of a curve closest ot a given point
Code cleanup: Changing Trim functionality of Ellipse to use OCC calculations
Part Curve functions extension: closestParameterToBasicCurve
It provides the parameter of the curve closest to a given point. If the curve is a Trimmed curve, the parameter of the basic underlaying curve closest to the point is provided.
- Ellipse introduction button via (center,majaxis extreme, a point in edge), ellipse is always CCW so that Z axis goes in the positive direction of the sketch
- Backwards compatibility with files of previous versions of ellipse not defining a phi angle
- Art by Jim (all the icons you see and the XPMs shown on creation of an ellipse)
- Element Widget support for ellipses
- Box selection for ellipses
- Point on Ellipse constraint based on the gardener's method based on Ulrich's function proposal (radcan simplified, i.e. with simplify_radical sage function)
- Tangent: Ellipse to Line based on DeepSOIC's geometric formulation (radcan simplified)
Sketcher New Feature: Internal Alignment Constraint
- The element to which internal alignment is applied has to be selected last.
- All other elements are added in the order of priority, taking into account existing elements
- Art by Jim (beautiful icons).
Sketcher New Feature: Tool to show/hide/restore the internal geometry of an element
- New functionality for show/hide internal geometry:
toggles between hiding all unused internal geometry elements and showing all internal geometry.
The restore function is implicit to the showing all internal geometry
Sketcher New Feature: Arc of Ellipse support
- Part::Geometry + Python implementation
- ArcOfEllipse creation method
- Art by Jim (all the icons you see and the XPMs shown on creation of arc of ellipse elements)
- Sketcher Element widget for ArcOfEllipse.
Bug fix: Select elements associated to constraints works now for foci internal alignment constraints
