1 #ifdef _2GEOM_D2 /*This is intentional: we don't actually want anyone to
2 include this, other than D2.h. If somone else tries, D2
3 won't be defined. If it is, this will already be included. */
4 #ifndef __2GEOM_SBASIS_CURVE_H
5 #define __2GEOM_SBASIS_CURVE_H
7 #include <2geom/sbasis.h>
8 #include <2geom/sbasis-2d.h>
9 #include <2geom/piecewise.h>
10 #include <2geom/matrix.h>
12 //TODO: implement intersect
14 namespace Geom {
16 inline D2<SBasis> compose(D2<SBasis> const & a, SBasis const & b) {
17 return D2<SBasis>(compose(a[X], b), compose(a[Y], b));
18 }
20 SBasis L2(D2<SBasis> const & a, unsigned k);
21 double L2(D2<double> const & a);
23 D2<SBasis> multiply(Linear const & a, D2<SBasis> const & b);
24 inline D2<SBasis> operator*(Linear const & a, D2<SBasis> const & b) { return multiply(a, b); }
25 D2<SBasis> multiply(SBasis const & a, D2<SBasis> const & b);
26 inline D2<SBasis> operator*(SBasis const & a, D2<SBasis> const & b) { return multiply(a, b); }
27 D2<SBasis> truncate(D2<SBasis> const & a, unsigned terms);
29 unsigned sbasis_size(D2<SBasis> const & a);
30 double tail_error(D2<SBasis> const & a, unsigned tail);
32 //Piecewise<D2<SBasis> > specific decls:
34 Piecewise<D2<SBasis> > sectionize(D2<Piecewise<SBasis> > const &a);
35 D2<Piecewise<SBasis> > make_cuts_independent(Piecewise<D2<SBasis> > const &a);
36 Piecewise<D2<SBasis> > rot90(Piecewise<D2<SBasis> > const &a);
37 Piecewise<SBasis> dot(Piecewise<D2<SBasis> > const &a, Piecewise<D2<SBasis> > const &b);
38 Piecewise<SBasis> cross(Piecewise<D2<SBasis> > const &a, Piecewise<D2<SBasis> > const &b);
40 Piecewise<D2<SBasis> > operator*(Piecewise<D2<SBasis> > const &a, Matrix const &m);
42 Piecewise<D2<SBasis> > force_continuity(Piecewise<D2<SBasis> > const &f, double tol=0, bool closed=false);
44 std::vector<Geom::Piecewise<Geom::D2<Geom::SBasis> > > split_at_discontinuities (Geom::Piecewise<Geom::D2<Geom::SBasis> > const & pwsbin, double tol = .0001);
46 class CoordIterator
47 : public std::iterator<std::input_iterator_tag, SBasis const>
48 {
49 public:
50 CoordIterator(std::vector<D2<SBasis> >::const_iterator const &iter, unsigned d) : impl_(iter), ix_(d) {}
52 inline bool operator==(CoordIterator const &other) { return other.impl_ == impl_; }
53 inline bool operator!=(CoordIterator const &other) { return other.impl_ != impl_; }
55 inline SBasis operator*() const {
56 return (*impl_)[ix_];
57 }
59 inline CoordIterator &operator++() {
60 ++impl_;
61 return *this;
62 }
63 inline CoordIterator operator++(int) {
64 CoordIterator old=*this;
65 ++(*this);
66 return old;
67 }
69 private:
70 std::vector<D2<SBasis> >::const_iterator impl_;
71 unsigned ix_;
72 };
74 inline CoordIterator iterateCoord(Piecewise<D2<SBasis> > const &a, unsigned d) {
75 return CoordIterator(a.segs.begin(), d);
76 }
78 //bounds specializations with order
79 inline Rect bounds_fast(D2<SBasis> const & s, unsigned order=0) {
80 return Rect(bounds_fast(s[X], order),
81 bounds_fast(s[Y], order));
82 }
83 inline Rect bounds_local(D2<SBasis> const & s, Interval i, unsigned order=0) {
84 return Rect(bounds_local(s[X], i, order),
85 bounds_local(s[Y], i, order));
86 }
88 }
90 #endif
91 #endif
94 /*
95 Local Variables:
96 mode:c++
97 c-file-style:"stroustrup"
98 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
99 indent-tabs-mode:nil
100 fill-column:99
101 End:
102 */
103 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :