diff options
Diffstat (limited to 'src/live_effects/lpe-powerstroke.cpp')
| -rw-r--r-- | src/live_effects/lpe-powerstroke.cpp | 15 |
1 files changed, 0 insertions, 15 deletions
diff --git a/src/live_effects/lpe-powerstroke.cpp b/src/live_effects/lpe-powerstroke.cpp index 79997ff94..281376cde 100644 --- a/src/live_effects/lpe-powerstroke.cpp +++ b/src/live_effects/lpe-powerstroke.cpp @@ -34,21 +34,6 @@ namespace Geom { // should all be moved to 2geom at some point -/** -* note that -unitTangentAt(reverse(a),0.) == unitTangentAt(a,1.) but the former is more reliable (sometimes the sign is wrong for the latter) -*/ -Point unitTangentAt( D2<SBasis> const & a, Coord t, unsigned n = 3) { - std::vector<Point> derivs = a.valueAndDerivatives(t, n); - for (unsigned deriv_n = 1; deriv_n < derivs.size(); deriv_n++) { - Coord length = derivs[deriv_n].length(); - if ( ! are_near(length, 0) ) { - // length of derivative is non-zero, so return unit vector - return derivs[deriv_n] / length; - } - } - return Point (0,0); -} - /** Find the point where two straight lines cross. */ boost::optional<Point> intersection_point( Point const & origin_a, Point const & vector_a, |