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Diffstat (limited to 'include/mbgl/util/unitbezier.hpp')
-rw-r--r-- | include/mbgl/util/unitbezier.hpp | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/mbgl/util/unitbezier.hpp b/include/mbgl/util/unitbezier.hpp index 92f23d6718..56d2ab6ead 100644 --- a/include/mbgl/util/unitbezier.hpp +++ b/include/mbgl/util/unitbezier.hpp @@ -42,6 +42,17 @@ struct UnitBezier { , ay(1.0 - (3.0 * p1y) - (3.0 * (p2y - p1y) - (3.0 * p1y))) { } + std::pair<double, double> getP1() const { + return { cx / 3.0, cy / 3.0 }; + } + + std::pair<double, double> getP2() const { + return { + (bx + (3.0 * cx / 3.0) + cx) / 3.0, + (by + (3.0 * cy / 3.0) + cy) / 3.0, + }; + } + double sampleCurveX(double t) const { // `ax t^3 + bx t^2 + cx t' expanded using Horner's rule. return ((ax * t + bx) * t + cx) * t; |