From 342d2fa9c8f2612684843f2c30ecd875126f0667 Mon Sep 17 00:00:00 2001 From: Maximilian Albert Date: Sat, 1 Sep 2007 13:29:40 +0000 Subject: Infrastructure to set direction of infinite VPs (now adjustable by some shortcuts; this may be removed later on) (bzr r3657) --- src/line-geometry.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'src/line-geometry.h') diff --git a/src/line-geometry.h b/src/line-geometry.h index fc8f157e9..e678c4031 100644 --- a/src/line-geometry.h +++ b/src/line-geometry.h @@ -55,6 +55,10 @@ protected: NR::Coord d0; }; +inline double determinant (NR::Point const &a, NR::Point const &b) +{ + return (a[NR::X] * b[NR::Y] - a[NR::Y] * b[NR::X]); +} std::pair coordinates (NR::Point const &v1, NR::Point const &v2, NR::Point const &w); bool lies_in_sector (NR::Point const &v1, NR::Point const &v2, NR::Point const &w); bool lies_in_quadrangle (NR::Point const &A, NR::Point const &B, NR::Point const &C, NR::Point const &D, NR::Point const &pt); -- cgit v1.2.3