diff options
Diffstat (limited to 'content/geometry/formulas.cpp')
| -rw-r--r-- | content/geometry/formulas.cpp | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/content/geometry/formulas.cpp b/content/geometry/formulas.cpp index 5d4e10d..b339451 100644 --- a/content/geometry/formulas.cpp +++ b/content/geometry/formulas.cpp @@ -6,20 +6,17 @@ constexpr double PIU = acos(-1.0l); // PIL < PI < PIU constexpr double PIL = PIU-2e-19l; // Winkel zwischen Punkt und x-Achse in [-PI, PI]. -double angle(pt a) {return arg(a);} +double angle(pt a) { return arg(a); } // rotiert Punkt im Uhrzeigersinn um den Ursprung. -pt rotate(pt a, double theta) {return a * polar(1.0, theta);} +pt rotate(pt a, double theta) { return a * polar(1.0, theta); } // Skalarprodukt. -auto dot(pt a, pt b) {return real(conj(a) * b);} - -// abs()^2.(pre c++20) -auto norm(pt a) {return dot(a, a);} +auto dot(pt a, pt b) { return real(conj(a) * b); } // Kreuzprodukt, 0, falls kollinear. -auto cross(pt a, pt b) {return imag(conj(a) * b);} -auto cross(pt p, pt a, pt b) {return cross(a - p, b - p);} +auto cross(pt a, pt b) { return imag(conj(a) * b); } +auto cross(pt p, pt a, pt b) { return cross(a - p, b - p); } // 1 => c links von a->b // 0 => a, b und c kolliniear |