Cleaned up geometry libraries

Changes

2 changed files (+6/-6)

• Geometry/points_lines_vectors.cpp
  • @@ -27,7 +27,7 @@ double angle(point a, point o, point b) {
    return acos(dot(oa, ob) / sqrt(norm_sq(oa) * norm_sq(ob))); } - // (q.x - p.x) * (r.y - p.y) - (r.x - p.x) * (q.y - p.y) + // bool ccw(pl p, pl q, pl r) { return (q.f - p.f) * (r.s - p.s) - (r.f - p.f) * (q.s - p.s) > 0; } bool ccw(point p, point q, point r) { return cross(vec(p, q), vec(p, r)) > 0; } struct line {
  • @@ -71,4 +71,4 @@ double point_to_seg(point p, seg s) {
    bool seg_isect(seg a, seg b) { return ccw(a.p1, a.p2, b.p1) * ccw(a.p1, a.p2, b.p2) <= 0 && ccw(b.p1, b.p2, a.p1) * ccw(b.p1, b.p2, a.p2) <= 0); - } + }
• Geometry/polygons.cpp
  • @@ -1,5 +1,5 @@
    struct point { - ll x, y; // long long to avoid overflow problems + ll x, y; point() { x = y = 0; } point(ll _x, ll _y) : x(_x), y(_y) {} bool operator < (point p) const { return (x == p.x && y < p.y) || x < p.x; }
  • @@ -27,7 +27,7 @@ double angle(point a, point o, point b) {
    bool ccw(point p, point q, point r) { return cross(vec(p, q), vec(p, r)) > 0; } - bool in_polygon(point pt, const vector<point>& P) { + bool in_polygon(point pt, const vector<point> & P) { double sum = 0; for (int i = 0; i < P.size() - 1; i++) { if (pt == P[i]) return true;
  • @@ -36,14 +36,14 @@ bool in_polygon(point pt, const vector<point>& P) {
    return fabs(sum) > acos(-1.0); } - ll area(const vector<point>& P) { + ll area(const vector<point> & P) { ll res = 0; for (int i = 0; i < (int)P.size() - 1; i++) res += (P[i].x * P[i + 1].y - P[i + 1].x * P[i].y); return res; // return res / 2.0; } - vector<point> convex_hull(vector<point>& P) { + vector<point> convex_hull(vector<point> & P) { int n = P.size(), k = 0; vector<point> H(2 * n); sort(P.begin(), P.end());