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#include <cstdio> #include <cmath> #include <vector> #include <cstring> #include <algorithm> #define point Vector #define ll long long #define setIO(s 阅读全文
posted @ 2022-01-19 00:47
guangheli
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摘要:
计算几何基础 1. 判断点是否在线段上 叉积必为 0 保证在延长线上,点积不大于 0 保证不会在线段的两侧. int Onsegment(point tmp, point a, point b) { if(dcmp(cross(a - tmp, b - tmp)) == 0 && dcmp(dot( 阅读全文
posted @ 2022-01-19 00:45
guangheli
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