{"id":39903,"date":"2023-12-11T14:49:11","date_gmt":"2023-12-11T06:49:11","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=39903"},"modified":"2023-12-11T14:49:11","modified_gmt":"2023-12-11T06:49:11","slug":"%e7%bb%99%e5%ae%9a%e4%b8%89%e8%a7%92%e5%bd%a2abc%e5%92%8c%e4%b8%80%e7%82%b9pxyz%ef%bc%8c%e5%88%a4%e6%96%ad%e7%82%b9p%e6%98%af%e5%90%a6%e5%9c%a8abc%e5%86%85%ef%bc%8c%e7%bb%99%e5%87%ba%e6%80%9d","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/11\/%e7%bb%99%e5%ae%9a%e4%b8%89%e8%a7%92%e5%bd%a2abc%e5%92%8c%e4%b8%80%e7%82%b9pxyz%ef%bc%8c%e5%88%a4%e6%96%ad%e7%82%b9p%e6%98%af%e5%90%a6%e5%9c%a8abc%e5%86%85%ef%bc%8c%e7%bb%99%e5%87%ba%e6%80%9d\/","title":{"rendered":"\u7ed9\u5b9a\u4e09\u89d2\u5f62ABC\u548c\u4e00\u70b9P(x,y,z)\uff0c\u5224\u65ad\u70b9P\u662f\u5426\u5728ABC\u5185\uff0c\u7ed9\u51fa\u601d\u8def\u5e76\u624b\u5199\u4ee3\u7801"},"content":{"rendered":"

“`” \u6839\u636e\u9762\u79ef\u6cd5\uff0c\u5982\u679cP\u5728\u4e09\u89d2\u5f62ABC\u5185\uff0c\u90a3\u4e48\u4e09\u89d2\u5f62ABP\u7684\u9762\u79ef+\u4e09\u89d2\u5f62BCP\u7684\u9762\u79ef+\u4e09\u89d2\u5f62ACP\u7684\u9762\u79ef\u5e94\u8be5\u7b49\u4e8e\u4e09\u89d2\u5f62ABC\u7684\u9762\u79ef\u3002\u7b97\u6cd5\u5982\u4e0b\uff1a<\/p>\n

<pre><code>#include <iostream>#include <math.h>using namespace std;#define ABS_FLOAT_0 0.0001struct point_float{float x;float y;};<\/code><\/pre><\/p>\n

 <\/p>\n

\/**<\/p>\n

<ul>
\n<li>@brief \u8ba1\u7b97\u4e09\u89d2\u5f62\u9762\u79ef<\/li>
\n<\/ul><\/p>\n

*\/<\/p>\n

<pre><code> float GetTriangleSquar(const point_float pt0, const point_float pt1, const point_float pt2) { point_float AB, BC; AB.x = pt1.x – pt0.x; AB.y = pt1.y – pt0.y; BC.x = pt2.x – pt1.x; BC.y = pt2.y – pt1.y; return fabs((AB.x * BC.y – AB.y * BC.x)) \/ 2.0f; } \/** \\* @brief \u5224\u65ad\u7ed9\u5b9a\u4e00\u70b9\u662f\u5426\u5728\u4e09\u89d2\u5f62\u5185\u6216\u8fb9\u4e0a *\/ bool IsInTriangle( constpoint_float A, constpoint_float B, constpoint_float C, constpoint_float D) { floatSABC, SADB, SBDC, SADC; SABC = GetTriangleSquar(A, B, C); SADB = GetTriangleSquar(A, D, B); SBDC = GetTriangleSquar(B, D, C); SADC = GetTriangleSquar(A, D, C); floatSumSuqar = SADB + SBDC + SADC; if((-ABS_FLOAT_0 < (SABC – SumSuqar)) && ((SABC – SumSuqar) < ABS_FLOAT_0)) { \t\t returntrue; } else { \t\treturnfalse; \t } }<\/code><\/pre><\/p>\n

<pre><code> "“`
\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"

“`” \u6839\u636e\u9762\u79ef\u6cd5\uff0c\u5982\u679cP\u5728\u4e09\u89d2\u5f62ABC\u5185\uff0c\u90a3\u4e48\u4e09\u89d2\u5f62ABP\u7684\u9762\u79ef+\u4e09\u89d2\u5f62BCP\u7684\u9762\u79ef […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-39903","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/39903","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=39903"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/39903\/revisions"}],"predecessor-version":[{"id":39904,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/39903\/revisions\/39904"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=39903"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=39903"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=39903"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}