\ucf54\ub529\ud14c\uc2a4\ud2b8\ub294 \ud604\uc5c5\uc5d0\uc11c\uc758 \ud504\ub85c\uadf8\ub798\ubc0d \ub2a5\ub825\uc744 \ud3c9\uac00\ud558\uae30 \uc704\ud574 \ub2e4\uc591\ud55c \ubb38\uc81c\ub97c \ud3ec\ud568\ud558\uace0 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ubc88 \uae00\uc5d0\uc11c\ub294 C++\ub85c ‘\uc120\ubd84\uc758 \ubc29\ud5a5 \uad6c\ud558\uae30’ \ubb38\uc81c\ub97c \ud574\uacb0\ud558\ub294 \uacfc\uc815\uc744 \uc790\uc138\ud788 \uc54c\uc544\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \uc774 \ubb38\uc81c\ub294 \uae30\ud558\ud559\uc801 \ubb38\uc81c\ub85c, \uc810\uacfc \ubca1\ud130\uc758 \uae30\ucd08\uc801\uc778 \uac1c\ub150\uc774 \ud544\uc694\ud569\ub2c8\ub2e4.<\/p>\n
\uc8fc\uc5b4\uc9c4 \uc810 \uccab \ubc88\uc9f8 \uc904\uc5d0\ub294 \uc810\uc758 \uac1c\uc218\uac00 \uc8fc\uc5b4\uc9c0\uace0, \ub2e4\uc74c \uc138 \uc904\uc5d0\ub294 \uac01\uac01 \uc810\uc758 \uc88c\ud45c\uac00 \uc8fc\uc5b4\uc9d1\ub2c8\ub2e4.<\/p>\n 0\uc740 \ub3d9\uc77c\uc120 \uc704\uc5d0 \uc788\uc74c\uc744 \ub098\ud0c0\ub0b4\uba70, 1\uc740 \ubc18\uc2dc\uacc4 \ubc29\ud5a5, -1\uc740 \uc2dc\uacc4 \ubc29\ud5a5\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4.<\/p>\n \uc138 \uc810 A, B, C\uac00 \uc8fc\uc5b4\uc84c\uc744 \ub54c \uadf8\ub4e4\uc758 \ubc29\ud5a5\uc131\uc740 \ubca1\ud130\uc758 \uc678\uc801\uc744 \ud1b5\ud574 \uad6c\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. A\uc5d0\uc11c B\ub85c \ud5a5\ud558\ub294 \ubca1\ud130\uc640 A\uc5d0\uc11c C\ub85c \ud5a5\ud558\ub294 \ubca1\ud130\uc758 \uc678\uc801\uc758 \ubd80\ud638\ub97c \uc774\uc6a9\ud558\uc5ec \ubc29\ud5a5\uc744 \uacb0\uc815\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n \uc678\uc801\uc744 \ud1b5\ud574 \uad6c\ud55c \uacb0\uacfc\ub294 \ub2e4\uc74c\uacfc \uac19\uc774 \uc815\uc758\ub429\ub2c8\ub2e4:<\/p>\n \uc5ec\uae30\uc11c:<\/p>\n \uc774\uc81c C++\ub85c \ubb38\uc81c\ub97c \ud574\uacb0\ud558\uae30 \uc704\ud55c \ucf54\ub4dc\ub97c \uc791\uc131\ud574 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n \ucf54\ub4dc\ub294 \ub2e4\uc74c\uacfc \uac19\uc740 \ub2e8\uacc4\ub97c \ud3ec\ud568\ud569\ub2c8\ub2e4:<\/p>\n \uc774 \ubb38\uc81c\ub294 \uae30\ud558\ud559\uc801 \uc774\ud574\ub97c \uc694\uad6c\ud569\ub2c8\ub2e4. \ubca1\ud130\uc758 \uc678\uc801\uc740 \uc77c\ubc18\uc801\uc73c\ub85c 3D \uacf5\uac04\uc5d0\uc11c \ub450 \ubca1\ud130\uc758 \ud3c9\uba74\uc744 \uad6c\ubcc4\ud558\ub294 \ub370 \uc0ac\uc6a9\ub418\uc9c0\ub9cc, 2D \uacf5\uac04\uc5d0\uc11c\ub294 \ubc29\ud5a5\uc744 \uad6c\ubcc4\ud558\ub294 \ub370 \uc720\uc6a9\ud55c \ub3c4\uad6c\u3068\u306a\u308a\u307e\u3059. \uae30\ud558\ud559\uc801 \uac1c\ub150\uacfc \ubca1\ud130 \uc218\ud559\uc744 \uc774\ud574\ud558\ubbc0\ub85c\uc368, \ub2e4\uc591\ud55c \ubb38\uc81c\ub97c \ud574\uacb0\ud560 \ub2a5\ub825\uc744 \uae30\ub97c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n \uae30\ud558\ud559\uc801\uc73c\ub85c \uc774 \ubb38\uc81c\ub294 \uc9c1\uc120\uc758 \uae30\uc6b8\uae30\ub97c \uc774\ud574\ud558\ub294 \uac83\uc774\uae30\ub3c4 \ud569\ub2c8\ub2e4. \uc120\ubd84 A\uc5d0\uc11c B\ub85c, \uadf8\ub9ac\uace0 A\uc5d0\uc11c C\ub85c \ud5a5\ud558\ub294 \uacbd\uc6b0, \ub450 \ubca1\ud130\uc758 \uc0c1\ub300\uc801\uc778 \uae30\uc6b8\uae30\ub97c \ud310\ub2e8\ud568\uc73c\ub85c\uc368 \ubc29\ud5a5\uc131\uc744 \ud30c\uc545 \ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ubc88 \uac15\uc88c\uc5d0\uc11c\ub294 \uac04\ub2e8\ud55c \uae30\ud558\ud559 \ubb38\uc81c\ub97c \ud1b5\ud574 \ucf54\ub529\ud14c\uc2a4\ud2b8\uc5d0\uc11c \uc790\uc8fc \ucd9c\uc81c\ub418\ub294 \uc720\ud615\uc744 \ub2e4\ub918\uc2b5\ub2c8\ub2e4. ‘\uc120\ubd84\uc758 \ubc29\ud5a5 \uad6c\ud558\uae30’ \ubb38\uc81c\ub294 \uae30\ucd08\uc801\uc778 \uae30\ud558\ud559\uc758 \uc774\ud574\uac00 \ud544\uc694\ud55c \ubb38\uc81c\ub85c, \ubca1\ud130\uc758 \uc678\uc801\uc744 \uc774\uc6a9\ud558\uc5ec \ud574\uacb0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub7ec\ud55c \ubb38\uc81c\ub97c \uc5f0\uc2b5\ud568\uc73c\ub85c\uc368 \uc54c\uace0\ub9ac\uc998\uc801 \uc0ac\uace0\ub97c \uae30\ub974\uace0, \uae30\ucd08\uc801\uc778 C++ \ud504\ub85c\uadf8\ub798\ubc0d \ub2a5\ub825\uc744 \ud5a5\uc0c1\uc2dc\ud0ac \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n <\/body><\/p>\n","protected":false},"excerpt":{"rendered":"A(x1, y1)<\/code>, B(x2, y2)<\/code>, C(x3, y3)<\/code>\uac00 \uc788\uc744 \ub54c, \uc120\ubd84 AB<\/code>\uc640 \uc120\ubd84 AC<\/code>\uc758 \ubc29\ud5a5\uc744 \uad6c\ud558\ub294 \ubb38\uc81c\uc785\ub2c8\ub2e4. \uc774\ub54c \uc120\ubd84\uc758 \ubc29\ud5a5\uc740 \uc2dc\uacc4 \ubc29\ud5a5, \ubc18\uc2dc\uacc4 \ubc29\ud5a5 \ub610\ub294 \ub3d9\uc77c\uc120 \uc704\ub85c \uad6c\ubd84\ub429\ub2c8\ub2e4.<\/p>\n\uc785\ub825 \ud615\uc2dd<\/h3>\n
3\n0 0\n1 1\n2 2\n<\/code><\/pre>\n\ucd9c\ub825 \ud615\uc2dd<\/h3>\n
0\n<\/code><\/pre>\n\uc54c\uace0\ub9ac\uc998 \uc811\uadfc\ubc95<\/h2>\n
\ubca1\ud130\uc758 \uc678\uc801 \uacc4\uc0b0<\/h3>\n
cross_product = (x2 - x1) * (y3 - y1) - (y2 - y1) * (x3 - x1)\n<\/code><\/pre>\n\n
\ucf54\ub4dc \uad6c\ud604<\/h2>\n
#include <iostream>\n\nusing namespace std;\n\nint main() {\n int x1, y1, x2, y2, x3, y3;\n \n \/\/ \uc810 A, B, C\uc758 \uc88c\ud45c \uc785\ub825\n cout << \"\uc810 A \uc88c\ud45c (x1 y1): \";\n cin >> x1 >> y1;\n cout << \"\uc810 B \uc88c\ud45c (x2 y2): \";\n cin >> x2 >> y2;\n cout << \"\uc810 C \uc88c\ud45c (x3 y3): \";\n cin >> x3 >> y3;\n\n \/\/ \uc678\uc801 \uacc4\uc0b0\n int cross_product = (x2 - x1) * (y3 - y1) - (y2 - y1) * (x3 - x1);\n \n \/\/ \ubc29\ud5a5 \ud310\ub2e8\n if (cross_product > 0) {\n cout << \"\ubc18\uc2dc\uacc4 \ubc29\ud5a5 (1)\" << endl;\n } else if (cross_product < 0) {\n cout << \"\uc2dc\uacc4 \ubc29\ud5a5 (-1)\" << endl;\n } else {\n cout << \"\ub3d9\uc77c\uc120 \uc704 (0)\" << endl;\n }\n\n return 0;\n}\n<\/code><\/pre>\n\ucf54\ub4dc \uc124\uba85<\/h2>\n
\n
cross_product<\/code>\ub97c \uad6c\ud569\ub2c8\ub2e4.<\/li>\n\ubcf4\ub2e4 \uc2ec\ud654\ub41c \uc774\ud574\ub97c \uc704\ud55c \ucd94\uac00 \uc124\uba85<\/h2>\n
\uae30\ud558\ud559\uc801 \uc9c1\uad00<\/h3>\n
cross_product<\/code>\uac00 \uc591\uc218\uc778\uc9c0 \uc74c\uc218\uc778\uc9c0\uc5d0 \ub530\ub77c \uc810 C\uac00 \uc120 AB\uc758 \uc67c\ucabd\uc5d0 \uc788\ub294\uc9c0 \uc624\ub978\ucabd\uc5d0 \uc788\ub294\uc9c0\ub97c \uc54c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\uacb0\ub860<\/h2>\n