ç¹ï¼°ãç·åABãããã£ãã¨ãã«ãï¼°ããABã¸ã®åç·ã®è¶³ã®é·ããæ±ããã«ã¯ï¼ è¦ç´ ã¯ï¼æ¬¡å 空éå ã«åå¨ãããã®ã¨ãã¾ãã 解æ³ï¼ 解説 åç·ã®è¶³ç¹ I ãæ±ãã¦ããã¯ãã« PI ã®é·ãã¨ãã¦ãè·é¢ï½ãæ±ãã¾ãã å³ããAIã®å¤§ããã¯ã |AI| = |AP|cosαã§ãããã»ã»ã»â å ç©ã®å ¬å¼ãã APã»AB = |AP||AB|cosα ã»ã»ã»â¡ å¼â â¡ããã |AI| = (APã»AB) / |AB| |AI| ããã¨ã¾ãã°ãç¹Iã®ä½ç½®ã¯ã A + ( |AI|/|AB| ) AB = A + ( (APã»AB) / |AB||AB| ) AB ã¨ãã¦æ±ã¾ãã¾ãã ãã¯ãã« IP ã¯ãIã®ä½ç½®ãæ±ã¾ã£ãã®ã§ãæ±ã¾ãã¾ãã double CalcDistance_Type1( const CNhPoint2d& pointP, const CNhPoint2d& pointA, const
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