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¦^´_ 6# stillfish00

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¦^´_ 10# ML089
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  1. Function PolyArea(rngPoly As Range)
  2.     Dim i As Long, j As Long
  3.     Dim pix As Double, piy As Double
  4.     Dim pjx As Double, pjy As Double
  5.     Dim arPoly, area As Double
  6.         
  7.     arPoly = rngPoly.Value
  8.     If UBound(arPoly, 2) <> 2 _
  9.         Or arPoly(1, 1) <> arPoly(UBound(arPoly), 1) _
  10.         Or arPoly(1, 2) <> arPoly(UBound(arPoly), 2) Then PolyArea = CVErr(xlErrRef): Exit Function
  11.    
  12.     area = 0
  13.     For i = 1 To UBound(arPoly) - 1
  14.         j = i + 1
  15.         pix = arPoly(i, 1): piy = arPoly(i, 2)
  16.         pjx = arPoly(j, 1): pjy = arPoly(j, 2)
  17.         
  18.         area = area + pix * pjy
  19.         area = area - piy * pjx
  20.     Next
  21.     PolyArea = Abs(area) / 2
  22. End Function
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¦^´_ 12# stillfish00


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¦^´_ 12# stillfish00
stillfish00¤j ¶W¼F®`¡A¯u¬O¤Ñ¤~­C~
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b]¦^´_ 12# stillfish00

stillfish00 ¤j±z¦n¡A§Ú­è­è¥Î¤F¤@¤U§Aªº¦Û­q¨ç¼Æ(²Ä¤@¦¸¥Î³o­Ó)
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ÁÙ¬O¦³¨ä¥L¤H·|¥Î¤F? ML089¤j?  ·P®¦~
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¦^´_ 15# ui123

µ{¦¡©ñ¦b Module1
A°Ï­±¿n =PolyArea(C4:D8)
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¦^´_ 16# ML089

ML089 ¤j~  O4 Àx¦s©M¤U­±ªº¤½¦¡«ç»ò¶ñ¡AµLªk§P¥XABC°Ï???¡A«ô°UÀ°§Ú¬Ý¤@¤U¡AÁÂÁ§A^^
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¦^´_ 12# stillfish00
¦¨¥\¤F¡A§P©w¥XABC°Ï¤F ~Ya^^   ÁÂÁÂstillfish00¤j ¤ÎML089¤j

°Ý¤@¤Ustillfish00¤j ¤ÎML089¤j
1)¥]§tÂI¦bABCÃä½t½u¤W«ç»ò¿ì?(±Ä¨ú¦pªG­è¦n¦b­«Å|ªº½u¤W¡A¨ú¸û¤p¨º¤@­Ó(A<B<C)¡A¨Ò¦p¡A­è¦n¦bA°Ï¤ÎB°Ï¥æ±µ½u¤W¡AºâA°Ïªº)
2)³o­Ó¥i¥H¥Î¦b¦hÃä§Î¶Ü? ¦³¨Ç"¤£³W«hªº¦hÃä§Î"©O?
3)ÁÙ¬O¤£À´ A°Ï­±¿n =PolyArea(C4:D8) ¬O­n°µ¤°»ò?
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¦^´_ 12# stillfish00

Ãö©ó­è­èªº°ÝÃD for stillfish00¤j ¤ÎML089¤j

1)¥]§tÂI¦bABCÃä½t½u¤W«ç»ò¿ì?(±Ä¨ú¦pªG­è¦n¦b­«Å|ªº½u¤W¡A¨ú¸û¤p¨º¤@­Ó(A<B<C)¡A¨Ò¦p¡A­è¦n¦bA°Ï¤ÎB°Ï¥æ±µ½u¤W¡AºâA°Ïªº)
    Ans:­«Å|½u¤W¡A·|§P¬Ò¨S¦AABC°Ï¤W

2)³o­Ó¥i¥H¥Î¦b¦hÃä§Î¶Ü? ¦³¨Ç"¤£³W«hªº¦hÃä§Î"©O?
    Ans:"À³¥Î©Ê«D±`¼s"¡A¥B¥i¥H¹ï¥ô¦ó¦hÃä§ÎµL­­¼W¥[°Ï°ì~¶W¯Å¼F®`

3)ÁÙ¬O¤£À´ A°Ï­±¿n =PolyArea(C4:D8) ¬O­n°µ¤°»ò?
    Ans:ÁÙ¬O¤£À´³o­n°µ¤°»ò @@ ¥i¥H¸Ñ»¡¤@¤U¥\¯à¶Ü? ·P®¦

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­è­è¨Ï¥Î¤ß±o¡A¶W¹ê¥Î ¦A¦¸ÁÂÁ  stillfish00¤j

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¦^´_ 19# ui123
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°Ï°ì¤£­­ABC¤T°Ï¥i¦b°Ñ¼Æ¦Û¦æ¼W¥[¡A¦ý­n¨Ì°Ñ¼Æ¶¶§Ç¡C
  1. Function pointInPoly(ptx As Double, pty As Double, arPoly) As Boolean
  2.     Dim i As Long, j As Long
  3.     Dim pix As Double, piy As Double
  4.     Dim pjx As Double, pjy As Double
  5.    
  6.     For i = 1 To UBound(arPoly) - 1
  7.         j = i + 1
  8.         pix = arPoly(i, 1): piy = arPoly(i, 2)
  9.         pjx = arPoly(j, 1): pjy = arPoly(j, 2)
  10.         
  11.         '¦hÃä§ÎÃä¤W
  12.         If (pix - ptx) * (pjy - pty) - (piy - pty) * (pjx - ptx) = 0 And _
  13.             (pix - ptx) * (pjx - ptx) + (piy - pty) * (pjy - pty) <= 0 Then _
  14.         pointInPoly = True: Exit Function
  15.         
  16.         '¦hÃä§Î¤º³¡
  17.         If Not (piy > pty) = (pjy > pty) Then
  18.             If ptx < (pjx - pix) * (pty - piy) / (pjy - piy) + pix Then pointInPoly = Not pointInPoly
  19.         End If
  20.     Next
  21. End Function

  22. Function RegionABC(x As Double, y As Double, ParamArray polyRegion())
  23.     '3rd°Ñ¼Æ¬°A°Ï¡A4th°Ñ¼Æ¬°B°Ï¡C¡C¡C¨Ì¦¹Ãþ±À¡A¶V¾a«eªºÀu¥ý¡C
  24.     Dim i As Long, arPoly
  25.         
  26.     For i = LBound(polyRegion) To UBound(polyRegion)
  27.         arPoly = polyRegion(i).Value
  28.         
  29.         If UBound(arPoly, 2) <> 2 _
  30.             Or arPoly(1, 1) <> arPoly(UBound(arPoly), 1) _
  31.             Or arPoly(1, 2) <> arPoly(UBound(arPoly), 2) Then RegionABC = CVErr(xlErrRef): Exit Function
  32.         
  33.         If pointInPoly(x, y, arPoly) Then
  34.             RegionABC = Chr(65 + i - LBound(polyRegion))    '¨Ì¶¶¦ìÅã¥ÜA¡AB¡AC¡AD
  35.             Exit Function
  36.         End If
  37.     Next i
  38.     RegionABC = "¤£¦b½d³ò¤º"
  39. End Function
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