[分享]绝对随机网点分布（excel之vba） [复制链接]

想学习的请研究下，直接给程序就没意思了，由于公司想做一套导光板的模具，没有现成的软件可用，就自己做了较简单的程序，虽然简单，但基本功能已经满足了导光板网点设计的要求；具备功能：任意多边形区域；含有光轴，且可以根据光源调整；网点密度可沿光轴方向调整，效果图如下： {@Y|"qIN  
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关键点说几个： O]{3aMs!Y  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） m1@ste;$W  
2.需要定义光轴的方向；简便的方法就是指定光源坐标，及网点区域坐标，这样光轴就确定了 32!jF}qpD  
3.网点区域密度可调；把区域分成若干小块，每块的密度不同即可 ^'EeJN  

以下是几个重要的函数： R<$_ <z  
1.判断点在区域中函数 4;anoqiG\  
2.计算夹角函数 0TA{E-A   
3.转置函数 Kx.'^y  
4.得到区域中心点，及区域半径函数 hE>ux"_2/  
5.再有就是若干个点抽取其中一部分；或者采用随机分布（该方法会有重合点，所以没采用） j)4:*R.Z]  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 +X[+SF)!  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single [JAHPy=+w  
   cax = x2 - x1 Ewjzm,2  
   cay = y2 - y1 hLYy  
   cbx = x2 - x3 W[trsFP1?  
   cby = y2 - y3 k I{)"  
   mo_jj = cax * cbx + cay * cby )!+M\fT  
   mo_ca = Sqr(cax * cax + cay * cay) 6H+'ezM  
   mo_cb = Sqr(cbx * cbx + cby * cby) 9Q{-4yF9k  
   cos_acb = mo_jj / (mo_ca * mo_cb) npsDy&  
   'ff_cos = cos_acb on?<3eED  
   If cos_acb >= 1 Then 5,/rh,?  
   nn = 0 `Y HnL4  
   ElseIf cos_acb <= -1 Then Z05kn{<a8  
   nn = 3.14159265258979 L%G/%*7;c  
   Else ,(d\!T/]'  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) rG7E[kii  
   End If oNW.-gNT  
   'ff_angle = nn Y,1ZvUOB  
   ff_angle = nn * 180 / 3.14159265258979 T: zO9C/  
End Function

'判断点在区域内函数 a%\6L  
Function point_in(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single, ppx As Single, ppy As Single) As Boolean +ucj>g1(#  
Dim aob, boc, cod, doa, sum As Single ]=X6* E*/E  
  If ppx = p1x And ppy = p1y Then X[' VZz7  
     point_in = True zNAID-5K;  
     Exit Function =;9
%Q{  
  End If &BF97%E2  
  If ppx = p2x And ppy = p2y Then  |tK
_Bn  
     point_in = True M%(B6};J  
     Exit Function p~(+4uA  
  End If @bPR"j5D  
   If ppx = p3x And ppy = p3y Then ;/ wl.
'GA  
     point_in = True s &4k  
     Exit Function 6I)[6R  
  End If --S1p0  
     X#;n Gq)5  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 8 $5 y]%!  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) x9ll0Ht  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) fU/&e^, 's  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) P{T\zT  
    sum = aob + boc + cod + doa y]3`U UvXD  
    If 360.01 > sum And sum > 359.99 Then o%EzK;Df  
       point_in = True &%@e6..Ex  
    Else ++9?LH4S4  
       point_in = False W=E+/ZvPt  
    End If Q#kSp8  
End Function

'得到点半径,得到交点坐标函数 %fbV\@jDCX  
Function rr(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single) As Single() CdEQiu  
    '求得中心点坐标 G3.*fSY$.<  
Dim tt As String }na0  
Dim rt(3) As Single h.Y&_=Gc  
    '判断是否平行 Q,ezAE  
   acx = p3x - p1x K20,aWBq;3  
   acy = p3y - p1y %*}h{n  
   bdx = p4x - p2x ='W=  
   bdy = p4y - p2y RGu`Jk  
   If acx * bdy = acy * bdx Then HbI'n,+  
      rt(0) = 0 saRYd{%+  
      Exit Function N>TmaUk  
   Else hqXp>.W  
      '判断斜率存在否 x/fhlf}a}=  
      If p1x = p3x And p2x <> p4x Then jj,CBNo(  
         tt = "ac_n_bd_y" =l)D$l  
      ElseIf p1x <> p3x And p2x = p4x Then -(dtAo6  
         tt = "ac_y_bd_n" f:9bq}vH  
      ElseIf p1x <> p3x And p2x <> p4x Then Ir\P[A  
         tt = "ac_y_bd_y" ^ABtg#  
      End If AX%N:)_$|  
    Select Case tt 40e(p/Qka  
         Case "ac_n_bd_y"
qnu<"$   
            'bd线段方程 r*
q  
            k_bd = bdy / bdx Z bW!c1s{  
            b_bd = p2y - k_bd * p2x @Ojbu@A  
            p_x = p1x {gC?kp  
            p_y = k_bd * p_x + b_bd ybC0Ee@  
         Case "ac_y_bd_n" 0&~JC>S  
            'ac线段方程 ~xa yGk  
            k_ac = acy / acx 7z2Q!0Sz  
            b_ac = p1y - k_ac * p1x '^n,)oA/G  
            p_x = p2x &ir|2"HV  
            p_y = k_ac * p_x + b_ac LULRi#n  
        Case "ac_y_bd_y" h]Y,gya[yk  
           'ac，bd线段都要求 q90 ~)n?  
           k_ac = acy / acx Bq5-L}z  
           b_ac = p1y - k_ac * p1x WaPuJ5;e  
           k_bd = bdy / bdx FUP0X2P   
           b_bd = p2y - k_bd * p2x s/l>P~3=  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 
;b5^)S  
           p_y = k_ac * p_x + b_ac U!GfDt  
        End Select [;C|WTYSL  
      rt(1) = p_x c W1`[b  
      rt(2) = p_y tCR#TW+IY-  
     0{OafL8&l  
'计算最大半径 6Y%{ YQ}s|  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) cq`!17"k  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) !C&  ^%a  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) Z,~PW#8<&  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 4Uk\hgT0  
Dim bb(5) As Single kt#t-N;}x  
  bb(1) = rr1 HEk{!Y  
  bb(2) = rr2 R0#'t+7^  
  bb(3) = rr3 0;L.h|R T(  
  bb(4) = rr4 rQ-,mq  
  nb = rr1 :caXQ)
  
For i = 1 To 4 aKFY&zN?  
    If nb <= bb(i) Then tZ.hSDH  
       nb = bb(i) h+!@`c>)Y  
    End If >g;995tG  
Next i #Q1 |]  
    rt(0) = Sqr(nb) <^w4+5sT/  
    rr = rt() FfC\uuRe  
  End If Eb7GiRT#  
         M+VAol}1  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  PU4-}!K  

*=P*b|P"$  
有热压工艺方面的人才或者资料分享下； Fw8b^ew  
我公司主要做透镜类产品，现在有客户要审核我公司的导光膜工艺，头疼 }lP`3e  

高手真多！

楼主威武霸气.