[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： +`uNO<$~f  
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关键点说几个： 7[I +1  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） Z"$iB-]  
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 h s_x @6  
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 <!F".9c@A  

以下是几个重要的函数： |AS~sjWSJ  
1.判断点在区域中函数 F}=_"IkZ  
2.计算夹角函数 LW k
/h1  
3.转置函数 5p6/dlN-a  
4.得到区域中心点，及区域半径函数 3aU5rbi|B  
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） ,&y_^-|d  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 Jg)( F|>o  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single (H"{r  
   cax = x2 - x1 4>OS2b`.;  
   cay = y2 - y1 #RbdQH !  
   cbx = x2 - x3 &xA>(|a\&-  
   cby = y2 - y3 L9XfR$7,z  
   mo_jj = cax * cbx + cay * cby g rCQ#3K*?  
   mo_ca = Sqr(cax * cax + cay * cay) rIb~@cR
)  
   mo_cb = Sqr(cbx * cbx + cby * cby) @,7r<6E  
   cos_acb = mo_jj / (mo_ca * mo_cb) $2+s3)  
   'ff_cos = cos_acb &*Xrh7K2e  
   If cos_acb >= 1 Then hnH<m7  
   nn = 0 P j,H]  
   ElseIf cos_acb <= -1 Then JdLPIfI^  
   nn = 3.14159265258979 'IFA>}e7
W  
   Else H\H7a.@nkF  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) K^o{lyK;@~  
   End If RyU8{-q  
   'ff_angle = nn :J_UXtx  
   ff_angle = nn * 180 / 3.14159265258979 *rbgDaQ  
End Function

'判断点在区域内函数 _KKux3a  
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 ah f,- ?S  
Dim aob, boc, cod, doa, sum As Single o5 ~VT!'[  
  If ppx = p1x And ppy = p1y Then uF1 4;  
     point_in = True Ly3!0P.<  
     Exit Function ^*4#ZvpG2  
  End If .AOc$Nt  
  If ppx = p2x And ppy = p2y Then 6P}?+ Gc  
     point_in = True GF9[|). T  
     Exit Function a'/C)fplL  
  End If -s!J3DB  
   If ppx = p3x And ppy = p3y Then .P7q)lj36h  
     point_in = True f0Q! lMv  
     Exit Function 8t=O=l\  
  End If (gPB@hAv  
     qo7<g*kf~  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) }yn%_KQ0  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) ZMZWO$"K1  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 5._QI/d)'J  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) n0gjcDHQ  
    sum = aob + boc + cod + doa `GBJa
k  
    If 360.01 > sum And sum > 359.99 Then a%BC{XX  
       point_in = True w'A*EWO  
    Else <}A6 )=T  
       point_in = False E2d
S@!]V  
    End If d*e8P ep  
End Function

'得到点半径,得到交点坐标函数 U';)]vB$  
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() 0PFC
%x  
    '求得中心点坐标 \'u+iB g  
Dim tt As String 8YE4ln  
Dim rt(3) As Single /O$~)2^h  
    '判断是否平行 k~:(.)Nr  
   acx = p3x - p1x v(JjvN21  
   acy = p3y - p1y J Q*~le*  
   bdx = p4x - p2x MIl\Bn  
   bdy = p4y - p2y roAHkI  
   If acx * bdy = acy * bdx Then 9}2/ko  
      rt(0) = 0 GHLnwym  
      Exit Function 7b-[# g  
   Else R\n@q_!`X  
      '判断斜率存在否 <_pLmYI  
      If p1x = p3x And p2x <> p4x Then 9;vES^  
         tt = "ac_n_bd_y" :jkPV%!~  
      ElseIf p1x <> p3x And p2x = p4x Then |B$JX'_  
         tt = "ac_y_bd_n" +/%4E %  
      ElseIf p1x <> p3x And p2x <> p4x Then 7^Us  
         tt = "ac_y_bd_y" -{JReplc  
      End If 5N6R%2,A  
    Select Case tt 0QquxYYw,  
         Case "ac_n_bd_y" qFDy)4H)  
            'bd线段方程 XPq`;<G  
            k_bd = bdy / bdx \8a014  
            b_bd = p2y - k_bd * p2x ? N]bFW"t|  
            p_x = p1x -:L7iOzgD  
            p_y = k_bd * p_x + b_bd !IC .0I`  
         Case "ac_y_bd_n" wRwx((eb  
            'ac线段方程 j!Ys/D  
            k_ac = acy / acx Bs`='w%7  
            b_ac = p1y - k_ac * p1x jL5O{R[ x:  
            p_x = p2x I|Hcs.uW  
            p_y = k_ac * p_x + b_ac C'l\4ij)7  
        Case "ac_y_bd_y" 0L"uU3  
           'ac，bd线段都要求 gGA5xkA  
           k_ac = acy / acx GpO@1 C/  
           b_ac = p1y - k_ac * p1x "FGgem%9  
           k_bd = bdy / bdx l,A\]QDvl  
           b_bd = p2y - k_bd * p2x R*LPwJuv  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 2y8FP#  
           p_y = k_ac * p_x + b_ac p((.(fx  
        End Select HP3%CB  
      rt(1) = p_x "].TKF#yg  
      rt(2) = p_y !{uV-c-
5,  
     Y%]g,mG  
'计算最大半径 n],cs  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) @N>rOA  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) -ECnX/ "  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) C;70,!3  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) B1i'Mzm-4  
Dim bb(5) As Single GLV`IkU %  
  bb(1) = rr1 6
w{""K.{  
  bb(2) = rr2 a
hM?;p  
  bb(3) = rr3 [ CU8%%7  
  bb(4) = rr4
Ai)Q(]  
  nb = rr1 N;m62N  
For i = 1 To 4 =5%}CbUU)4  
    If nb <= bb(i) Then 5KYR"-jY  
       nb = bb(i) ]Qx-f* D6  
    End If #]}G{ P  
Next i n=!5ha%#N  
    rt(0) = Sqr(nb) W"xRf0\V
 
    rr = rt() ROfke.N\'  
  End If ?0s&Kz4B  
         a[lx&CHgI  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  E|^~R}z)  

+xtR`Y"  
有热压工艺方面的人才或者资料分享下； Wj.
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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 axi%5:I  

高手真多！

楼主威武霸气.