[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： iX6jvnJ:/  
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关键点说几个： [`\Qte%UH  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） |R
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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 uI&M|u:nT  
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 s9Z2EjQV  

以下是几个重要的函数： o7zfD94I  
1.判断点在区域中函数 GK&Dd"v  
2.计算夹角函数 "QS7?=>*F  
3.转置函数 ^&HYnwk  
4.得到区域中心点，及区域半径函数 Q,`kfxA`O  
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） ]EQ/*ct  
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}d\%*B  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 9"S3AEI  
   cax = x2 - x1 ?*,q#ZkA9W  
   cay = y2 - y1 hM}2++V  
   cbx = x2 - x3 tPsU7bFk  
   cby = y2 - y3 ?L^ Gu ]y  
   mo_jj = cax * cbx + cay * cby n:P}K?lg  
   mo_ca = Sqr(cax * cax + cay * cay) GcuZPIN%D  
   mo_cb = Sqr(cbx * cbx + cby * cby) K4BMa]/U  
   cos_acb = mo_jj / (mo_ca * mo_cb) *?{)i~  
   'ff_cos = cos_acb V QI7lJV"  
   If cos_acb >= 1 Then y+a&swd2(U  
   nn = 0 RMXP)[  
   ElseIf cos_acb <= -1 Then UWI5/R  
   nn = 3.14159265258979 *RPI$0
 
   Else 1Q<a+ l  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) I,D=ixK  
   End If Y%3j>_\;  
   'ff_angle = nn eIJQ|p<v  
   ff_angle = nn * 180 / 3.14159265258979 i|*:gH  
End Function

'判断点在区域内函数 - 0zo>[c/p  
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 YV+e];s  
Dim aob, boc, cod, doa, sum As Single !)GPI?{^5  
  If ppx = p1x And ppy = p1y Then .*ZNZ|g_  
     point_in = True k,2%%m  
     Exit Function fy-(B;  
  End If qFay]V(O|  
  If ppx = p2x And ppy = p2y Then D`u{U]  
     point_in = True 9rhz#w  
     Exit Function nv|&|6?`oK  
  End If 74Lq!e3hMF  
   If ppx = p3x And ppy = p3y Then \eN}V  
     point_in = True .69{GM?  
     Exit Function {L#Pdj{  
  End If rKO[;]_*  
     =T[kGg8`  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) @hk~8y]rz  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) #U^@)g6  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 1g *4e  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y)
?]:3`;h3  
    sum = aob + boc + cod + doa 9T)-|fja_  
    If 360.01 > sum And sum > 359.99 Then nM@
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       point_in = True k5
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    Else )8yNqnD  
       point_in = False <J\z6+,4E  
    End If 4jvgyi9  
End Function

'得到点半径,得到交点坐标函数 h>9GfF3  
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() 0KE+RzrB  
    '求得中心点坐标 p1q"[)WVn^  
Dim tt As String k68\ _NUL  
Dim rt(3) As Single eVS6#R]'m  
    '判断是否平行 `$7.(.#s  
   acx = p3x - p1x O)n"a\LD  
   acy = p3y - p1y >:WnCkbp  
   bdx = p4x - p2x ^fa+3`>  
   bdy = p4y - p2y P;C3{>G9  
   If acx * bdy = acy * bdx Then $C#G8Ck,  
      rt(0) = 0 qS:hv&~  
      Exit Function ?#da4W  
   Else :XqqhG  
      '判断斜率存在否 YBehyx2eK  
      If p1x = p3x And p2x <> p4x Then 9!&fak_  
         tt = "ac_n_bd_y" @z[,w`  
      ElseIf p1x <> p3x And p2x = p4x Then -{n2^vvF  
         tt = "ac_y_bd_n" -PPH]?
],  
      ElseIf p1x <> p3x And p2x <> p4x Then AwN7/M~'  
         tt = "ac_y_bd_y" _~]~ssn,1  
      End If ,T&=*q  
    Select Case tt ^E{M[;sF3y  
         Case "ac_n_bd_y" B >2"O  
            'bd线段方程 2O;Lw@W  
            k_bd = bdy / bdx R9bsl.e  
            b_bd = p2y - k_bd * p2x _kGJqyYV  
            p_x = p1x >ka*-8?  
            p_y = k_bd * p_x + b_bd RrB)u?  
         Case "ac_y_bd_n" _sLSl;/t  
            'ac线段方程 A8tzIh8  
            k_ac = acy / acx '9d<vWg  
            b_ac = p1y - k_ac * p1x %8C,9q  
            p_x = p2x cC@.&  
            p_y = k_ac * p_x + b_ac l}w
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        Case "ac_y_bd_y" T .#cd1b  
           'ac，bd线段都要求 1V?)T  
           k_ac = acy / acx F3uR:)4<M  
           b_ac = p1y - k_ac * p1x 3%HF"$Gg  
           k_bd = bdy / bdx d6RO2^  
           b_bd = p2y - k_bd * p2x 5~8FZ-x  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) itotn!Wb`  
           p_y = k_ac * p_x + b_ac ;&iZ{  
        End Select ,^Ug[pGG-  
      rt(1) = p_x 8&K1;l }  
      rt(2) = p_y WxE^S ??|  
     &>%R)?SZh  
'计算最大半径 1V
Xyn\  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) *;N6S~_'Y  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) m%$GiNs}  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) :6h$1 +6  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) TK! D=M  
Dim bb(5) As Single HLL:nczj  
  bb(1) = rr1 5>S=f{ghFw  
  bb(2) = rr2 xbTvv>'U  
  bb(3) = rr3 sLHUQ(S!  
  bb(4) = rr4 Gl!fT1zh0  
  nb = rr1 Sh@en\m=#S  
For i = 1 To 4 1K&_t  
    If nb <= bb(i) Then Q|$?d4La8  
       nb = bb(i) :Qc[>:N  
    End If ]QqT.z%B  
Next i \gU=B|W  
    rt(0) = Sqr(nb) AiDV4lHr  
    rr = rt()  0m&  
  End If Le?yzf  
         5YG%\  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  3{"MN=  

y'#i'0eeL  
有热压工艺方面的人才或者资料分享下； wLW[Vur[  
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 Q(0eq_X|6  

高手真多！

楼主威武霸气.