[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： :^i^0dC  
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关键点说几个： s?2$ue&-f  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） g^7MM
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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 u0QzLi,  
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 &c>?~-!W  

以下是几个重要的函数： E&`Nh5JfC  
1.判断点在区域中函数 'Gl&Pa1g?  
2.计算夹角函数 ]QVNn?PA8  
3.转置函数 rx0~`cVV:  
4.得到区域中心点，及区域半径函数 ? *>]")[>  
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） l12{fpm  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 H@bf'guA|B  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single +{<#(}  
   cax = x2 - x1 `d7n?|pD  
   cay = y2 - y1 9KWuN:Sg  
   cbx = x2 - x3 #>lG7Ns|4  
   cby = y2 - y3 b~=0[Rv  
   mo_jj = cax * cbx + cay * cby d.UQW yLG  
   mo_ca = Sqr(cax * cax + cay * cay) kQ1w5mCh  
   mo_cb = Sqr(cbx * cbx + cby * cby) \K`L3*cBKK  
   cos_acb = mo_jj / (mo_ca * mo_cb) js iSg/  
   'ff_cos = cos_acb eET&pP3Rp  
   If cos_acb >= 1 Then wX >*H  
   nn = 0 I9h ?;(  
   ElseIf cos_acb <= -1 Then 'R-3fO???  
   nn = 3.14159265258979 @+3kb.P%7  
   Else KlRr8G!Z  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) *g?Po+ef%  
   End If wE+${B03  
   'ff_angle = nn X+UJzR90  
   ff_angle = nn * 180 / 3.14159265258979 (hiyNMC
  
End Function

'判断点在区域内函数 1U
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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 pe^u
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Dim aob, boc, cod, doa, sum As Single 94B\5I}  
  If ppx = p1x And ppy = p1y Then 0a80 LAK  
     point_in = True 89r DyRJ;  
     Exit Function /p8dZ
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  End If %CK^Si%+  
  If ppx = p2x And ppy = p2y Then !pD*p)`s  
     point_in = True feQ **wI  
     Exit Function g$b<1:8  
  End If ZYC<Wb)I  
   If ppx = p3x And ppy = p3y Then %Dwk  
     point_in = True Y "/]|'p  
     Exit Function o!)3?  
  End If [VE
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     +E{|63~q  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) yu;P +G  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) J+`VujWT  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 8ji_#og  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) )jt #=9ZQ  
    sum = aob + boc + cod + doa Hv2De0W  
    If 360.01 > sum And sum > 359.99 Then 
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       point_in = True x QIq^/F0  
    Else {WYX~Mvvj  
       point_in = False E{|W(z,  
    End If 2nR[Xh?L  
End Function

'得到点半径,得到交点坐标函数 G|!on<l&  
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()  |'B7v i)  
    '求得中心点坐标 i%0ur}p  
Dim tt As String ~XOTs  
Dim rt(3) As Single R}!:'^  
    '判断是否平行 AJF#Aw `o  
   acx = p3x - p1x /w}u3|L$  
   acy = p3y - p1y _sTROd)Vh  
   bdx = p4x - p2x $7^o#2 B  
   bdy = p4y - p2y gcl5jB5)>  
   If acx * bdy = acy * bdx Then ,,q10iF  
      rt(0) = 0 QC}CRkp  
      Exit Function (2$p{Uf  
   Else 7_inJ$  
      '判断斜率存在否 A;]}m8(*  
      If p1x = p3x And p2x <> p4x Then vVFy*#I#_[  
         tt = "ac_n_bd_y" Wa{`VS  
      ElseIf p1x <> p3x And p2x = p4x Then [J?aD`{#O  
         tt = "ac_y_bd_n" +[\FD; >  
      ElseIf p1x <> p3x And p2x <> p4x Then @emK1iwm  
         tt = "ac_y_bd_y" W*),y:  
      End If ~E2KZm  
    Select Case tt j}.\]$J  
         Case "ac_n_bd_y" 3 :<WY&9  
            'bd线段方程 qKr8)}h  
            k_bd = bdy / bdx CTq&-l:f  
            b_bd = p2y - k_bd * p2x h7lDHIQf  
            p_x = p1x l)1r+@)\  
            p_y = k_bd * p_x + b_bd e#$]Y?,  
         Case "ac_y_bd_n" {Tq_7,8  
            'ac线段方程 N_W}*2(  
            k_ac = acy / acx RC7]'4o  
            b_ac = p1y - k_ac * p1x ! |<Fo'U  
            p_x = p2x \o*5  
            p_y = k_ac * p_x + b_ac BBwy,\o#  
        Case "ac_y_bd_y" U`,6 * MS  
           'ac，bd线段都要求 A>o*t=5  
           k_ac = acy / acx o$jLzE"  
           b_ac = p1y - k_ac * p1x QI'Oz{vE  
           k_bd = bdy / bdx EyJJ0  
           b_bd = p2y - k_bd * p2x YIQ 4t  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) v$?+MNks  
           p_y = k_ac * p_x + b_ac mwHB(7YS,  
        End Select jaII r06  
      rt(1) = p_x PNgY>=Y  
      rt(2) = p_y K*LlW@  
     :LF?  
'计算最大半径 DgId_\Ze  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) %)zodf  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) `yrB->|vG  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) qr"3y  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) D#cyOrzy  
Dim bb(5) As Single 4'/nax$Bx;  
  bb(1) = rr1 i&bA2p3+d  
  bb(2) = rr2 SJb&m-  
  bb(3) = rr3 fI?>+I5  
  bb(4) = rr4 H<i]V9r  
  nb = rr1 &^ 1$^=  
For i = 1 To 4 N} G[7Rp8l  
    If nb <= bb(i) Then AG`L64B  
       nb = bb(i) x<tb  
    End If ype$ c  
Next i &Cr:6W@A  
    rt(0) = Sqr(nb) iVhJ t#_b  
    rr = rt() o=1Uh,S3R  
  End If *+Ek0M  
         9-&Ttbb4)0  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  )Kc<j!8-[  

q}i
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有热压工艺方面的人才或者资料分享下； 9P1OP Xv*p  
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 u 1>2
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高手真多！

楼主威武霸气.