[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： qX%_uOw:%  
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关键点说几个： B\~}3!j  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） |Cv!,]9:r  
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 @d'j zs  
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 >MZ/|`[M  

以下是几个重要的函数： L(-4w+  
1.判断点在区域中函数 5P2K5,o|n~  
2.计算夹角函数 6ujWNf  
3.转置函数 vM={V$D&  
4.得到区域中心点，及区域半径函数 $xsd~L&  
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 7B!h|  
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}]-*T|a  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single  7GGUV  
   cax = x2 - x1 4+n\k  
   cay = y2 - y1 _c07}aQ ],  
   cbx = x2 - x3 TeQV?ZQ#}  
   cby = y2 - y3 \U0Q<ot/7  
   mo_jj = cax * cbx + cay * cby Jm@oDME_E  
   mo_ca = Sqr(cax * cax + cay * cay) , gHDx  
   mo_cb = Sqr(cbx * cbx + cby * cby) U$g?!Yl0  
   cos_acb = mo_jj / (mo_ca * mo_cb) /Oono6j  
   'ff_cos = cos_acb z:O8Ls^\T  
   If cos_acb >= 1 Then l;U?Z'n  
   nn = 0 ZCw]m#lS  
   ElseIf cos_acb <= -1 Then 3|7QUld  
   nn = 3.14159265258979 3`HV(5U[  
   Else }H4RR}g  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) {g6%(X\r.r  
   End If \
e_O4  
   'ff_angle = nn XW9!p.*.U  
   ff_angle = nn * 180 / 3.14159265258979 A&{Nh` q
 
End Function

'判断点在区域内函数 6@o*xK7L  
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 ^.tg7%dJ  
Dim aob, boc, cod, doa, sum As Single mOSv9w#,  
  If ppx = p1x And ppy = p1y Then 8MBAtVmy  
     point_in = True ^8tEach  
     Exit Function `/g UV  
  End If
^aQ
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  If ppx = p2x And ppy = p2y Then ijcm2FJcG  
     point_in = True c,22*.V/  
     Exit Function +p^u^a  
  End If ;4a{$Lw~^9  
   If ppx = p3x And ppy = p3y Then IID5c" oR  
     point_in = True l2d{ 73h  
     Exit Function AGno6
g  
  End If f::Dx1VcX  
     ,Q,^3*HX9}  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) *I'yH8F
cn  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) E4!Fupkpf  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) Al'3?  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) P2!C|SLK  
    sum = aob + boc + cod + doa ~ 1pr~  
    If 360.01 > sum And sum > 359.99 Then yVc(`,tZ(  
       point_in = True t5zKW _J7  
    Else +V+a4lU14  
       point_in = False bcR_E5x$  
    End If ':W[
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End Function

'得到点半径,得到交点坐标函数 ]?)TdJ`  
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() ca}2TT&t  
    '求得中心点坐标 />Nt[o[r  
Dim tt As String 6#yUc_5 \  
Dim rt(3) As Single .o8t+X'G  
    '判断是否平行 +3`alHUK  
   acx = p3x - p1x zVD:#d%b  
   acy = p3y - p1y nie%eC&U  
   bdx = p4x - p2x ExM,g'7  
   bdy = p4y - p2y fatf*}eln  
   If acx * bdy = acy * bdx Then `kr?j:g
 
      rt(0) = 0 h$=
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      Exit Function i&k7-<  
   Else nd(S3rct&  
      '判断斜率存在否 6,uX,X5  
      If p1x = p3x And p2x <> p4x Then qVPeB,kIz  
         tt = "ac_n_bd_y" {|\.i  
      ElseIf p1x <> p3x And p2x = p4x Then 4~=l}H>&  
         tt = "ac_y_bd_n" ~v83pu1!2s  
      ElseIf p1x <> p3x And p2x <> p4x Then Th[dW<  
         tt = "ac_y_bd_y" ;wVwX6:ZKr  
      End If lLD12d  
    Select Case tt _rYkis^u  
         Case "ac_n_bd_y" GF WA>5n'  
            'bd线段方程 smLQS+UE  
            k_bd = bdy / bdx T)CP2U  
            b_bd = p2y - k_bd * p2x &/b~k3{M_  
            p_x = p1x ZN6Z~SL_i~  
            p_y = k_bd * p_x + b_bd rGkyGz8>  
         Case "ac_y_bd_n" kN>!2UfNS  
            'ac线段方程 <t,x RBk  
            k_ac = acy / acx XUw/2"D'?  
            b_ac = p1y - k_ac * p1x FC*[*  
            p_x = p2x Z6p
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            p_y = k_ac * p_x + b_ac |)81
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        Case "ac_y_bd_y" j.kG};f  
           'ac，bd线段都要求 H|D.6^  
           k_ac = acy / acx xm@_IL&P  
           b_ac = p1y - k_ac * p1x
W%)Y#C  
           k_bd = bdy / bdx s@DLt+ O5  
           b_bd = p2y - k_bd * p2x @I*{f  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) $g7<Y*t[  
           p_y = k_ac * p_x + b_ac ASfaX:ke  
        End Select Rh |nP&6  
      rt(1) = p_x LDD|(KLR*.  
      rt(2) = p_y 7)k\{&+P  
     Y<rU#Z#T  
'计算最大半径 ]7mt[2Cd  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) QIgNsz  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ^H'\"9;7  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) h}EPnC}  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) Lk$B{2^n  
Dim bb(5) As Single MWL% Bz  
  bb(1) = rr1 "Pf~iwfw  
  bb(2) = rr2 O<\@~U  
  bb(3) = rr3 &M'*6A  
  bb(4) = rr4 >U3cTEs cj  
  nb = rr1 )Z VD+X  
For i = 1 To 4 S@Hf &
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    If nb <= bb(i) Then X|8c>_}  
       nb = bb(i) g4@ lM"|S  
    End If FE{FGMq  
Next i S+2(f> Z  
    rt(0) = Sqr(nb) 7!$^r$t  
    rr = rt() @]#1(9P  
  End If B+0hzkPY  
         3Hm/(C  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  qc~iQSI  

!o[7wKrXb  
有热压工艺方面的人才或者资料分享下； 3gj+%%!G\  
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 ,$+V  

高手真多！

楼主威武霸气.