[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： }b.%Im<3R  
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关键点说几个： sLxc(d'A  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） gc$l^`+M  
2.需要定义光轴的方向；简便的方法就是指定光源坐标，及网点区域坐标，这样光轴就确定了 U&p${IcEm  
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 2g! +<YZ~  

以下是几个重要的函数： p0vVkdd  
1.判断点在区域中函数 H9e<v4c  
2.计算夹角函数 )\$|X}uny&  
3.转置函数 #AQV(;r7@  
4.得到区域中心点，及区域半径函数 Ds:'Lb  
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） oNF6<A(@$  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 }@d@
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Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single U&qZ"  
   cax = x2 - x1 Otn1wBI  
   cay = y2 - y1 d%n-[ZL  
   cbx = x2 - x3 ysY*k`5  
   cby = y2 - y3 $ $
mV d+  
   mo_jj = cax * cbx + cay * cby X#
^[<5  
   mo_ca = Sqr(cax * cax + cay * cay) 4BpZJ~(p  
   mo_cb = Sqr(cbx * cbx + cby * cby) AFwdJte9e  
   cos_acb = mo_jj / (mo_ca * mo_cb) +mT_QsLEv  
   'ff_cos = cos_acb AH~E)S  
   If cos_acb >= 1 Then O?#7N[7  
   nn = 0 ]Zh%DQ  
   ElseIf cos_acb <= -1 Then SXP]%{@R/  
   nn = 3.14159265258979 :gFx{*xN/9  
   Else X 0+vXz{~g  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) S{T >}'y  
   End If \YrUe1  
   'ff_angle = nn $6R-5oQ  
   ff_angle = nn * 180 / 3.14159265258979 8zW2zkv2|#  
End Function

'判断点在区域内函数 G7/ +ogV  
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 W: z;|FF  
Dim aob, boc, cod, doa, sum As Single 2=!RQv~%  
  If ppx = p1x And ppy = p1y Then Xne1gms  
     point_in = True =~LJ3sIX  
     Exit Function  6(R<{{  
  End If nQ3A~ ()  
  If ppx = p2x And ppy = p2y Then ,zY{  
     point_in = True 9_h[bBx-'Q  
     Exit Function C\hM =%  
  End If sU^1wB Rj  
   If ppx = p3x And ppy = p3y Then a(ZcmYzXU  
     point_in = True @BMx!r5kn  
     Exit Function 2y1Sne=<Kb  
  End If pT6$DB#  
     ,|/f`Pl  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) YtLt*Ig%  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) S$-7SEkO+  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y)
<9b&<K:  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) */S_Icf  
    sum = aob + boc + cod + doa [{/jI\?v  
    If 360.01 > sum And sum > 359.99 Then )0k53-h&  
       point_in = True )D%~`,#pQ  
    Else |u p  
       point_in = False bpa?C  
    End If .*Qx\,  
End Function

'得到点半径,得到交点坐标函数 ?Z}
&EH  
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() \z)%$#I  
    '求得中心点坐标 K:WDl;8(d  
Dim tt As String `@yp+8  
Dim rt(3) As Single N6TH}~62}  
    '判断是否平行 JlJ a #  
   acx = p3x - p1x PZzMHK?hP  
   acy = p3y - p1y f%8C!W]Dm  
   bdx = p4x - p2x yWf`rF{  
   bdy = p4y - p2y y>ktcuML  
   If acx * bdy = acy * bdx Then Wa~=bH  
      rt(0) = 0 IAyp2  
      Exit Function ]I6 J7A[  
   Else .jK4?}]  
      '判断斜率存在否 ?&uu[y  
      If p1x = p3x And p2x <> p4x Then 8x
MX  
         tt = "ac_n_bd_y" 5`_SN74o  
      ElseIf p1x <> p3x And p2x = p4x Then 2 ? 4!K.  
         tt = "ac_y_bd_n" #p{4^  
      ElseIf p1x <> p3x And p2x <> p4x Then 5Yndc)Z  
         tt = "ac_y_bd_y" u]G\H!WkQ  
      End If c1gQ cqF  
    Select Case tt "EJ~QCW*Yh  
         Case "ac_n_bd_y" ^kSqsT"  
            'bd线段方程 Kf
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            k_bd = bdy / bdx $Z>'Jp  
            b_bd = p2y - k_bd * p2x 3r1*m  +  
            p_x = p1x VS|2|n1<6  
            p_y = k_bd * p_x + b_bd ,]/X\t5]D  
         Case "ac_y_bd_n" /Gfw8g\}  
            'ac线段方程 :MDKC /mC  
            k_ac = acy / acx 'O-"\J\  
            b_ac = p1y - k_ac * p1x M'l ;:  
            p_x = p2x nT)vNWT=  
            p_y = k_ac * p_x + b_ac o<!?7g{  
        Case "ac_y_bd_y" .o}v#W+st  
           'ac，bd线段都要求 @[v~y"tE}  
           k_ac = acy / acx {Hk}Kow  
           b_ac = p1y - k_ac * p1x W(/h Vt  
           k_bd = bdy / bdx lUMdrt0@z  
           b_bd = p2y - k_bd * p2x %N_%J
K\{@  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) (uidNq
 
           p_y = k_ac * p_x + b_ac Ny
uQMU  
        End Select xe$_aBU  
      rt(1) = p_x "J3x_~,[4m  
      rt(2) = p_y P1f[%1  
     ?Ss!e$jf  
'计算最大半径 ??/ 'kmd  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) v(%*b,^  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) l9H!au=  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) +qdEq_m  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) Uoix  
Dim bb(5) As Single Ef{Vp;]  
  bb(1) = rr1 '/%H3A#L  
  bb(2) = rr2 Yu`~U,m  
  bb(3) = rr3 FXU8[j0P_G  
  bb(4) = rr4 pI<f) r  
  nb = rr1
h!9ei6  
For i = 1 To 4 dUdT7ixo  
    If nb <= bb(i) Then J9S>yLQK  
       nb = bb(i) ={Qi0Pvt  
    End If J<lO= +mg  
Next i k$}fWR  
    rt(0) = Sqr(nb) w@fi{H(R  
    rr = rt() Fv`,3aNB  
  End If cQ_Hp <D  
         Yu2Bkq+  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  0"bcdG<}  

C3YT1tK  
有热压工艺方面的人才或者资料分享下； D d</`iUq  
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 tZG:Pr1U@  

高手真多！

楼主威武霸气.