[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： Rhh5r0 \5  
AE!DftI  
9}4P%>_  

关键点说几个： QND{3Q  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） +(n&>75  
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 91%QO?hz  
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 j"6r]nc&  

以下是几个重要的函数： ..jc^'L  
1.判断点在区域中函数 We%HdTKT  
2.计算夹角函数 e4:,W+g,9  
3.转置函数 t~vOm   
4.得到区域中心点，及区域半径函数 l~ 3H
"  
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） sBUK v(U)  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 ~>2DA$Ec  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 8ckcTNPu  
   cax = x2 - x1 S
^5EG;[  
   cay = y2 - y1 v67utISNI  
   cbx = x2 - x3 r0MUv}p#|L  
   cby = y2 - y3 R1,.H92  
   mo_jj = cax * cbx + cay * cby ]IF QD  
   mo_ca = Sqr(cax * cax + cay * cay) p~v rr 5  
   mo_cb = Sqr(cbx * cbx + cby * cby) K!AW8FnHkZ  
   cos_acb = mo_jj / (mo_ca * mo_cb) yT3q~#:  
   'ff_cos = cos_acb =`&7pYd,
 
   If cos_acb >= 1 Then oc|%|pmRd<  
   nn = 0 .8.4!6~@  
   ElseIf cos_acb <= -1 Then nky%Eb[\  
   nn = 3.14159265258979 Ca2He}r`  
   Else N*^iOm]Y  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) @%FLT6MY  
   End If SRP.Mqg9  
   'ff_angle = nn 1\t#*N  
   ff_angle = nn * 180 / 3.14159265258979 \OzPDN  
End Function

'判断点在区域内函数 xs}3=&c(  
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 @$*LU:[  
Dim aob, boc, cod, doa, sum As Single 0[ BPmO6  
  If ppx = p1x And ppy = p1y Then 2 -C*RHRx  
     point_in = True >N bb0T  
     Exit Function u3k{s  
  End If ahUc;S:v#  
  If ppx = p2x And ppy = p2y Then nOQvBc  
     point_in = True llE_-M2gH  
     Exit Function vVyX[
ZZ  
  End If sX c
|++  
   If ppx = p3x And ppy = p3y Then C f(g  
     point_in = True 9j8<Fs0M  
     Exit Function N?3BzI%?  
  End If IQ]tcSQl  
     s[n*fV']A  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 05ZF>`g*  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) xgQ&'&7l  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) (/[wM>q:r  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 0Q{^BgW  
    sum = aob + boc + cod + doa y?-zQs0  
    If 360.01 > sum And sum > 359.99 Then Q~-MB]'  
       point_in = True JW2~ G!@  
    Else T$pBgS>  
       point_in = False $gPR3*0  
    End If &57s//PrX  
End Function

'得到点半径,得到交点坐标函数 4<<T#oW.:G  
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() S&z8-D=8k  
    '求得中心点坐标 C|g]Y 7  
Dim tt As String hMQh?sF/  
Dim rt(3) As Single }WM!e"  
    '判断是否平行 $guaUe[x  
   acx = p3x - p1x 7 P/1'f3  
   acy = p3y - p1y (>M@Ukam:  
   bdx = p4x - p2x X{-901J1  
   bdy = p4y - p2y  .H7xG'$  
   If acx * bdy = acy * bdx Then x2$Y"b?vz  
      rt(0) = 0 /;V:<mekf  
      Exit Function ]`T*}$|  
   Else aF5=k:k  
      '判断斜率存在否 x!;;;iS  
      If p1x = p3x And p2x <> p4x Then Ek,$XH  
         tt = "ac_n_bd_y" NKRI|'Y,  
      ElseIf p1x <> p3x And p2x = p4x Then dW} m44X  
         tt = "ac_y_bd_n" l<dtc[  
      ElseIf p1x <> p3x And p2x <> p4x Then BU=;r
z!;  
         tt = "ac_y_bd_y" 7CV}QV}G  
      End If V)#rP?Y  
    Select Case tt [;,Xp/  
         Case "ac_n_bd_y" A#x_>fV  
            'bd线段方程 &eY&6I  
            k_bd = bdy / bdx U "kD)\  
            b_bd = p2y - k_bd * p2x "C'T>^qw*  
            p_x = p1x /6Olq6V  
            p_y = k_bd * p_x + b_bd tEjT$`6hp  
         Case "ac_y_bd_n" 6o=Q;Mezl  
            'ac线段方程 *di}rQHm  
            k_ac = acy / acx NjP7?nXSx  
            b_ac = p1y - k_ac * p1x [
a!*m<  
            p_x = p2x ^Y?Y5`!Q  
            p_y = k_ac * p_x + b_ac tVqc!][  
        Case "ac_y_bd_y" )9s 6(Iu  
           'ac，bd线段都要求 M\6u4p!G!  
           k_ac = acy / acx ]m@p? A$  
           b_ac = p1y - k_ac * p1x hB??~>i3  
           k_bd = bdy / bdx M~LYq
  
           b_bd = p2y - k_bd * p2x %h"%G=:  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) Vk?US&1q}  
           p_y = k_ac * p_x + b_ac 5KRI}f  
        End Select !lk9U^wnd  
      rt(1) = p_x bXRSKp[$  
      rt(2) = p_y 87q~ nk  
     q:-1ul  
'计算最大半径 t^SND{[WcM  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) WYY&MHp  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) \Ws$@J-M  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) HrH! 'bd  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) #1<Jwt+  
Dim bb(5) As Single c'&\[b(m  
  bb(1) = rr1 8rpr10;U  
  bb(2) = rr2 `z~L
0h  
  bb(3) = rr3 2R>!Wj'G+o  
  bb(4) = rr4 KxUO=v<u  
  nb = rr1 vCsJnKqK  
For i = 1 To 4 -PLh|  
    If nb <= bb(i) Then >@?`n}r|  
       nb = bb(i) s]Qo'q
2  
    End If L]#b=Y  
Next i /\d@AB^5I  
    rt(0) = Sqr(nb) NNn sq@?6  
    rr = rt() 7 jiy9[  
  End If bguTWI8bk  
         I/Q~rVt  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  M`H@ % M  

.x][ _I>  
有热压工艺方面的人才或者资料分享下； a]@BS6  
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 y=LN|vkQ  

高手真多！

楼主威武霸气.