[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： `?3f76}h  
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关键点说几个： Hcu!bOQ  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） %\T,=9tD\  
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 m x |V)  
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 86Q3d%;-yo  

以下是几个重要的函数： "}*D,[C5e  
1.判断点在区域中函数 /u4RZ|&as  
2.计算夹角函数 `7:uc@  
3.转置函数 nco.j:  
4.得到区域中心点，及区域半径函数 wPjq B{!Q  
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） Rq5'=L  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 K!&W}_@l  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single WT<
}3(S'?  
   cax = x2 - x1 CE`]
X;#y  
   cay = y2 - y1 nXLz<wE  
   cbx = x2 - x3 7b>_vtrt  
   cby = y2 - y3 xj>P5\mW#  
   mo_jj = cax * cbx + cay * cby 2M
Rd  
   mo_ca = Sqr(cax * cax + cay * cay) b},2A'X  
   mo_cb = Sqr(cbx * cbx + cby * cby) 9efey? z  
   cos_acb = mo_jj / (mo_ca * mo_cb)
jL\j$'KC  
   'ff_cos = cos_acb Qq`S=:}~x  
   If cos_acb >= 1 Then <}{<FXk[  
   nn = 0 =6Ok4Z  
   ElseIf cos_acb <= -1 Then Za{O9Qc?D|  
   nn = 3.14159265258979 ,Zn6T"[$  
   Else \(i'iC  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) l'EO@D/M  
   End If uS`}  
   'ff_angle = nn ?uSoJM`wa!  
   ff_angle = nn * 180 / 3.14159265258979 .Q!d[vL  
End Function

'判断点在区域内函数 i#*[, 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 Ux=~-}<-w  
Dim aob, boc, cod, doa, sum As Single `&D#P%  
  If ppx = p1x And ppy = p1y Then r89AX{:  
     point_in = True kFp^?+WI%H  
     Exit Function %Z_O\zRqy)  
  End If [WR"#y  
  If ppx = p2x And ppy = p2y Then @\?ubF  
     point_in = True B8Fb$  
     Exit Function ,6{z  
  End If :1*E5pX0n  
   If ppx = p3x And ppy = p3y Then l{dsm1#W~  
     point_in = True fY&TI}Y  
     Exit Function n\((#<&
 
  End If Sxq@W8W  
      bH
G<B
 
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) ,<%uG6/",g  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) ^5E9p@d"J  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) kku<0<(N  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ]oV{JR]  
    sum = aob + boc + cod + doa Q<V(#)*  
    If 360.01 > sum And sum > 359.99 Then v=@y7P1  
       point_in = True nm1dd{U6^  
    Else X=whZ\EZ  
       point_in = False * |,N/e  
    End If 5K1cPU~o_b  
End Function

'得到点半径,得到交点坐标函数 !4afU:  
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() !Sn|!:N4  
    '求得中心点坐标 |qMG@  
Dim tt As String Bn]=T  
Dim rt(3) As Single wU+r]SK@  
    '判断是否平行 :+/8n+@#  
   acx = p3x - p1x cRf F!EV  
   acy = p3y - p1y CImp
,k0  
   bdx = p4x - p2x %FYhq:j  
   bdy = p4y - p2y g}0K@z3  
   If acx * bdy = acy * bdx Then Br
9j)1;  
      rt(0) = 0 =T9h7c R  
      Exit Function #sc!H4  
   Else 62HA[cr&)  
      '判断斜率存在否 Yc]V+NxxQ  
      If p1x = p3x And p2x <> p4x Then V
#w$|2  
         tt = "ac_n_bd_y" |s! _;6  
      ElseIf p1x <> p3x And p2x = p4x Then teS>t!d  
         tt = "ac_y_bd_n" 1.+O2qB  
      ElseIf p1x <> p3x And p2x <> p4x Then L-w3A:jk  
         tt = "ac_y_bd_y" {C5:as  
      End If UAF$bR  
    Select Case tt p*c(dkOe8  
         Case "ac_n_bd_y" DKt98;  
            'bd线段方程 IVh5SS  
            k_bd = bdy / bdx `6VnL)  
            b_bd = p2y - k_bd * p2x X0 |U?Ib?  
            p_x = p1x ch8VJ^%Ra1  
            p_y = k_bd * p_x + b_bd ,pD sU@  
         Case "ac_y_bd_n" 0FcDO5ia  
            'ac线段方程 ="$w8iRU  
            k_ac = acy / acx ,CyX*k8o  
            b_ac = p1y - k_ac * p1x <CVX[R]U  
            p_x = p2x yb'
,nGl~  
            p_y = k_ac * p_x + b_ac J`5+Zngr  
        Case "ac_y_bd_y" Jai]z  
           'ac，bd线段都要求 90}vFoy  
           k_ac = acy / acx &)k=ccm  
           b_ac = p1y - k_ac * p1x v
,}C~L3  
           k_bd = bdy / bdx /FN:yCf  
           b_bd = p2y - k_bd * p2x @HbRfD/!  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) gg#9I(pX  
           p_y = k_ac * p_x + b_ac x >ah,  
        End Select t[q2W"#.  
      rt(1) = p_x V| Fo@  
      rt(2) = p_y YxM\qy{Vr  
     1!^BcrG.  
'计算最大半径 5Lc@=,/0  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ,Sgo_bC/|  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) }BM`4/  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) \L(jNN0_R  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) neu+h6#H  
Dim bb(5) As Single b~&cYk'  
  bb(1) = rr1 %EU_OS(u.{  
  bb(2) = rr2 8)8~c@  
  bb(3) = rr3 R_G2C@y*  
  bb(4) = rr4  {8K  
  nb = rr1 bji#ID2]%  
For i = 1 To 4 lx2#C9L_  
    If nb <= bb(i) Then CCG5:xS  
       nb = bb(i) M%_*vD  
    End If /UunWZ u%  
Next i 9!=4}:+  
    rt(0) = Sqr(nb) A]m*~Vj]  
    rr = rt() N>3{!K>/Y:  
  End If +>C26Q  
         RCTqV.L  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  D_F1<q  

 1^hG}#6_  
有热压工艺方面的人才或者资料分享下； @?tR-L<u  
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 :p<:0W2!  

高手真多！

楼主威武霸气.