[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： EMejvPnZO  
eL!G, W  
#TSLgV'U  

关键点说几个： -Q8pWtt  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） wB( igPi  
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 2WOdTM{u  
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 K`2a{`  

以下是几个重要的函数： %]Nz54!  
1.判断点在区域中函数 +o/;bm*U<K  
2.计算夹角函数 I/)dXk~  
3.转置函数 ^HL#)fK2I  
4.得到区域中心点，及区域半径函数 XW Y0WDh:  
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） *qBMt[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 65J'uN  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single xG}eiUbM`  
   cax = x2 - x1 "3j0)  
   cay = y2 - y1 FJL9
x,%6  
   cbx = x2 - x3 iKS9Xss8  
   cby = y2 - y3 U0N[~yW(t1  
   mo_jj = cax * cbx + cay * cby m&A/IW,.  
   mo_ca = Sqr(cax * cax + cay * cay) IW BVfN->}  
   mo_cb = Sqr(cbx * cbx + cby * cby) >LU*F|F]B  
   cos_acb = mo_jj / (mo_ca * mo_cb) _Wb-&6{  
   'ff_cos = cos_acb " ^eq5?L  
   If cos_acb >= 1 Then w6"LHy[  
   nn = 0 _1R`xbV  
   ElseIf cos_acb <= -1 Then wc,y+C#V  
   nn = 3.14159265258979 !6 $>|  
   Else 5^d%+*l;q  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) &&<^wtznO  
   End If ^3yjE/Wi"  
   'ff_angle = nn .D>lv_kp  
   ff_angle = nn * 180 / 3.14159265258979 -owfuS?i=  
End Function

'判断点在区域内函数 R{rV1j#@!a  
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 RU>vnDaC  
Dim aob, boc, cod, doa, sum As Single %!$-N!e  
  If ppx = p1x And ppy = p1y Then EqmJXDm  
     point_in = True k?8W2fC  
     Exit Function P<&/$x6  
  End If Q.] )yqX6  
  If ppx = p2x And ppy = p2y Then N^ET qg  
     point_in = True }mGD`5[`  
     Exit Function jI
V? p  
  End If uE|[7,D7;u  
   If ppx = p3x And ppy = p3y Then t/D Q<B_  
     point_in = True &Egn`QU  
     Exit Function }n7e_qy4  
  End If x
XYens}  
     dB,#`tc=,  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) eJA{]^Zf  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) Uy1xNb/d  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 2Ee1mbZVw8  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ppD~xg]  
    sum = aob + boc + cod + doa g|HrhUT;  
    If 360.01 > sum And sum > 359.99 Then w+Z};C  
       point_in = True 2r0!h98  
    Else X]*/]Xx  
       point_in = False &sgwY  
    End If :V2Q n-N  
End Function

'得到点半径,得到交点坐标函数 gWo~o]f  
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() 9GwsQ \  
    '求得中心点坐标 ;wxt<   
Dim tt As String zn!  
Dim rt(3) As Single z\Y^x9  
    '判断是否平行 |P7f^0idk  
   acx = p3x - p1x /xbZC{R  
   acy = p3y - p1y mO> M=2A  
   bdx = p4x - p2x
5O W(] y|  
   bdy = p4y - p2y Kc\'s65.]  
   If acx * bdy = acy * bdx Then P/9J!.Cm  
      rt(0) = 0 6<$|;w-OV  
      Exit Function ;_aoM&  
   Else J-<B*ot+lX  
      '判断斜率存在否 jGhg~-m  
      If p1x = p3x And p2x <> p4x Then d)ZSzq  
         tt = "ac_n_bd_y" Le JlTWotC  
      ElseIf p1x <> p3x And p2x = p4x Then 9prsL#Fn  
         tt = "ac_y_bd_n" 15 11<,  
      ElseIf p1x <> p3x And p2x <> p4x Then gtGKV  
         tt = "ac_y_bd_y"
N:[;E3?O  
      End If UjOhaj "h  
    Select Case tt }n%Rl\p  
         Case "ac_n_bd_y" Q_.c~I}yV  
            'bd线段方程 }t3FAy(%  
            k_bd = bdy / bdx <^_Vl8%  
            b_bd = p2y - k_bd * p2x f$|v0Xs  
            p_x = p1x ,HkhKbQ  
            p_y = k_bd * p_x + b_bd xt,L* B  
         Case "ac_y_bd_n" cu?(P;mQi  
            'ac线段方程 {4aY}= -Q*  
            k_ac = acy / acx ]"g >>N  
            b_ac = p1y - k_ac * p1x &E riskI  
            p_x = p2x %O=V4%"m\  
            p_y = k_ac * p_x + b_ac s [F' h-y  
        Case "ac_y_bd_y" ]</4#?_  
           'ac，bd线段都要求 X7d.Ie  
           k_ac = acy / acx hYXZ21(K#  
           b_ac = p1y - k_ac * p1x -yQ\3wli`  
           k_bd = bdy / bdx 3e6Y
 
           b_bd = p2y - k_bd * p2x #]DZrD&q  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) ![]I%'s  
           p_y = k_ac * p_x + b_ac qZsddll  
        End Select LsQ8sFP_"  
      rt(1) = p_x |z]2KjF&w-  
      rt(2) = p_y {Y:ZY+  
     G+X[R^RD  
'计算最大半径 i;hc]fYb=K  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) IPR tm!  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) _d| 62VS  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 71"JL",  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) Y0B1xL@  
Dim bb(5) As Single k\#-6evT  
  bb(1) = rr1 0yC`9g)(  
  bb(2) = rr2 2ZG1n#  
  bb(3) = rr3 MhI)7jj`mt  
  bb(4) = rr4 /4 LR0`A'  
  nb = rr1 RYZE*lWUh  
For i = 1 To 4 _`Q It>R  
    If nb <= bb(i) Then OW^2S_H5  
       nb = bb(i) Sj{ia2AE_  
    End If Pb8Z))9j  
Next i N.{jM[\F  
    rt(0) = Sqr(nb) bLM"t0  
    rr = rt() CSL{Q  
  End If 2>}\XKF).  
         1.0!H.>q  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  gG(fQ 89U"  

A>o*t=5  
有热压工艺方面的人才或者资料分享下； ) l:[^$=,  
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 eg;~zv  

高手真多！

楼主威武霸气.