[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： )Qo6bei!  
{k)MC)%  

描述:请输入描述

图片:2.jpg

Xak~He  

关键点说几个： aH~il!K  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） UR\*KR;yM  
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  [g/g(RL  
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 mT9TSW}  

以下是几个重要的函数： )S5Q5"j&=f  
1.判断点在区域中函数 %8v?dB;>x`  
2.计算夹角函数 0)nU[CY  
3.转置函数 ~+1t17  
4.得到区域中心点，及区域半径函数 @-W)(9kZ|  
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） m!PN1$9V  
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'{  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single
Z*oGVr g  
   cax = x2 - x1 PB`94W  
   cay = y2 - y1 X09&S4  
   cbx = x2 - x3 gXF.e.uU  
   cby = y2 - y3 PsTwJLY   
   mo_jj = cax * cbx + cay * cby 1c\$ziB  
   mo_ca = Sqr(cax * cax + cay * cay) khyVuWN  
   mo_cb = Sqr(cbx * cbx + cby * cby) -ERDWY  
   cos_acb = mo_jj / (mo_ca * mo_cb) tW 9vo-{+  
   'ff_cos = cos_acb UGAP$_j ]P  
   If cos_acb >= 1 Then :V >Z|?[*H  
   nn = 0 OpiN,>;  
   ElseIf cos_acb <= -1 Then mH;\z;lyK  
   nn = 3.14159265258979 +H+OYQ>^  
   Else i5rAb<q`  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) zEa3a  
   End If k/*r2 C  
   'ff_angle = nn o8Tt|Lxb$8  
   ff_angle = nn * 180 / 3.14159265258979 RU@`+6j+  
End Function

'判断点在区域内函数 3Ju<jX
oo!  
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 Z+E@B>D7A^  
Dim aob, boc, cod, doa, sum As Single \y{C>!WX4  
  If ppx = p1x And ppy = p1y Then s<aJ pi{n4  
     point_in = True )]?sCNb  
     Exit Function r 5:DIA!  
  End If IL&Mf9m  
  If ppx = p2x And ppy = p2y Then H71LJfH  
     point_in = True YiB^m  
     Exit Function *i&ks>4N  
  End If ([^1gG+>J  
   If ppx = p3x And ppy = p3y Then IrM Ws86;  
     point_in = True 
`!  
     Exit Function &KT*rL  
  End If zcy!YB  
     $O?&!8);,  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) iJT_*,P^  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) >6KuZ_  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y)  GMrjZ  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) IyOb0WiEj  
    sum = aob + boc + cod + doa }f/ 1  
    If 360.01 > sum And sum > 359.99 Then t*iKkV^aE  
       point_in = True MQ7N8@!t  
    Else "sdzm%  
       point_in = False V+(1U|@~  
    End If wa5wkuS)ld  
End Function

'得到点半径,得到交点坐标函数 NO+.n)etGb  
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() 0}$Zr*|;Y  
    '求得中心点坐标 H`d595<=i;  
Dim tt As String ^ ~'&K e  
Dim rt(3) As Single P{-j^'y  
    '判断是否平行 Tr*3:J }  
   acx = p3x - p1x B:J([@\'  
   acy = p3y - p1y piULIZ0  
   bdx = p4x - p2x H65><38X/  
   bdy = p4y - p2y ]Dec/Nnj  
   If acx * bdy = acy * bdx Then W|'7)ph  
      rt(0) = 0 /N'0@q  
      Exit Function \MI2^JN  
   Else 3Xcjr2]~  
      '判断斜率存在否 3dheT}XV?p  
      If p1x = p3x And p2x <> p4x Then X$BN&DD  
         tt = "ac_n_bd_y" <hkSbJF  
      ElseIf p1x <> p3x And p2x = p4x Then 3b{ 7Z 2  
         tt = "ac_y_bd_n" +-2o b90_m  
      ElseIf p1x <> p3x And p2x <> p4x Then kD;1+lNz  
         tt = "ac_y_bd_y" Bie#GKc  
      End If H{M7_1T  
    Select Case tt `xv2,Z9<  
         Case "ac_n_bd_y" S1$lNB  
            'bd线段方程 Rxb?SBa  
            k_bd = bdy / bdx GBeWF-`B  
            b_bd = p2y - k_bd * p2x ,=>W
s:j  
            p_x = p1x O2{~Q{p  
            p_y = k_bd * p_x + b_bd L)(JaZyV5  
         Case "ac_y_bd_n" hQ7-m.UZw  
            'ac线段方程 .,h>2;f  
            k_ac = acy / acx p+7G  
            b_ac = p1y - k_ac * p1x Cf
s2tN  
            p_x = p2x 0{Uc/  
            p_y = k_ac * p_x + b_ac L!;"73,&(8  
        Case "ac_y_bd_y" {&dbxj-'  
           'ac，bd线段都要求 w :nYsuF  
           k_ac = acy / acx $;iMo/  
           b_ac = p1y - k_ac * p1x H2kib4^i  
           k_bd = bdy / bdx P K+rr.k]  
           b_bd = p2y - k_bd * p2x j)nL!":O  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) `^v=*&  
           p_y = k_ac * p_x + b_ac eR3v=Q  
        End Select 2NMg+Lt8v  
      rt(1) = p_x )fy-]Ky *  
      rt(2) = p_y ES}V\k*}  
     =e)t,YVm  
'计算最大半径 ,Iv eKk5W  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ZWmS6?L.  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) o%yfR.M6$  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) r=Tz++!  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) \+)aYP2Hu  
Dim bb(5) As Single dl]pdg<  
  bb(1) = rr1 R?t_tmKXC!  
  bb(2) = rr2 y#T.w0*  
  bb(3) = rr3 .
}9Lj  
  bb(4) = rr4 m>{a<N  
  nb = rr1 VQ"Z3L3-4  
For i = 1 To 4 gU&y5s~  
    If nb <= bb(i) Then lfw|Q@  
       nb = bb(i) Wu~cy}\  
    End If ,B~5;/|  
Next i : E`78  
    rt(0) = Sqr(nb) n!-]f.=P  
    rr = rt() *z
'v  
  End If J Bgq2  
         T095]*Hm  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  T+x /J]A  

Yecdw'BW?  
有热压工艺方面的人才或者资料分享下； ]#[4eaCg  
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 kL8E#  

高手真多！

楼主威武霸气.