[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： eZLMP  
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关键点说几个： ;V5yXNQ  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ,Hn^z<f   
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 wJ+Aw  
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 #1.YKo  

以下是几个重要的函数： H%F>@(U  
1.判断点在区域中函数 \ I`p|&vG  
2.计算夹角函数 Q{g;J`Z)p  
3.转置函数 \G|%Zw|  
4.得到区域中心点，及区域半径函数 3AcD,,M>>  
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） BX+.0M  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 x#.C4O09  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single p>vU?eF  
   cax = x2 - x1 Vr[czfROz'  
   cay = y2 - y1 t"072a  
   cbx = x2 - x3 4QOEw-~w&s  
   cby = y2 - y3 !
k3e\v|  
   mo_jj = cax * cbx + cay * cby :#~U<C@o  
   mo_ca = Sqr(cax * cax + cay * cay) .xhK'}l[  
   mo_cb = Sqr(cbx * cbx + cby * cby) q$(5Vd:  
   cos_acb = mo_jj / (mo_ca * mo_cb) #|GSQJ$F)`  
   'ff_cos = cos_acb 'G\XXf%J  
   If cos_acb >= 1 Then 6z0@I*  
   nn = 0 Vwk#qgnX  
   ElseIf cos_acb <= -1 Then r}#\BbCv;7  
   nn = 3.14159265258979 0|&\'{  
   Else 0& >H^  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 94skkEj  
   End If o2z]dTJ}o  
   'ff_angle = nn G;NF5`*4mc  
   ff_angle = nn * 180 / 3.14159265258979 PO:"B6  
End Function

'判断点在区域内函数 No]~jnqDM  
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 .itw04Uru  
Dim aob, boc, cod, doa, sum As Single Lip4)Y [  
  If ppx = p1x And ppy = p1y Then q9w~A-Oh`1  
     point_in = True ^7zu<lX  
     Exit Function z#BR5jF  
  End If s,#>m*Rh  
  If ppx = p2x And ppy = p2y Then  |@NiW\O  
     point_in = True kmzH'wktt  
     Exit Function Bqma\1cgb  
  End If Zo1,1O  
   If ppx = p3x And ppy = p3y Then ]Q]W5WDe:  
     point_in = True 4DZ-bt'  
     Exit Function ]smkTo/  
  End If uqz]J$
 
     D}8EERb  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) Eu"_
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    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) C8FB:JNJV  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) >pUtwIP  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) p<=$&*  
    sum = aob + boc + cod + doa 4pw6bK,s2\  
    If 360.01 > sum And sum > 359.99 Then 87hq{tTs]  
       point_in = True =zQN[  
    Else eX@L3BKp  
       point_in = False N F)~W#  
    End If #o1=:PQaC  
End Function

'得到点半径,得到交点坐标函数 9B;{]c  
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() '],J$ge  
    '求得中心点坐标 9a8cRt6knO  
Dim tt As String #%DE;  
Dim rt(3) As Single T=ev[ mS  
    '判断是否平行 6j ~#[  
   acx = p3x - p1x UX7t`l2R  
   acy = p3y - p1y 5oAK8I  
   bdx = p4x - p2x p5G?N(l  
   bdy = p4y - p2y Jv^h\~*jH  
   If acx * bdy = acy * bdx Then ;^Dpl'v%\  
      rt(0) = 0 wmTb97o
 
      Exit Function eA<0$Gs,h  
   Else -B +4+&{T  
      '判断斜率存在否 )ut&@]  
      If p1x = p3x And p2x <> p4x Then B {>7-0  
         tt = "ac_n_bd_y" =E.wv  
      ElseIf p1x <> p3x And p2x = p4x Then YPxM<Gfa8  
         tt = "ac_y_bd_n" .
mR8q+I6  
      ElseIf p1x <> p3x And p2x <> p4x Then {;2PL^i  
         tt = "ac_y_bd_y" YOcO4   
      End If a|X a3E  
    Select Case tt GWfL  
         Case "ac_n_bd_y" v/_  
            'bd线段方程 JD|=>)  
            k_bd = bdy / bdx 'dn]rV0(C  
            b_bd = p2y - k_bd * p2x  094o'k  
            p_x = p1x W)bLSL]`E  
            p_y = k_bd * p_x + b_bd gw!vlwC&T  
         Case "ac_y_bd_n" 7<*yS310
 
            'ac线段方程 [@.!~E)P  
            k_ac = acy / acx ~A\G
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            b_ac = p1y - k_ac * p1x 6e
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            p_x = p2x {z{bY\  
            p_y = k_ac * p_x + b_ac o4Om}]Ti  
        Case "ac_y_bd_y" tS6qWtE  
           'ac，bd线段都要求 %%[LKSTb  
           k_ac = acy / acx I`!<9OTBj  
           b_ac = p1y - k_ac * p1x VXwU?_4J.  
           k_bd = bdy / bdx cz8T  
           b_bd = p2y - k_bd * p2x jWA(C;W  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) *_d7E   
           p_y = k_ac * p_x + b_ac 9P+-#B  
        End Select 9w7n1k.  
      rt(1) = p_x koug[5T5  
      rt(2) = p_y EFM5,gB.m  
     eceP0x  
'计算最大半径 %WjXg:R  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) te-jfmu2  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) \XZ/v*d0  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) <<][hQs  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 9dx/hFA  
Dim bb(5) As Single Q~#Wf?  
  bb(1) = rr1 &O
H={Au  
  bb(2) = rr2 xqu}cz  
  bb(3) = rr3 X aMJDa|M  
  bb(4) = rr4 )6Fok3u  
  nb = rr1 k5'Vy8q  
For i = 1 To 4 w9EOC$|Y  
    If nb <= bb(i) Then 0Qf,@^zL*  
       nb = bb(i) 3[Qxd{8r  
    End If zBzZxK>$  
Next i "ut39si  
    rt(0) = Sqr(nb) )"7iJb<E  
    rr = rt() \!.B+7t=I  
  End If *nkoPVpC  
         i9,geQ7d  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  iy.p n  

zZPO&akB"  
有热压工艺方面的人才或者资料分享下； UmP/h@8  
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 %v M-mbX  

高手真多！

楼主威武霸气.