[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： ~c>*3*  
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描述:请输入描述

图片:2.jpg

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关键点说几个： Y6T1_XG  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） tAfd
bt  
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 ]UG+<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 |1GR:b24  

以下是几个重要的函数： Qp{gV Ys  
1.判断点在区域中函数 |oq27*ix~m  
2.计算夹角函数 YNc
]x>  
3.转置函数 pK=$)<I"6  
4.得到区域中心点，及区域半径函数 G[4TT#  
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） {C>.fg%t  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 Mq-QWx"P  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single H`/QhE  
   cax = x2 - x1 B .p&,K  
   cay = y2 - y1 BIf E+
L(  
   cbx = x2 - x3 /\L|F?+@  
   cby = y2 - y3 fY@Y$S`Fh  
   mo_jj = cax * cbx + cay * cby ;SAurG$  
   mo_ca = Sqr(cax * cax + cay * cay) 5~T`R~Uqb  
   mo_cb = Sqr(cbx * cbx + cby * cby) 5t]}(.0+  
   cos_acb = mo_jj / (mo_ca * mo_cb) S p
xkB!  
   'ff_cos = cos_acb av>c  
   If cos_acb >= 1 Then ea3;1-b:  
   nn = 0 uGm~ Oo  
   ElseIf cos_acb <= -1 Then y:Xs/RS  
   nn = 3.14159265258979 fj X~"U  
   Else c|<*w[%C  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) (4_7ICFI  
   End If -x~h.s,  
   'ff_angle = nn >r%L=22+  
   ff_angle = nn * 180 / 3.14159265258979 &V7@ TZ  
End Function

'判断点在区域内函数 8hWBTUN  
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 )i8Hdtn  
Dim aob, boc, cod, doa, sum As Single ;xFx%^M}br  
  If ppx = p1x And ppy = p1y Then IXb]\ )  
     point_in = True Z;kRQ  
     Exit Function *yJCnoF  
  End If x)eYqH~i  
  If ppx = p2x And ppy = p2y Then 1e`/N+6u  
     point_in = True Q!DH8'|4?L  
     Exit Function s%h|>l[lKT  
  End If 5/j7C>  
   If ppx = p3x And ppy = p3y Then 4|Z;EAFx  
     point_in = True ;J|sH>i  
     Exit Function PW(4-H  
  End If pvL)BD  
     f49pIcAq  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) Jy&O4g/'5  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) q$)$?"  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) P" +!mSe^~  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) /DOV/>@5%  
    sum = aob + boc + cod + doa *Ag</g@ h  
    If 360.01 > sum And sum > 359.99 Then .?7u'%6x?{  
       point_in = True \l^L?69  
    Else qfp,5@p  
       point_in = False ~jdvxoX-  
    End If _'9
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End Function

'得到点半径,得到交点坐标函数 GE;S5X]X  
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() D$C>ZF  
    '求得中心点坐标 nx#0*r}5  
Dim tt As String ks92-%
;:  
Dim rt(3) As Single E(J@A'cX  
    '判断是否平行 Tb~|p_;o  
   acx = p3x - p1x e>yPFXSk  
   acy = p3y - p1y sywSvnPuYZ  
   bdx = p4x - p2x EfxW^zm)  
   bdy = p4y - p2y Dep.Qfv{-  
   If acx * bdy = acy * bdx Then <A{|=2<  
      rt(0) = 0 A*d Pw.  
      Exit Function L?~>eT  
   Else eVL#3|=  
      '判断斜率存在否 8<
BYAHY^  
      If p1x = p3x And p2x <> p4x Then !|!k9~v!  
         tt = "ac_n_bd_y" 0=N,y  
      ElseIf p1x <> p3x And p2x = p4x Then 3r{3HaN(^'  
         tt = "ac_y_bd_n" N?cvQR{r9  
      ElseIf p1x <> p3x And p2x <> p4x Then W+HiH`Qb]  
         tt = "ac_y_bd_y" +NML>g#F~z  
      End If XY1D<  
    Select Case tt "R8:s  
         Case "ac_n_bd_y" ITcgpK6k  
            'bd线段方程 X.~z:W+  
            k_bd = bdy / bdx p mv6m  
            b_bd = p2y - k_bd * p2x Ir%L%MuR]  
            p_x = p1x "Zk# bQ2j  
            p_y = k_bd * p_x + b_bd bv %Bo4s  
         Case "ac_y_bd_n" Y"Y%JJ.J  
            'ac线段方程 GYvD*?uBc  
            k_ac = acy / acx _~q!
<-Z  
            b_ac = p1y - k_ac * p1x )OjTn"  
            p_x = p2x ?D 8<}~Do  
            p_y = k_ac * p_x + b_ac kV>[$6  
        Case "ac_y_bd_y" @9,=|kxK  
           'ac，bd线段都要求 m+66x {M2c  
           k_ac = acy / acx UZcsMMKH  
           b_ac = p1y - k_ac * p1x
e6?iQ0  
           k_bd = bdy / bdx ^\<nOzU?  
           b_bd = p2y - k_bd * p2x  :P,g,  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) z{wW6sgPr  
           p_y = k_ac * p_x + b_ac e}@VR<h  
        End Select }~W:3A{7;  
      rt(1) = p_x :/rl \woA>  
      rt(2) = p_y zN3[W`q+m  
     eBlWwUy*6f  
'计算最大半径 _H{6{!=y  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) Q{+*F8%8V<  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) E6 g]EE  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) Whoqs_Mm{  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) kSW=DE|#}  
Dim bb(5) As Single G909R
>  
  bb(1) = rr1 r4YiXss  
  bb(2) = rr2 " V[=U13  
  bb(3) = rr3 BZJ\tPSR  
  bb(4) = rr4 ko-3`hX`  
  nb = rr1 "0*yD[2  
For i = 1 To 4 QR+xPY~  
    If nb <= bb(i) Then "Wz8f
 
       nb = bb(i) pyHU+B  
    End If $7bLw)7  
Next i GG0H3MSc  
    rt(0) = Sqr(nb) uez"{_I  
    rr = rt() <bSG|VqnH  
  End If jF$bCbAUce  
        
DB~3(r?K  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  &s(mbpV  

O[|_~v:^  
有热压工艺方面的人才或者资料分享下； ;=UkTn}N?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 e#AmtheZR  

高手真多！

楼主威武霸气.