[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： 1J<-P9 vk+  
KP:O]520  
MfYe @;m  

关键点说几个： mTs[3opg  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ?]P&3UU>0z  
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 h\.UUC&<  
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 A:p0p^*  

以下是几个重要的函数： |d,1mmv@K  
1.判断点在区域中函数 Dnd  
2.计算夹角函数 G1P m!CM=  
3.转置函数 moc_}(  
4.得到区域中心点，及区域半径函数 1F$a My?  
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） :b.#h7Qt<  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数  0J_Np  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 4y P $l  
   cax = x2 - x1 NIYAcLa@n8  
   cay = y2 - y1 *^NC5=A(
d  
   cbx = x2 - x3 S&R~*  
   cby = y2 - y3 qed; UyN  
   mo_jj = cax * cbx + cay * cby kvo741RO6  
   mo_ca = Sqr(cax * cax + cay * cay) pR~PB  
   mo_cb = Sqr(cbx * cbx + cby * cby) p?dMa_g  
   cos_acb = mo_jj / (mo_ca * mo_cb) 0dnm/'L  
   'ff_cos = cos_acb qA03EU  
   If cos_acb >= 1 Then 4q~l?*S  
   nn = 0 55yP.@i9J  
   ElseIf cos_acb <= -1 Then t(ZiQ<A  
   nn = 3.14159265258979 KH@M & >=^  
   Else );$~/H4  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) {N _v4})  
   End If 2o/AH \=2  
   'ff_angle = nn sG^b_3o)A  
   ff_angle = nn * 180 / 3.14159265258979 d;'@4NX5+  
End Function

'判断点在区域内函数 e[{LNM{/#  
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 VS 8|lgQ  
Dim aob, boc, cod, doa, sum As Single )iEK7d^-  
  If ppx = p1x And ppy = p1y Then A$^}zP'u0<  
     point_in = True v 7Pv&|  
     Exit Function <H#D/?n5  
  End If *h]qh20t  
  If ppx = p2x And ppy = p2y Then 9l(e:_`_  
     point_in = True C#vh2'  
     Exit Function Y`c\{&M6  
  End If %PyU3  
   If ppx = p3x And ppy = p3y Then C~6aX/:  
     point_in = True hbN*_[  
     Exit Function ~A"ODLgU9  
  End If N*@bJ*0  
     s7&%_!4  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) a0AI
q44  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) <Oy%  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) auS$B%  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) i8A5m@,G  
    sum = aob + boc + cod + doa J7mT&U&Ru  
    If 360.01 > sum And sum > 359.99 Then lOZ.{0{f,  
       point_in = True Tm`QZh3  
    Else {Y\hr+A  
       point_in = False {!E<hQ2<$9  
    End If >Z>*Iz,LP  
End Function

'得到点半径,得到交点坐标函数 3,iL#_+t  
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() ^3*gf}  
    '求得中心点坐标 h=)Im)  
Dim tt As String U6_
1L,W  
Dim rt(3) As Single BNaZD<<  
    '判断是否平行 >"ZTyrK  
   acx = p3x - p1x -
FE)  
   acy = p3y - p1y B#q5Ut  
   bdx = p4x - p2x yhUc]6`V.H  
   bdy = p4y - p2y }eB\k,7L  
   If acx * bdy = acy * bdx Then p>R F4  
      rt(0) = 0 )Cx8?\/c=x  
      Exit Function kqHh@]Z0'  
   Else RV&2y=eb  
      '判断斜率存在否 vy-{BH  
      If p1x = p3x And p2x <> p4x Then W*8D@a0 _  
         tt = "ac_n_bd_y"
}H^#}  
      ElseIf p1x <> p3x And p2x = p4x Then J-u,6c  
         tt = "ac_y_bd_n" z*x6V0'yt  
      ElseIf p1x <> p3x And p2x <> p4x Then A7: oq7b  
         tt = "ac_y_bd_y" u1nv'\*  
      End If BRH:5h  
    Select Case tt )rj.WK.  
         Case "ac_n_bd_y" L@G)K  
            'bd线段方程 Jr1^qY`0+  
            k_bd = bdy / bdx ,PIdPaV--  
            b_bd = p2y - k_bd * p2x 9Z#37)  
            p_x = p1x L.|GC7$0
 
            p_y = k_bd * p_x + b_bd 2%WZ-l!i  
         Case "ac_y_bd_n" P.[>x  
            'ac线段方程 2RM1-j ($  
            k_ac = acy / acx Ro%S_!  
            b_ac = p1y - k_ac * p1x crvWAsm  
            p_x = p2x 5[*MT%ms  
            p_y = k_ac * p_x + b_ac |y=CmNG,  
        Case "ac_y_bd_y" UayRT#}]  
           'ac，bd线段都要求 t`DUY3>36  
           k_ac = acy / acx H) (K  
           b_ac = p1y - k_ac * p1x wmoOp;C  
           k_bd = bdy / bdx sIELkF?.  
           b_bd = p2y - k_bd * p2x E}a3.6)p  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) $_)f|\s  
           p_y = k_ac * p_x + b_ac A+[wH(  
        End Select FtF!D
tv  
      rt(1) = p_x m"v` E7G  
      rt(2) = p_y *nC<1.JW  
     ;$0za]x  
'计算最大半径 j^64:3  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) MvRuW:  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) h[B Ft{x  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 6J=~*&  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) *X<De  
Dim bb(5) As Single WG^D$L
:  
  bb(1) = rr1 ViVYyA  
  bb(2) = rr2 _abVX#5<  
  bb(3) = rr3 3a#!^G!~  
  bb(4) = rr4 WxXVL"  
  nb = rr1 mCq*@1Lp9  
For i = 1 To 4 6 a$%  
    If nb <= bb(i) Then +_`F@^R_  
       nb = bb(i) 2QBtwlQ?[  
    End If tG#F7%+E  
Next i tv;3~Y0i  
    rt(0) = Sqr(nb) Mz"kaO  
    rr = rt() sH&8"5BT%  
  End If 7IIM8/BI  
         t@4vEKw?.X  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  
i\PN  

g|T' oK  
有热压工艺方面的人才或者资料分享下； gReaFnm  
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 V8N<%/A=  

高手真多！

楼主威武霸气.