[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： "k/@tX1:R  
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关键点说几个： o~B=[  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） DS yE   
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 +zvK/Fj2q  
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 hSmM OS{  

以下是几个重要的函数： U,N4+F}FR  
1.判断点在区域中函数 xUYSD  
2.计算夹角函数 M6>l%[  
3.转置函数 S1."2AxO  
4.得到区域中心点，及区域半径函数 lc^%:#@  
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） `#hy'S:e  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 E?-K_p  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single /Wa+mp  
   cax = x2 - x1 tU(6%zvR  
   cay = y2 - y1 D4G{= Y}G  
   cbx = x2 - x3 m$kmoY/  
   cby = y2 - y3 WrV|<%EQh  
   mo_jj = cax * cbx + cay * cby JO$0Z  
   mo_ca = Sqr(cax * cax + cay * cay) 0 [s1!Cm!i  
   mo_cb = Sqr(cbx * cbx + cby * cby) +1rJ;G  
   cos_acb = mo_jj / (mo_ca * mo_cb) g$+3IVq&  
   'ff_cos = cos_acb ixp%aRRP  
   If cos_acb >= 1 Then 2iUF%>  
   nn = 0 %V$^CWOy  
   ElseIf cos_acb <= -1 Then F>&8b^v bn  
   nn = 3.14159265258979 %Z.!Bm:  
   Else
It4F;Ah  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ?
VJ Fp^Ra  
   End If Tb}b*d3  
   'ff_angle = nn V{8mx70  
   ff_angle = nn * 180 / 3.14159265258979 vK$W)(Z  
End Function

'判断点在区域内函数 a+Z/=YUR  
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 Wg#>2
)>  
Dim aob, boc, cod, doa, sum As Single y+c+/L8  
  If ppx = p1x And ppy = p1y Then 9Gy1T3y5"  
     point_in = True rT
x]
%{  
     Exit Function oRCj]9I$  
  End If ,i'>+Ix<  
  If ppx = p2x And ppy = p2y Then /m%;wH|6%  
     point_in = True Baq&>]  
     Exit Function (u~@@d"  
  End If FN G]  
   If ppx = p3x And ppy = p3y Then Z/%>/  
     point_in = True NZv1dy`fa  
     Exit Function W&*0F~  
  End If /WfpA\4S  
     1B2>8N  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) Ug/b;( dJ'  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) BeBa4s  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) T$SGf.-  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) &)1+WrU  
    sum = aob + boc + cod + doa W<\KRF$S;  
    If 360.01 > sum And sum > 359.99 Then F6yMk%  
       point_in = True tX)^$3A  
    Else *!vwW T  
       point_in = False oPl^tzO  
    End If xM[m(m  
End Function

'得到点半径,得到交点坐标函数 z]K:Amp;Z  
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() \s<L2uRj  
    '求得中心点坐标 Kx7s d i  
Dim tt As String `bNY[Gv>)  
Dim rt(3) As Single C`Zz\DNG@  
    '判断是否平行 "5,'K~hz  
   acx = p3x - p1x zr2oU '+  
   acy = p3y - p1y 4YMX
;W  
   bdx = p4x - p2x E{*d`n  
   bdy = p4y - p2y OF-$*  
   If acx * bdy = acy * bdx Then "=@X>jUc  
      rt(0) = 0 VBo=*gn,$  
      Exit Function d[=~-[  
   Else "dQ02y  
      '判断斜率存在否 @p"m{  
      If p1x = p3x And p2x <> p4x Then br`cxgZ0"  
         tt = "ac_n_bd_y" g[4pG`z  
      ElseIf p1x <> p3x And p2x = p4x Then \xR1|M  
         tt = "ac_y_bd_n" H[S[ y  
      ElseIf p1x <> p3x And p2x <> p4x Then MfQ
9d9  
         tt = "ac_y_bd_y" ](-zt9, N;  
      End If ~lib~Y'-  
    Select Case tt bi~1d"j  
         Case "ac_n_bd_y" opqY@>Vh&  
            'bd线段方程 gaV>WF  
            k_bd = bdy / bdx grrM[Y7#~b  
            b_bd = p2y - k_bd * p2x F=EG#<@u  
            p_x = p1x Ce_k&[AJF  
            p_y = k_bd * p_x + b_bd pr-=<[ d  
         Case "ac_y_bd_n" 9X/]O<i,Es  
            'ac线段方程 mBN+c9n/  
            k_ac = acy / acx %?2y2O,;  
            b_ac = p1y - k_ac * p1x gjFpM.D-.  
            p_x = p2x eCFMWFhC  
            p_y = k_ac * p_x + b_ac , Ox$W  
        Case "ac_y_bd_y" }JI
@f14  
           'ac，bd线段都要求 H< 51dJn~  
           k_ac = acy / acx }l"pxp1K  
           b_ac = p1y - k_ac * p1x >UNx<=ry  
           k_bd = bdy / bdx ?&Ug"$v  
           b_bd = p2y - k_bd * p2x ;|U !
\Xp  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) [eLMb)n  
           p_y = k_ac * p_x + b_ac zCji]:  
        End Select z|bAZKSRYx  
      rt(1) = p_x ;-kC&GZf  
      rt(2) = p_y O#MaZ.=  
     :_k5[KT.]9  
'计算最大半径 L0.F}~S  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) qf T71o(  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) FRhHp(0}5  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) F ~SA3M:  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 0uL*-/|  
Dim bb(5) As Single P"[\p|[U  
  bb(1) = rr1 +R"Y~ m{F  
  bb(2) = rr2 Nnx dO0X  
  bb(3) = rr3 #?"^:,Y  
  bb(4) = rr4
%-fQ[@5  
  nb = rr1 zt;aB>jz#  
For i = 1 To 4 ?[?;%Y  
    If nb <= bb(i) Then 'C7$,H'  
       nb = bb(i) ?k`UQi]Q  
    End If .fAHP 5-  
Next i T].Xx`  
    rt(0) = Sqr(nb) dk/f_m  
    rr = rt() >=1Aa,_tc  
  End If r17"
i.n  
         v`hn9O  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  /]?e^akA  

ju!V1ky  
有热压工艺方面的人才或者资料分享下； ]F"P3':  
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 ^A=2#
j~H\  

高手真多！

楼主威武霸气.