[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： ,)!%^~v  
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关键点说几个： \I/"W#\SJo  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ]TUoXU2<x  
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 3D5adI<aq"  
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 bA$ElKT  

以下是几个重要的函数： Au/'|%2#(  
1.判断点在区域中函数  tj8o6N#  
2.计算夹角函数 F.(e}EMyNh  
3.转置函数 qC& xuu|  
4.得到区域中心点，及区域半径函数 3m21n7F4*  
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） ){u# (sW  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 EL2z&  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single zH~g5xgh  
   cax = x2 - x1 @^-f+o  
   cay = y2 - y1 )liNjY@  
   cbx = x2 - x3 |\"%Dy[m  
   cby = y2 - y3 {+kWK;1  
   mo_jj = cax * cbx + cay * cby X.q#ZpK  
   mo_ca = Sqr(cax * cax + cay * cay) U}=H1f,  
   mo_cb = Sqr(cbx * cbx + cby * cby) xs"\c7pC  
   cos_acb = mo_jj / (mo_ca * mo_cb) bZQ_j#{$  
   'ff_cos = cos_acb eSMno_Gt3  
   If cos_acb >= 1 Then LA6Ik_-F  
   nn = 0 HC>k/Gk"  
   ElseIf cos_acb <= -1 Then *_Pkb
.3R  
   nn = 3.14159265258979 mryT%zSlM  
   Else (15.?9  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) (~b0-3s  
   End If Av/y  
   'ff_angle = nn q^@*k,HG  
   ff_angle = nn * 180 / 3.14159265258979 Lr"`OzDz  
End Function

'判断点在区域内函数 ,/Y$%.Rp  
Function point_in(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single, ppx As Single, ppy As Single) As Boolean K5+ONA<c  
Dim aob, boc, cod, doa, sum As Single )L,Nh~  
  If ppx = p1x And ppy = p1y Then K*j1Fy:  
     point_in = True /"1[qT\F  
     Exit Function e#tWQM3  
  End If #Z_f/@b  
  If ppx = p2x And ppy = p2y Then p!K]cD  
     point_in = True ~~WX#Od*$  
     Exit Function 7{f{SIB  
  End If s! sG)AR.J  
   If ppx = p3x And ppy = p3y Then !t&C,@Ox  
     point_in = True <L3ig%#B  
     Exit Function ` B+Pl6l)F  
  End If \&Oc}]  
     k)fLJ9R  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) (G{2ec:?  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) NX<Q}3cC  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) T\T>\&nY+|  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) qNbgN{4  
    sum = aob + boc + cod + doa FOX0  
    If 360.01 > sum And sum > 359.99 Then Ng1[y4R}  
       point_in = True 28xLaob  
    Else Otm7j>w  
       point_in = False sRGIHT#  
    End If z8w@pT  
End Function

'得到点半径,得到交点坐标函数 Kdd5ysTQ  
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() N
s`:=  
    '求得中心点坐标 [~IFg~*,  
Dim tt As String dIvvJk8  
Dim rt(3) As Single zzyD'n7D  
    '判断是否平行 @)Sd3xw[  
   acx = p3x - p1x N< 7  
   acy = p3y - p1y 14rX:z  
   bdx = p4x - p2x 17;qJ_T)  
   bdy = p4y - p2y 2lBfc  
   If acx * bdy = acy * bdx Then a/p /<
 
      rt(0) = 0 w<=-n;2  
      Exit Function x?-kt.M  
   Else si>gYO  
      '判断斜率存在否 KH76Vts  
      If p1x = p3x And p2x <> p4x Then BYsQu.N  
         tt = "ac_n_bd_y" WzO[-csy  
      ElseIf p1x <> p3x And p2x = p4x Then ;"DI)hdz  
         tt = "ac_y_bd_n" eop7=!`-~~  
      ElseIf p1x <> p3x And p2x <> p4x Then *Mr'/qp,  
         tt = "ac_y_bd_y" !5h@uar  
      End If `}&}2k  
    Select Case tt r#'E;Yx  
         Case "ac_n_bd_y" }h`ddo  
            'bd线段方程 bmGtYv  
            k_bd = bdy / bdx AoN|&o  
            b_bd = p2y - k_bd * p2x 7W\aX*]  
            p_x = p1x E,:E u<  
            p_y = k_bd * p_x + b_bd 0@PI=JZ%  
         Case "ac_y_bd_n" i?pC[Ao-_  
            'ac线段方程 V(6ovJpA0  
            k_ac = acy / acx LDv>hzo  
            b_ac = p1y - k_ac * p1x +%RB&:K7,  
            p_x = p2x !V;glx[  
            p_y = k_ac * p_x + b_ac [+Y;w`;Fq  
        Case "ac_y_bd_y" ,*'aH z  
           'ac，bd线段都要求 *Wz\FixP0  
           k_ac = acy / acx ?o6\>[O  
           b_ac = p1y - k_ac * p1x :~+m9r  
           k_bd = bdy / bdx ?{*/VJl$  
           b_bd = p2y - k_bd * p2x wZ =*ejo  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 14;lB.$p  
           p_y = k_ac * p_x + b_ac F {T\UX  
        End Select #^&.*'z%z  
      rt(1) = p_x xSoXf0zq:  
      rt(2) = p_y j*}2AI  
     dsUY[X-<6  
'计算最大半径 Qp]-4%^Vz  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) '2.11cM3  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 2 VGGSLr  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) (qXl=e8  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) `SSUQ#@  
Dim bb(5) As Single `h|>;u   
  bb(1) = rr1 VyL|d^'f_  
  bb(2) = rr2 n^Sc*7  
  bb(3) = rr3 v&*}O  
  bb(4) = rr4 JqmKD4p  
  nb = rr1 i@XFnt  
For i = 1 To 4 i(@<KH  
    If nb <= bb(i) Then "sU ~|  
       nb = bb(i) '=eE6=m^K  
    End If =3?"s(9  
Next i Um'r6ty  
    rt(0) = Sqr(nb) @n:.D9  
    rr = rt() +4%:q~C  
  End If Jf=$h20x  
         }8cX0mZ1j  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ~~ON!l9n  

/Ki :6  
有热压工艺方面的人才或者资料分享下； *TuoC5  
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 w?AE8n$8  

高手真多！

楼主威武霸气.