[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： csRba;Z[  
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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： {4}Sl^kn*  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） zLOmtZ(['  
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 LMsbTF@E  
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 Y +HVn0~qz  

以下是几个重要的函数： eC[g"Ef  
1.判断点在区域中函数 CdWGb[uI  
2.计算夹角函数 y"t5%Iv  
3.转置函数 DgClN:Hw  
4.得到区域中心点，及区域半径函数 Q{>9Dg  
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） 2q2wo&uK  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 HK2`.'D  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 8 ehC^Cg  
   cax = x2 - x1 6|_ S|N  
   cay = y2 - y1 TuaT-Z~U{  
   cbx = x2 - x3 Bu6t3  
   cby = y2 - y3 +|#:*GZ  
   mo_jj = cax * cbx + cay * cby !my5-f>{(  
   mo_ca = Sqr(cax * cax + cay * cay) )>TA|W]@  
   mo_cb = Sqr(cbx * cbx + cby * cby) >D-$M_  
   cos_acb = mo_jj / (mo_ca * mo_cb) ~x4Y57  
   'ff_cos = cos_acb *qz]vUb/0  
   If cos_acb >= 1 Then 3P#1fI(c  
   nn = 0 mcr71j  
   ElseIf cos_acb <= -1 Then l#Qf8*0  
   nn = 3.14159265258979 Nk
=M  
   Else I"DV}jg6|  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) b~#rUOXb8?  
   End If V!ajD!00  
   'ff_angle = nn 78 UT]<Q;K  
   ff_angle = nn * 180 / 3.14159265258979 n`^</0  
End Function

'判断点在区域内函数 2t(E+^~  
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 [2&Fnmjk}X  
Dim aob, boc, cod, doa, sum As Single .6/[X`*  
  If ppx = p1x And ppy = p1y Then pl7!O9bo  
     point_in = True 7L]fCw p[  
     Exit Function DtZkrj)D/  
  End If TF{ xFb)  
  If ppx = p2x And ppy = p2y Then d[O.UzQ  
     point_in = True Zu+Z7@$}/  
     Exit Function
Ex<-<tY  
  End If qbT].,?!U  
   If ppx = p3x And ppy = p3y Then "` 9W"A=  
     point_in = True RrRCT.+E  
     Exit Function <X;y 4lPZ  
  End If !hJKI.XH  
     l'o'q7&=z  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) nE/T)[1|  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) g(<@r2p  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 7v=Nh  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) =o5hD,>e  
    sum = aob + boc + cod + doa U` bvv'38#  
    If 360.01 > sum And sum > 359.99 Then 3S <5s}  
       point_in = True 8{h:z 9]J  
    Else LiN{^g^fx  
       point_in = False ^WUF3Q**OU  
    End If Bj\0RmVa1  
End Function

'得到点半径,得到交点坐标函数 }_Jai4O  
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() O":x$>'t  
    '求得中心点坐标 lN^L#m*@  
Dim tt As String W\X51DrEx  
Dim rt(3) As Single 9ft7  
    '判断是否平行 {mI95g&  
   acx = p3x - p1x iD{;!dUZ  
   acy = p3y - p1y UT>\u
 
   bdx = p4x - p2x PUu
cYc  
   bdy = p4y - p2y Ag}>gbz~G  
   If acx * bdy = acy * bdx Then Hk.+1
^?%  
      rt(0) = 0 +[D=2&tmk  
      Exit Function f<y""0L9  
   Else \O\onvEa  
      '判断斜率存在否 whRc YnJ  
      If p1x = p3x And p2x <> p4x Then ("IRv>} 0  
         tt = "ac_n_bd_y" tl0_as  
      ElseIf p1x <> p3x And p2x = p4x Then 6
g7 X1C  
         tt = "ac_y_bd_n" (R Ttz  
      ElseIf p1x <> p3x And p2x <> p4x Then P\w.:.2  
         tt = "ac_y_bd_y" iF<VbQP=X^  
      End If g.&&=T  
    Select Case tt 8thG-  
         Case "ac_n_bd_y" C8aYg  
            'bd线段方程 8m-ryr)  
            k_bd = bdy / bdx R]L7?=  
            b_bd = p2y - k_bd * p2x @hg1&pfxZ<  
            p_x = p1x o6oZk0  
            p_y = k_bd * p_x + b_bd QT?fp >'  
         Case "ac_y_bd_n" 1Te:&d  
            'ac线段方程 MW`q*J`Yo  
            k_ac = acy / acx '7wWdq  
            b_ac = p1y - k_ac * p1x -pcYhLIn  
            p_x = p2x Z7OWpujCvN  
            p_y = k_ac * p_x + b_ac {:'eH  
        Case "ac_y_bd_y" /Nb&e  
           'ac，bd线段都要求 orEwP/L:  
           k_ac = acy / acx 6 {5*9!v63  
           b_ac = p1y - k_ac * p1x UB(Q &U_  
           k_bd = bdy / bdx !`Bb[
BTf  
           b_bd = p2y - k_bd * p2x Fi1gM}>py  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) /__we[$E  
           p_y = k_ac * p_x + b_ac I gA0RY1  
        End Select d;)Im "
 
      rt(1) = p_x [o\O^d  
      rt(2) = p_y ]\*g/QV  
     _s<eqCBV  
'计算最大半径 m {wMzsQ  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) xZbm,.v  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ZZ?=^g  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) %6dFACv  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) Rq9v+Xq2  
Dim bb(5) As Single P\N$TYeH  
  bb(1) = rr1 k}Ahvlq)  
  bb(2) = rr2 H4Pj 3'  
  bb(3) = rr3 F8>Fp"  
  bb(4) = rr4 Nn4<:2  
  nb = rr1 }.MJVB3  
For i = 1 To 4 3*XX@>|o  
    If nb <= bb(i) Then }-YD_Pm K-  
       nb = bb(i) B%cjRwOT  
    End If 4vGkgH<,  
Next i IP/ zFbc  
    rt(0) = Sqr(nb) DX
4uTD  
    rr = rt() |"vqM)V$  
  End If B,,f$h!  
         ep>S$a*|  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  6~ev5SD;f  

X0* y8"  
有热压工艺方面的人才或者资料分享下； O|O#T.Tg  
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 8Tyf#`'I  

高手真多！

楼主威武霸气.