[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： z6 a,0&;-L  
;/R kMS  
\#2 s4RCji  

关键点说几个： 7MoR9,(  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 8-A:k E  
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 9QC< 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 lS#7xh  

以下是几个重要的函数： b$dBV}0 L  
1.判断点在区域中函数 .l7j8}  
2.计算夹角函数 q)vK`\Y  
3.转置函数 xna7kA  
4.得到区域中心点，及区域半径函数 A
jG)1  
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） 5[nmP95YK  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 *+NGi(N  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 3T"2S[gT  
   cax = x2 - x1 J0&zb'1  
   cay = y2 - y1 3(MoXA*  
   cbx = x2 - x3 j'\>Nn+  
   cby = y2 - y3 4tbw*H5!5  
   mo_jj = cax * cbx + cay * cby ;9}w|!/  
   mo_ca = Sqr(cax * cax + cay * cay) ]U_5\$  
   mo_cb = Sqr(cbx * cbx + cby * cby) T:be 9 5!,  
   cos_acb = mo_jj / (mo_ca * mo_cb) |!{z? i  
   'ff_cos = cos_acb TihnSb  
   If cos_acb >= 1 Then 4s[`yV  
   nn = 0 B.V?s,U  
   ElseIf cos_acb <= -1 Then tX@0:RX%  
   nn = 3.14159265258979 Cq-hPa}2  
   Else H~~7~1"x  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) I).=v{@9V<  
   End If J>&[J!>r  
   'ff_angle = nn E7V38Z  
   ff_angle = nn * 180 / 3.14159265258979 k}- "0>  
End Function

'判断点在区域内函数 O]c=Yyl  
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 `Af{H/qiI  
Dim aob, boc, cod, doa, sum As Single qXXYF>Z-  
  If ppx = p1x And ppy = p1y Then D-'i G%)kA  
     point_in = True N7d17c. 5  
     Exit Function s@[C&v  
  End If m\<<oI
lH  
  If ppx = p2x And ppy = p2y Then *rS9eej  
     point_in = True 8:Z@lp^  
     Exit Function ck(CA(_  
  End If ;n%]*v  
   If ppx = p3x And ppy = p3y Then qzuQq94k  
     point_in = True *54>iO- c  
     Exit Function F% F c+?  
  End If 3$GY,B  
     *LY~l  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) aO~si=  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 8 m%>:}o  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 43vGgGW  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) Xjs21-t%  
    sum = aob + boc + cod + doa 3!i.Fmo  
    If 360.01 > sum And sum > 359.99 Then 0!9?H1>  
       point_in = True #pS]k<o%1  
    Else TYs+XJ'Xj  
       point_in = False Q%M'[L?[  
    End If P5'iYahCq_  
End Function

'得到点半径,得到交点坐标函数 r1[E{Tpz  
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() .Q=2WCv0  
    '求得中心点坐标 3a'Rs{qxn  
Dim tt As String Sqp;/&Ji  
Dim rt(3) As Single )GiFkG  
    '判断是否平行 eT7!a']x  
   acx = p3x - p1x fe& t-  
   acy = p3y - p1y %8}WX@SB  
   bdx = p4x - p2x _&k'j)rg  
   bdy = p4y - p2y `jD8(}_  
   If acx * bdy = acy * bdx Then @A~B ,  
      rt(0) = 0 )LXoey!aZ  
      Exit Function ^l]]qdNr  
   Else N<#S3B?.  
      '判断斜率存在否 =yk Rki  
      If p1x = p3x And p2x <> p4x Then QLn5#x~xb  
         tt = "ac_n_bd_y" Jcwh|w9D8  
      ElseIf p1x <> p3x And p2x = p4x Then !$:0E y(S  
         tt = "ac_y_bd_n" q7 %=`l  
      ElseIf p1x <> p3x And p2x <> p4x Then N.fQ7z=Z(M  
         tt = "ac_y_bd_y" Yv#J`b@y  
      End If RZ#alFL,  
    Select Case tt 2ru*#Z#(  
         Case "ac_n_bd_y" B-y0;0  
            'bd线段方程 ;,F-6RNj  
            k_bd = bdy / bdx aJuj7y-  
            b_bd = p2y - k_bd * p2x N>&{Wl'y\  
            p_x = p1x VYl_U?D
 
            p_y = k_bd * p_x + b_bd ,\sR;=svK  
         Case "ac_y_bd_n" Bo](n*i  
            'ac线段方程 ifJv~asp   
            k_ac = acy / acx :wv :#EaH  
            b_ac = p1y - k_ac * p1x >5Q^9 9V  
            p_x = p2x nvO%  
            p_y = k_ac * p_x + b_ac ! /|0:QQi  
        Case "ac_y_bd_y" nhVK?  
           'ac，bd线段都要求 LW83
Y/7  
           k_ac = acy / acx m6~ sKJV  
           b_ac = p1y - k_ac * p1x Z`-)1!  
           k_bd = bdy / bdx ?J^IAFy  
           b_bd = p2y - k_bd * p2x O+(. 29  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) x[GFX8h(k6  
           p_y = k_ac * p_x + b_ac Y0P}KPD  
        End Select dK0}% ]i3#  
      rt(1) = p_x zumR(<l  
      rt(2) = p_y [3{:H"t  
     k=h/i8i2z  
'计算最大半径 7`uA  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 2-"Lxe65f  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) #K<=xP  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 8 7|8eU2:k  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) z{D$~ ob  
Dim bb(5) As Single Q8}TNJsU  
  bb(1) = rr1 SxLHFN]  
  bb(2) = rr2 M\Uc;:) H  
  bb(3) = rr3 }2iKi(io*  
  bb(4) = rr4 >0g`U  
  nb = rr1 PK.h E{R  
For i = 1 To 4 YobC'c\~9  
    If nb <= bb(i) Then 4t+/
 
       nb = bb(i) 8r`VbgI&  
    End If *hk{q/*Qw  
Next i #wh
O2Mv  
    rt(0) = Sqr(nb) &P,4EaC9;  
    rr = rt() vjs|!O=oH  
  End If np'M4^E;  
         T;:',T[G  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  k`4\.m"&  

KbuGf$Bv  
有热压工艺方面的人才或者资料分享下； h>5~ (n8  
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 f@.Q%+!4  

高手真多！

楼主威武霸气.