[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： 6@ IXqKz  
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图片:2.jpg

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关键点说几个： fg!__Rdi  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） Ug t.&IA  
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 A8fOQ  
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 so)[59M7  

以下是几个重要的函数：
J^nBdofP  
1.判断点在区域中函数 ^ft>@=K(|  
2.计算夹角函数 U;V7 u/{  
3.转置函数 }QcCS2)Ud  
4.得到区域中心点，及区域半径函数 S)k*?dQ##R  
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） ~xfP:[u  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 }DEg-j,F  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single
ygS;$2m%2  
   cax = x2 - x1 }[};IqVaK  
   cay = y2 - y1 }6}l7x  
   cbx = x2 - x3 #$+*;  
   cby = y2 - y3 gQelD6c
 
   mo_jj = cax * cbx + cay * cby dulI&_x  
   mo_ca = Sqr(cax * cax + cay * cay) A*R^n}sh  
   mo_cb = Sqr(cbx * cbx + cby * cby) e&F8m%t  
   cos_acb = mo_jj / (mo_ca * mo_cb) He/8=$c%  
   'ff_cos = cos_acb >,Ci?[pf  
   If cos_acb >= 1 Then N1S{suic  
   nn = 0 uR4z&y  
   ElseIf cos_acb <= -1 Then ksqQM
 
   nn = 3.14159265258979 C8:f_mJU  
   Else Lpz>>}  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 7Lc]HSZo,  
   End If <X^
@*79m  
   'ff_angle = nn 4qbBc1,7y  
   ff_angle = nn * 180 / 3.14159265258979 4*#18<u5  
End Function

'判断点在区域内函数 @|m/djN5x  
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  c(E{6g?  
Dim aob, boc, cod, doa, sum As Single $q{!5-e  
  If ppx = p1x And ppy = p1y Then JT7nG.9  
     point_in = True =tn)}Y.<e  
     Exit Function syj0.JD  
  End If o5O#vW2Il&  
  If ppx = p2x And ppy = p2y Then \gGW8Q;  
     point_in = True a=1@*ID  
     Exit Function )5JFfp)#  
  End If 2'\H\|  
   If ppx = p3x And ppy = p3y Then 3E]plj7$  
     point_in = True ]t,BMu=%  
     Exit Function -%CP@dAk  
  End If EhvX)s  
     mzKiO_g}  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) b<ZIWfs  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) glxsa8
  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) D& i94\vVa  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 4G0m\[Du  
    sum = aob + boc + cod + doa |4zIfAO  
    If 360.01 > sum And sum > 359.99 Then RnE4<Cy  
       point_in = True F4z{LhZ  
    Else ~?Pw& K2  
       point_in = False RVmh6m  
    End If /NFj(+&g+  
End Function

'得到点半径,得到交点坐标函数 h"Q8b}$^)  
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()  `25yE/  
    '求得中心点坐标 zxl@(hd  
Dim tt As String Y=I'czg  
Dim rt(3) As Single
2\{M:\2o  
    '判断是否平行 uyWunpT  
   acx = p3x - p1x mdDOvm:&  
   acy = p3y - p1y _8J.fT$${  
   bdx = p4x - p2x >\#*P'y`d  
   bdy = p4y - p2y "m8^zg hL  
   If acx * bdy = acy * bdx Then CwzZ8.o$i  
      rt(0) = 0 :\c ^*K(9  
      Exit Function ]:-mbgW  
   Else o#Dk& cH  
      '判断斜率存在否 6;d*r$0Fc  
      If p1x = p3x And p2x <> p4x Then FVbb2Y?R  
         tt = "ac_n_bd_y" u4?L 67x  
      ElseIf p1x <> p3x And p2x = p4x Then _6hQ %hv8  
         tt = "ac_y_bd_n" #p&qUw  
      ElseIf p1x <> p3x And p2x <> p4x Then BwpqNQN  
         tt = "ac_y_bd_y" NwvC[4  
      End If  4e7-0}0  
    Select Case tt -@2iaQ(5a2  
         Case "ac_n_bd_y" |SSSH  
            'bd线段方程 d&Zpkbh"  
            k_bd = bdy / bdx lfgq=8d  
            b_bd = p2y - k_bd * p2x rXP,\ ]r+  
            p_x = p1x L`TLgH&?R  
            p_y = k_bd * p_x + b_bd 8/#A!Ww]  
         Case "ac_y_bd_n" *:7rdzn  
            'ac线段方程
Mfuv0P~  
            k_ac = acy / acx
pah'>dAL  
            b_ac = p1y - k_ac * p1x {}n^cq  
            p_x = p2x `
/+>a8  
            p_y = k_ac * p_x + b_ac v;{#Q&(  
        Case "ac_y_bd_y" [|$h*YK  
           'ac，bd线段都要求 ]s'as9s9  
           k_ac = acy / acx u&vf+6=9Dd  
           b_ac = p1y - k_ac * p1x ,[KD,)3y  
           k_bd = bdy / bdx 9W5lSX#^;  
           b_bd = p2y - k_bd * p2x 0Mm)`!TLSW  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) K5h  
           p_y = k_ac * p_x + b_ac BDDlQci38  
        End Select sll\g  
      rt(1) = p_x h;"4+uw  
      rt(2) = p_y Sz`,X0a  
     2]*OQb#O6e  
'计算最大半径 !;A\.~-!G  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) M7~2iU<#  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 6d}lw6L  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) @Nx9)  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) C}Cs8eUn  
Dim bb(5) As Single  mq.`X:e  
  bb(1) = rr1 T!#GW/?  
  bb(2) = rr2 CAhXQ7w'Z  
  bb(3) = rr3 +O{*M9B  
  bb(4) = rr4 2/^3WY1U  
  nb = rr1 ~<bZ1TD   
For i = 1 To 4 #c!lS<z  
    If nb <= bb(i) Then 
U8?mc  
       nb = bb(i) g3y~bf  
    End If CHX#^0m.  
Next i /([kh~a  
    rt(0) = Sqr(nb) KZE,bi:~  
    rr = rt() J ZS:MFA  
  End If \R_
C&=  
         x 9fip-  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  t]G:L}AOl  

@H8EWTZ  
有热压工艺方面的人才或者资料分享下； dWBA1p  
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 ns4,@C$  

高手真多！

楼主威武霸气.