[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： &VcO,7 A|  
c=
?Tu  

描述:请输入描述

图片:2.jpg

r%NzKPW'  

关键点说几个： r;E5e]w*-  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） Om_ "X6  
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 ^(@]5
$^Z  
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 {xOzxLB;  

以下是几个重要的函数： '@IReMl  
1.判断点在区域中函数 GiXs`Yt|  
2.计算夹角函数 ;7QG]JX  
3.转置函数 &PFq(4  
4.得到区域中心点，及区域半径函数 TI0=nfj  
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） {xTh!ih2-  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 W@zu
N)U  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single i [Wxu M  
   cax = x2 - x1 fN:FD`  
   cay = y2 - y1 {<#b@=G  
   cbx = x2 - x3 +8"P*z,  
   cby = y2 - y3 -.L )\  
   mo_jj = cax * cbx + cay * cby <AP.m4N) _  
   mo_ca = Sqr(cax * cax + cay * cay) 2^nws  
   mo_cb = Sqr(cbx * cbx + cby * cby) N^k& 8  
   cos_acb = mo_jj / (mo_ca * mo_cb) ikb77?.  
   'ff_cos = cos_acb XN{zl*`  
   If cos_acb >= 1 Then .CNwuN\  
   nn = 0 Y##lFEt  
   ElseIf cos_acb <= -1 Then Uv~|Xj4.  
   nn = 3.14159265258979 7(P4KvkI  
   Else YN7`18u  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ZCM
H?>  
   End If .YP&E1lNi  
   'ff_angle = nn 'Asr,[]?  
   ff_angle = nn * 180 / 3.14159265258979 I7#JT?\}  
End Function

'判断点在区域内函数 %az6\"n  
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 4I|pkdF_  
Dim aob, boc, cod, doa, sum As Single 4gUx#_AaG  
  If ppx = p1x And ppy = p1y Then u0g"x_3  
     point_in = True j |o&T41  
     Exit Function y9=<q%Kc-  
  End If " SP6o  
  If ppx = p2x And ppy = p2y Then b)E<b{'W  
     point_in = True ,|,kU0xXz  
     Exit Function 6':Egh[;  
  End If 2v#gCou  
   If ppx = p3x And ppy = p3y Then wjgFe]  
     point_in = True y0/FyQs  
     Exit Function H0.A;`  
  End If 5r~hs6H  
     #EB Rc4>,  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) iun_z$I<+Z  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) W"CG&.  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) iM6(bmc.  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) .~q>e*8AH  
    sum = aob + boc + cod + doa ZvO1=* J,  
    If 360.01 > sum And sum > 359.99 Then ]<r.{EJ  
       point_in = True -w5sXnS  
    Else !@y/{~Gu  
       point_in = False 6:`[Fi  
    End If Gi2Fjq/Y  
End Function

'得到点半径,得到交点坐标函数 P97i<pB Y_  
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() q9a6s{,  
    '求得中心点坐标 v$5D&Tv  
Dim tt As String jc#gn&4C  
Dim rt(3) As Single =En1?3?  
    '判断是否平行 Ae"|a_>fMI  
   acx = p3x - p1x 3a=\$x@  
   acy = p3y - p1y #YK3Ogb,  
   bdx = p4x - p2x mQ:YHtHE.F  
   bdy = p4y - p2y t=s.w(3t  
   If acx * bdy = acy * bdx Then |+>U91!  
      rt(0) = 0 s'IB{lJ9  
      Exit Function /g!Xe]Ss  
   Else R|wS*xd,  
      '判断斜率存在否 l0g+OMt  
      If p1x = p3x And p2x <> p4x Then t -fmA?\  
         tt = "ac_n_bd_y" YNKvR  
      ElseIf p1x <> p3x And p2x = p4x Then ap
"pQ[t;  
         tt = "ac_y_bd_n" 4%JJ}{Ff  
      ElseIf p1x <> p3x And p2x <> p4x Then v#:?:<  
         tt = "ac_y_bd_y" }Gx@1)??  
      End If E]r<t#  
    Select Case tt c>+68<H  
         Case "ac_n_bd_y" J6rWe  
            'bd线段方程 U9awN&1([  
            k_bd = bdy / bdx 'R42N3|F  
            b_bd = p2y - k_bd * p2x HYY+Fv5  
            p_x = p1x q]SH
'Wd  
            p_y = k_bd * p_x + b_bd i<=2 L?[.I  
         Case "ac_y_bd_n" :()K2<E  
            'ac线段方程 LZE9]Gd  
            k_ac = acy / acx I#7H)^us  
            b_ac = p1y - k_ac * p1x 0(&Rm
R  
            p_x = p2x s%6L94\t  
            p_y = k_ac * p_x + b_ac 2t>>08T  
        Case "ac_y_bd_y" 78?cCj{e  
           'ac，bd线段都要求 -mLu!32I<  
           k_ac = acy / acx @3FQMs4  
           b_ac = p1y - k_ac * p1x ?wn<F}UH  
           k_bd = bdy / bdx lZ <D,&  
           b_bd = p2y - k_bd * p2x MfKru,LSh  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) %e|UA-(  
           p_y = k_ac * p_x + b_ac %*IH~/Ld;]  
        End Select QA)W(1  
      rt(1) = p_x `Ao"fRv#  
      rt(2) = p_y ZU2D.Kf_:  
     X\*H7;k,  
'计算最大半径 ?MFXZ/3(ba  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) Z^mQb2e.  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) U#XW}T=|  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) u bZ`Y$  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ZZfi,0R  
Dim bb(5) As Single T]b&[?p|a[  
  bb(1) = rr1 mGoC8t}iP  
  bb(2) = rr2 3x z z* <  
  bb(3) = rr3 Uv=)y^H~*A  
  bb(4) = rr4 ![MtJo5  
  nb = rr1 (Fq]y5  
For i = 1 To 4 `R lWhdE  
    If nb <= bb(i) Then w7vQ6j
kH  
       nb = bb(i) .f!:@fX>=  
    End If ]@ Vp:RGMr  
Next i &?}h)
U#:  
    rt(0) = Sqr(nb) ]5M
T-qU  
    rr = rt() + EKp*Vje  
  End If vVsaGW   
         Lw?>1rTT/  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  UK[+I]I p  

z qd1G(tO  
有热压工艺方面的人才或者资料分享下； QxBH{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 ~AF' 6"A  

高手真多！

楼主威武霸气.