[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： moQ><>/  
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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： nZF(92
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1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） MCamc  
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 c#qOK  
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 stnyJ9  

以下是几个重要的函数： "7R"(.~>  
1.判断点在区域中函数 RU!j"T 5  
2.计算夹角函数 eSZS`(#!(  
3.转置函数 R5LzqT,/N:  
4.得到区域中心点，及区域半径函数 e&dE>m  
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） fH.:#O:  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 LOyL:~$  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single uX{n#i,~L  
   cax = x2 - x1 ;dl>  
   cay = y2 - y1 sDnHd9v<?t  
   cbx = x2 - x3 mj0{Nd  
   cby = y2 - y3 v*%#Fp,g8  
   mo_jj = cax * cbx + cay * cby %dTkw+J  
   mo_ca = Sqr(cax * cax + cay * cay) ~je#gVoUR  
   mo_cb = Sqr(cbx * cbx + cby * cby) %iWup
:  
   cos_acb = mo_jj / (mo_ca * mo_cb) aH)$#6${Ap  
   'ff_cos = cos_acb -f0Nb+AR  
   If cos_acb >= 1 Then !|`G<WD  
   nn = 0 [B9'/:  
   ElseIf cos_acb <= -1 Then 4l2i'H  
   nn = 3.14159265258979 ;aBK4<-vl  
   Else ko2Kz k  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) E 3b`GRay  
   End If 4C^;lK  
   'ff_angle = nn u
-Pa:wm0-  
   ff_angle = nn * 180 / 3.14159265258979 >{i/LC^S  
End Function

'判断点在区域内函数 i"%X[(U7  
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 fk)ts,p?  
Dim aob, boc, cod, doa, sum As Single Pg" uisT#>  
  If ppx = p1x And ppy = p1y Then W R@=[G#TJ  
     point_in = True t4pc2b  
     Exit Function N2uxiXpQZ=  
  End If N+x0"~T}I  
  If ppx = p2x And ppy = p2y Then kf+]bV  
     point_in = True Pl<r*d)h  
     Exit Function }^WQNdws56  
  End If G?!b00H  
   If ppx = p3x And ppy = p3y Then naCPSsei  
     point_in = True ^'i(@{{o\  
     Exit Function IbC(/i#%`  
  End If Ed,`1+
 
     :G9+-z{Y&  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) SCE5|3j  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) \|nF55W [  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) f>ohu^bd  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ARAC'F0  
    sum = aob + boc + cod + doa o^;$-O!/  
    If 360.01 > sum And sum > 359.99 Then g1VdP[Y#  
       point_in = True +[*VU2f t  
    Else yC !`6$  
       point_in = False 1VK?Svnd  
    End If :#58m0YLA:  
End Function

'得到点半径,得到交点坐标函数 km2('t7?  
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() 8A}w}h  
    '求得中心点坐标 /%9D$\  
Dim tt As String >_P7k5Y^  
Dim rt(3) As Single 0xrr9X<  
    '判断是否平行 zbK=yOIOd  
   acx = p3x - p1x lP& 7
U  
   acy = p3y - p1y ,/AwR?m  
   bdx = p4x - p2x \Km!#:  
   bdy = p4y - p2y GZ0? C2\  
   If acx * bdy = acy * bdx Then w naP?|/  
      rt(0) = 0 tFt56/4  
      Exit Function 1S9(Zn[2,  
   Else t-Rfy`I3  
      '判断斜率存在否 ^;jJVYx-PP  
      If p1x = p3x And p2x <> p4x Then B*7Y5_N  
         tt = "ac_n_bd_y" <<`*o[^L  
      ElseIf p1x <> p3x And p2x = p4x Then eznt "Rr2  
         tt = "ac_y_bd_n" &v|Uy}h&%1  
      ElseIf p1x <> p3x And p2x <> p4x Then E^w2IIw  
         tt = "ac_y_bd_y" Q\Dx/?g!vx  
      End If .?R~!K{`  
    Select Case tt r_nB-\  
         Case "ac_n_bd_y" YXI_ '  
            'bd线段方程 ,?k[<C  
            k_bd = bdy / bdx D ]Q,~Y&'  
            b_bd = p2y - k_bd * p2x VZo[\sWf  
            p_x = p1x \MBbZB9@  
            p_y = k_bd * p_x + b_bd *I
6z;.#  
         Case "ac_y_bd_n" eygmhaE  
            'ac线段方程 r/zuo6"5  
            k_ac = acy / acx rx2?y3pv  
            b_ac = p1y - k_ac * p1x |f), dC  
            p_x = p2x 85CH% I#  
            p_y = k_ac * p_x + b_ac !z">aIj\6  
        Case "ac_y_bd_y" k7JE{(Ok  
           'ac，bd线段都要求 +v.uP[H  
           k_ac = acy / acx |/<,71Ae  
           b_ac = p1y - k_ac * p1x 0/K?'&$yvb  
           k_bd = bdy / bdx {$D[l hj  
           b_bd = p2y - k_bd * p2x 'i5 VU4?K  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 0WT]fY?IS  
           p_y = k_ac * p_x + b_ac j6v|D>I  
        End Select 8*7t1$  
      rt(1) = p_x G165grGFd  
      rt(2) = p_y J1OZG6|e  
     m,}0p  
'计算最大半径 ]v^/c~"${  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) m>yb}+  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) <T]%Gg8  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) Uytq,3Gj
6  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) _M'WTe  
Dim bb(5) As Single k(LZ,WSR  
  bb(1) = rr1 Gl8D GELl;  
  bb(2) = rr2 4=/5  
  bb(3) = rr3 <xM$^r)  
  bb(4) = rr4 tLCu7%P>  
  nb = rr1 j>jZg<}J  
For i = 1 To 4 U\aP  
    If nb <= bb(i) Then .Zo%6[X  
       nb = bb(i) j"(o>bv7  
    End If ;W%nB
dE6|  
Next i ,b[}22  
    rt(0) = Sqr(nb) /`(Kbwh  
    rr = rt() :5)Dn87  
  End If k=;>*:D%  
         >,c$e' h  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  "h@|XI  

]lBe   
有热压工艺方面的人才或者资料分享下； 'eM90I%(  
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 [_$r-FA  

高手真多！

楼主威武霸气.