[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： &|,qsDK(  
!t [%'!v  
>ww1
:Sn  

关键点说几个： G6g=F+X2  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 6xQe!d3>s3  
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 XzwQ,+IAr  
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 HK4`@jYQ  

以下是几个重要的函数： ])";Z  
1.判断点在区域中函数 ~2qG"1[\  
2.计算夹角函数 &:{yf=  
3.转置函数 ,,-3p#Pbw  
4.得到区域中心点，及区域半径函数 zU=[Kc=$  
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） tTxo:+xg  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 q\=[
v  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single `SbX`a0p2  
   cax = x2 - x1 *qOCo_=P8  
   cay = y2 - y1 n8ya$bc  
   cbx = x2 - x3 yc}t(*A5  
   cby = y2 - y3 h^X.e[  
   mo_jj = cax * cbx + cay * cby jpS#'h  
   mo_ca = Sqr(cax * cax + cay * cay) N8Q{4c  
   mo_cb = Sqr(cbx * cbx + cby * cby) /1GZN *I  
   cos_acb = mo_jj / (mo_ca * mo_cb) C#c
EMKa  
   'ff_cos = cos_acb M|u5Vs1  
   If cos_acb >= 1 Then cHd39H9  
   nn = 0 !(tJZ5  
   ElseIf cos_acb <= -1 Then $e\R5Lu  
   nn = 3.14159265258979 9~af\G  
   Else Za?&\  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) aB_z4dqwU  
   End If f%l#g]]  
   'ff_angle = nn jC7XdYp  
   ff_angle = nn * 180 / 3.14159265258979 XV!EjD~q  
End Function

'判断点在区域内函数 ] lTfi0}g_  
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 4\RuJx  
Dim aob, boc, cod, doa, sum As Single J'v|^`bE  
  If ppx = p1x And ppy = p1y Then 14zzWzKx  
     point_in = True HN)QS5  
     Exit Function osI(g'Xb  
  End If ,iy   
  If ppx = p2x And ppy = p2y Then zD|W3hL2&  
     point_in = True |-<L :%  
     Exit Function jz0\F,s  
  End If 3~'F^=T.Y  
   If ppx = p3x And ppy = p3y Then ?a(3~dh|  
     point_in = True .? /J  
     Exit Function p^!p7B`qe.  
  End If :r=_\?  
     0:p#%Nvg  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) nrS_t y  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) a#=-Aj-  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) Uk4">]oct  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ozG:f*{T  
    sum = aob + boc + cod + doa tp
&iOP6O  
    If 360.01 > sum And sum > 359.99 Then ,)G,[ih  
       point_in = True `$HO`d@0*R  
    Else rG6/h'!|  
       point_in = False p IToy;]  
    End If \h4y,sl  
End Function

'得到点半径,得到交点坐标函数 u1l#k60  
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() TrW3@@}j  
    '求得中心点坐标 xh$[E&2u  
Dim tt As String @Ia ~9yOY  
Dim rt(3) As Single th{h)( +H  
    '判断是否平行 t~Ax#H  
   acx = p3x - p1x dmne+ufB  
   acy = p3y - p1y YQOGxSi  
   bdx = p4x - p2x VTU-'q  
   bdy = p4y - p2y Wu(GC]lTG  
   If acx * bdy = acy * bdx Then vbp)/I-h  
      rt(0) = 0 AyDK-8a  
      Exit Function #XZ?,neY  
   Else U<x3=P  
      '判断斜率存在否 Y9N:%[ :>W  
      If p1x = p3x And p2x <> p4x Then "d'@IN  
         tt = "ac_n_bd_y" pFh2@O  
      ElseIf p1x <> p3x And p2x = p4x Then I5mS!m/X  
         tt = "ac_y_bd_n" =z+zg^wsT  
      ElseIf p1x <> p3x And p2x <> p4x Then X%sc:V  
         tt = "ac_y_bd_y" ?(z3/"g]  
      End If N*#SY$!y  
    Select Case tt i \~4W$4
I  
         Case "ac_n_bd_y" 827N?pU$)  
            'bd线段方程 :BS`Q/<w  
            k_bd = bdy / bdx : SNp"|  
            b_bd = p2y - k_bd * p2x z3,z&Ra  
            p_x = p1x JG `QJ%  
            p_y = k_bd * p_x + b_bd R=l/EK  
         Case "ac_y_bd_n" c72/e7gV  
            'ac线段方程 SFHa(JOS  
            k_ac = acy / acx btOC\bUMfD  
            b_ac = p1y - k_ac * p1x ?^5x d1>E  
            p_x = p2x GZ"O%:d  
            p_y = k_ac * p_x + b_ac t0Uax-E(  
        Case "ac_y_bd_y" ty ~U~  
           'ac，bd线段都要求 <M=K!k  
           k_ac = acy / acx {,m!%FDL  
           b_ac = p1y - k_ac * p1x _<8n]0lX3  
           k_bd = bdy / bdx PQ j_j#0  
           b_bd = p2y - k_bd * p2x E?V:dr  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) rfk';ph  
           p_y = k_ac * p_x + b_ac Lt)t}0  
        End Select Z1&8U=pax  
      rt(1) = p_x ^U52 *6  
      rt(2) = p_y nxG vh4'i8  
     g)zy^aDf  
'计算最大半径 q8U]Hyp(`  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) z;-2xD0&U[  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) B,676~I  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) n`6vM4rM)  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) z~F!zigNAc  
Dim bb(5) As Single &{>~|^  
  bb(1) = rr1 ?D#Vha  
  bb(2) = rr2 _z_uz\#,  
  bb(3) = rr3 oD.f/hi0|  
  bb(4) = rr4 2`; 0y M  
  nb = rr1 pl%ag~i5  
For i = 1 To 4 B;EdLs}  
    If nb <= bb(i) Then ,E_hG3}}  
       nb = bb(i) nD!^0?  
    End If QDU^yVa_  
Next i rHMsA|xz6  
    rt(0) = Sqr(nb) BQm H9g|2  
    rr = rt() *w!H -*`  
  End If A2xORG&FD  
         "`lRX  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ^BW V6  

@r'8<6hVO  
有热压工艺方面的人才或者资料分享下； >AV?g8B;  
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 LKtr>u  

高手真多！

楼主威武霸气.