[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： 4zyy  
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关键点说几个： YKbR#DC\  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） "T4Z#t  
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 kJP fL s  
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 '\ec ,&4Z  

以下是几个重要的函数： V[>MKB(  
1.判断点在区域中函数 8/Z  
2.计算夹角函数 2T!pFcc  
3.转置函数  WTi8  
4.得到区域中心点，及区域半径函数 m_~!Lj[u.  
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） Y4,~s64e  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 qn}w]yGW  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single b`N0lH.V  
   cax = x2 - x1 L2Ynv4llm  
   cay = y2 - y1 der'<Q.U:k  
   cbx = x2 - x3 "\bbe@  
   cby = y2 - y3 bY:A7.p7#  
   mo_jj = cax * cbx + cay * cby ]c,ttS_  
   mo_ca = Sqr(cax * cax + cay * cay) L 1=HD  
   mo_cb = Sqr(cbx * cbx + cby * cby) CqQ>"Y  
   cos_acb = mo_jj / (mo_ca * mo_cb) .XR`iXY  
   'ff_cos = cos_acb ej
dYh $  
   If cos_acb >= 1 Then D{YAEG   
   nn = 0 1euL+zeh  
   ElseIf cos_acb <= -1 Then Eh\0gQ=  
   nn = 3.14159265258979 T-pes1Wu  
   Else )`?Es8uW  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) KWIH5* AM  
   End If U%3d_"{;  
   'ff_angle = nn P]A>"-k  
   ff_angle = nn * 180 / 3.14159265258979 86!"b  
End Function

'判断点在区域内函数 ?r"][<  
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 X6s6fu;  
Dim aob, boc, cod, doa, sum As Single 'j>+eA>  
  If ppx = p1x And ppy = p1y Then u*u>F@C8  
     point_in = True `WvNN>R  
     Exit Function 4/; X-  
  End If DIO @Zo  
  If ppx = p2x And ppy = p2y Then e6n1/TtqM  
     point_in = True 2*:lFvwP  
     Exit Function ncS.~F
 
  End If tX)l$oRPr  
   If ppx = p3x And ppy = p3y Then JEq0{_7  
     point_in = True nHxos`Qx  
     Exit Function gIv :<EJ9  
  End If Gxk=]5<7  
     EacqQFErl  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) [wB-e~  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) k{>rI2;  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) -'&4No  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ;!U`GN,tH  
    sum = aob + boc + cod + doa '~i;g.n=}-  
    If 360.01 > sum And sum > 359.99 Then 5HP6o  
       point_in = True &Npv~Iy  
    Else hYRGIpu5  
       point_in = False -N`j` zb|  
    End If f&=y\uP]  
End Function

'得到点半径,得到交点坐标函数  `=b)fE  
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() PZ2$ [s0W  
    '求得中心点坐标 <]I[|4J 7  
Dim tt As String +k]9n*^uz  
Dim rt(3) As Single F*QZVg+<*X  
    '判断是否平行 <-uE pF  
   acx = p3x - p1x q)R&npP7  
   acy = p3y - p1y lV!ecJw$  
   bdx = p4x - p2x b}'XDw   
   bdy = p4y - p2y #UGtYD}"  
   If acx * bdy = acy * bdx Then .zr2!}lB  
      rt(0) = 0 *k'D%}N:  
      Exit Function J
\U}U'qP  
   Else krwY_$q  
      '判断斜率存在否 c]jK Y<  
      If p1x = p3x And p2x <> p4x Then n,sl|hv2U  
         tt = "ac_n_bd_y" yv||:wZC  
      ElseIf p1x <> p3x And p2x = p4x Then h,B ]5Of  
         tt = "ac_y_bd_n" Z\8TpwD2  
      ElseIf p1x <> p3x And p2x <> p4x Then J1DX}h]  
         tt = "ac_y_bd_y" + 5E6|  
      End If !J ")TP=  
    Select Case tt \YO1;\W  
         Case "ac_n_bd_y" ,^,
KWi9  
            'bd线段方程 lC&U9=
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            k_bd = bdy / bdx %!$ua_8  
            b_bd = p2y - k_bd * p2x TNBFb_F  
            p_x = p1x 6LZ(bP'd;  
            p_y = k_bd * p_x + b_bd 'J~{8w,.  
         Case "ac_y_bd_n" INrl^P*  
            'ac线段方程 $ hwJjSZ0  
            k_ac = acy / acx QCkPua9  
            b_ac = p1y - k_ac * p1x l1}=>V1  
            p_x = p2x v>zeK  
            p_y = k_ac * p_x + b_ac OI;0dS  
        Case "ac_y_bd_y" "R@N}q<*v2  
           'ac，bd线段都要求 &L}e&5  
           k_ac = acy / acx dUn+?  
           b_ac = p1y - k_ac * p1x TS+itU62  
           k_bd = bdy / bdx 2= FGZa*.  
           b_bd = p2y - k_bd * p2x L?!*HS7m  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) mmP>Ji  
           p_y = k_ac * p_x + b_ac K~gt=NH  
        End Select vfAR^*7e  
      rt(1) = p_x [ L% -lJ  
      rt(2) = p_y {8D`A;KD  
     >?s[g)np  
'计算最大半径 `.Z MwA  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) x5\C MWW  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) --E_s/  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) GkqKIs  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) x zmg'Br  
Dim bb(5) As Single yVd}1bX  
  bb(1) = rr1 Wr"
-~PP  
  bb(2) = rr2 A&_H%]{<:  
  bb(3) = rr3 Dd8*1,  
  bb(4) = rr4 b:Oa4vBa  
  nb = rr1 wi/Fx=w  
For i = 1 To 4 W/COrgbW  
    If nb <= bb(i) Then :'RmT
3  
       nb = bb(i) <A?- *
 
    End If Ft)7Wx" S  
Next i B|E4(,]^  
    rt(0) = Sqr(nb) c?oNKqPzg  
    rr = rt() #7/;d=  
  End If C5mq@$6  
         jyRSe^x  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  p5RnFe
l  

z$#q'+$  
有热压工艺方面的人才或者资料分享下； er<yB#/;-  
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 S$O+p&!X  

高手真多！

楼主威武霸气.