[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： OA+W$
  
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关键点说几个： fNQecDuS  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） Zvc{o8^z  
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 rKO[;]_*  
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 V4|p
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以下是几个重要的函数： =V(I  
1.判断点在区域中函数 vFQ'sd]C  
2.计算夹角函数 Y}PI{PN  
3.转置函数 9mr99tA  
4.得到区域中心点，及区域半径函数 -e30!A  
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） jfk`%CEk=  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 p"w"/[8  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single =}F &jl  
   cax = x2 - x1 4;x{@Ln  
   cay = y2 - y1 SO9j/  
   cbx = x2 - x3 "d9"Md0k  
   cby = y2 - y3 ml\A)8O]j/  
   mo_jj = cax * cbx + cay * cby Y`w+?}(M  
   mo_ca = Sqr(cax * cax + cay * cay) y^?7de}  
   mo_cb = Sqr(cbx * cbx + cby * cby) >HXT:0  
   cos_acb = mo_jj / (mo_ca * mo_cb) V|)3l7IC<  
   'ff_cos = cos_acb l@%MS\{  
   If cos_acb >= 1 Then $)mK]57  
   nn = 0 #2s$dI  
   ElseIf cos_acb <= -1 Then 7?xTJN)G  
   nn = 3.14159265258979 ;~3CuN8  
   Else xM'bb5  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) vdV@G`)HPr  
   End If #3leMZ6  
   'ff_angle = nn QOB>
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   ff_angle = nn * 180 / 3.14159265258979 1ve %xF  
End Function

'判断点在区域内函数 nep0<&"  
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 Yi1lvB?m  
Dim aob, boc, cod, doa, sum As Single Gm~jC <  
  If ppx = p1x And ppy = p1y Then tNj-~r  
     point_in = True `fY
ICp  
     Exit Function .SzPig  
  End If ~PAF2  
  If ppx = p2x And ppy = p2y Then (e.?). e  
     point_in = True c6VfFt6p  
     Exit Function LlKvi_z  
  End If _~]~ssn,1  
   If ppx = p3x And ppy = p3y Then ?NkweT(  
     point_in = True e=e^;K4  
     Exit Function /%fBkA#n  
  End If Jr+~'  
     Myaj81  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) dY[ XNP  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 2O;Lw@W  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) (xxNQ] l-(  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) RvrZtg5  
    sum = aob + boc + cod + doa u_ou,RF  
    If 360.01 > sum And sum > 359.99 Then O<}3\O )G(  
       point_in = True 5G  @  
    Else ~QzUQYG*  
       point_in = False t+y$i@R:  
    End If 4j+FDc`  
End Function

'得到点半径,得到交点坐标函数 v|~&I%S7  
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() w(/#isC  
    '求得中心点坐标 DNTkv_S  
Dim tt As String n@1;5)&k~  
Dim rt(3) As Single d6RO2^  
    '判断是否平行 QEtf-xNn^  
   acx = p3x - p1x -o: ifF|  
   acy = p3y - p1y tFj[>_d7  
   bdx = p4x - p2x Hg[g{A_G[  
   bdy = p4y - p2y R;y
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   If acx * bdy = acy * bdx Then %PF:OB6[|  
      rt(0) = 0 ''.P=  
      Exit Function (_2Iu%F  
   Else M( euwy  
      '判断斜率存在否 H|UGR~&  
      If p1x = p3x And p2x <> p4x Then AlPk o($E*  
         tt = "ac_n_bd_y" Dq
xtc|vo  
      ElseIf p1x <> p3x And p2x = p4x Then I7=g8/JD  
         tt = "ac_y_bd_n" q!fdiv`  
      ElseIf p1x <> p3x And p2x <> p4x Then SK][UxoHm  
         tt = "ac_y_bd_y" ko7*9`  
      End If FR57F(31  
    Select Case tt mHj3ItXUu  
         Case "ac_n_bd_y" y"bSn5B[  
            'bd线段方程 +O]jklS4H  
            k_bd = bdy / bdx xJcM1>cT>  
            b_bd = p2y - k_bd * p2x ` @PHV  
            p_x = p1x 1&7~.S;km  
            p_y = k_bd * p_x + b_bd
&PE/\_xD_  
         Case "ac_y_bd_n" Uj/m  
            'ac线段方程 fCMFPhF  
            k_ac = acy / acx Ire+r "am  
            b_ac = p1y - k_ac * p1x GF^)](xY+  
            p_x = p2x M'(4{4rC  
            p_y = k_ac * p_x + b_ac cu|S|]g  
        Case "ac_y_bd_y" !k5I#w:  
           'ac，bd线段都要求 'ptD`)^(  
           k_ac = acy / acx 4hQ.RO   
           b_ac = p1y - k_ac * p1x th :I31  
           k_bd = bdy / bdx b '9L}q2m  
           b_bd = p2y - k_bd * p2x (7zdbJX  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) Gd%X> ~  
           p_y = k_ac * p_x + b_ac #E'aa'P}  
        End Select ^i;y2c  
      rt(1) = p_x Q:v9C ^7  
      rt(2) = p_y tMy<MO)Ei  
     \c1NIuJR  
'计算最大半径 bjq+x:>  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) J$+K't5BZ  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) U=Hx&g  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) f+c<|"we  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) !dcGBj  
Dim bb(5) As Single X:/Y^Xu
 
  bb(1) = rr1 0b3z(x!O  
  bb(2) = rr2 <
jjn'*44f  
  bb(3) = rr3 :nLhg$wMs  
  bb(4) = rr4 L_~vPp  
  nb = rr1 ^.Xom~  
For i = 1 To 4 9im<J'  
    If nb <= bb(i) Then <+r<3ZBA  
       nb = bb(i) cUDo}Yu  
    End If o$XJSz|6  
Next i Cg]Iz<<bE  
    rt(0) = Sqr(nb) sI,S(VWor  
    rr = rt() 
"d3qUk  
  End If lFZ}.  
         vR*TW  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ?mME^?x Mu  

]A%S&q  
有热压工艺方面的人才或者资料分享下； -rXo}I,VI  
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 !YZ$WiPl  

高手真多！

楼主威武霸气.