[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： #_|b;cf  
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关键点说几个： ]O&TU X@)  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） f>Bcr9]]  
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 %# J8
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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 .:_dS=ut  

以下是几个重要的函数： ^'v6 ,*:4  
1.判断点在区域中函数 Q.M3rRh  
2.计算夹角函数 )p12SGR5  
3.转置函数 ^vsOlA(4  
4.得到区域中心点，及区域半径函数 AvP*p{w
e  
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） &&JI$x0;  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 )bw>)&)b`  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single sy/J+==  
   cax = x2 - x1 CcAsJX~_  
   cay = y2 - y1 Yg2z=&p-{"  
   cbx = x2 - x3 8q_3*++D  
   cby = y2 - y3 }[ux4cd8Y  
   mo_jj = cax * cbx + cay * cby wrGd40  
   mo_ca = Sqr(cax * cax + cay * cay) eQ9{J9)?  
   mo_cb = Sqr(cbx * cbx + cby * cby) $`_(%tl  
   cos_acb = mo_jj / (mo_ca * mo_cb) UkXc7D^jwm  
   'ff_cos = cos_acb y%ER51+  
   If cos_acb >= 1 Then t6-c{ZX>A  
   nn = 0 hO{@!H$l  
   ElseIf cos_acb <= -1 Then z-$?.?d  
   nn = 3.14159265258979 pMa 3R3a  
   Else gY*Cl1 Iz  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) Ldir'FW  
   End If e/@udau  
   'ff_angle = nn HzH_5kVW  
   ff_angle = nn * 180 / 3.14159265258979 sY1@ch"  
End Function

'判断点在区域内函数 yFJ(b%7  
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 jGt'S{  
Dim aob, boc, cod, doa, sum As Single 2(`2f  
  If ppx = p1x And ppy = p1y Then :MJBbrV ,  
     point_in = True e$F7wto  
     Exit Function {"{J*QH  
  End If WxO*{`T!  
  If ppx = p2x And ppy = p2y Then Z.<1,EKi=  
     point_in = True :VLuI  
     Exit Function 7M*+!al9  
  End If c%uhQ62  
   If ppx = p3x And ppy = p3y Then 66Hu<3X P  
     point_in = True :nZ*x=aq  
     Exit Function unD8h=Z2  
  End If mYt(`S*q  
     Y>%A*|U%  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) *'exvY~  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) X]y3~|K  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) ?>lmLz!e  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) |C-B=XE;3  
    sum = aob + boc + cod + doa eTrGFe!8w  
    If 360.01 > sum And sum > 359.99 Then *j<;;z-  
       point_in = True Z|wZyt$$  
    Else \N"K^kR4  
       point_in = False 4S"K%2'O  
    End If 3_Oq4/
 
End Function

'得到点半径,得到交点坐标函数 F1%' zsv  
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() NPS=?5p>  
    '求得中心点坐标 (<%i8xu2  
Dim tt As String @d4zSG/s5w  
Dim rt(3) As Single x!"!oJG^k  
    '判断是否平行 \uanQ|Nu  
   acx = p3x - p1x );Gt!]p`;  
   acy = p3y - p1y gB~SCl54  
   bdx = p4x - p2x fDbs3"H Q  
   bdy = p4y - p2y C<n.C*o  
   If acx * bdy = acy * bdx Then jq
=-Y  
      rt(0) = 0 fylaH(LER  
      Exit Function YnI   
   Else K5w22L^=+  
      '判断斜率存在否 $X\BO&  
      If p1x = p3x And p2x <> p4x Then =M(\
R8  
         tt = "ac_n_bd_y" _n{N3da  
      ElseIf p1x <> p3x And p2x = p4x Then xX"?3%y>  
         tt = "ac_y_bd_n" A#jiCIc  
      ElseIf p1x <> p3x And p2x <> p4x Then S2fw"1h*x  
         tt = "ac_y_bd_y" w"l8M0$m  
      End If *><] [|Y@H  
    Select Case tt
c~C :"g.y  
         Case "ac_n_bd_y" 3q1O:b^eo  
            'bd线段方程 W}.4$f>  
            k_bd = bdy / bdx T-5T`awf  
            b_bd = p2y - k_bd * p2x VUNQ@{ST|1  
            p_x = p1x %F}`;>C3  
            p_y = k_bd * p_x + b_bd q_oYI3  
         Case "ac_y_bd_n" y*7ht{B  
            'ac线段方程 Y[x ^59  
            k_ac = acy / acx |]m&LC  
            b_ac = p1y - k_ac * p1x <!w-op2@ir  
            p_x = p2x \XB71DUF  
            p_y = k_ac * p_x + b_ac ec]ksw6T+  
        Case "ac_y_bd_y"  |u$AzI  
           'ac，bd线段都要求 -rH3rKtf~  
           k_ac = acy / acx {yG)Ii  
           b_ac = p1y - k_ac * p1x &.4lhfI+(Q  
           k_bd = bdy / bdx mIr{Wocx  
           b_bd = p2y - k_bd * p2x <o]tW4\(R  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) q_ 5xsTlTR  
           p_y = k_ac * p_x + b_ac ZE=~ re  
        End Select @Qx;J<{+g  
      rt(1) = p_x \!YPht  
      rt(2) = p_y @Sv  ?Ar  
     K=B[MT#V{2  
'计算最大半径 U}qW9X;o  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 3cfkJ|fuwe  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) MRJdQCBV  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) Z-vzq;  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ]X-ZRmB`  
Dim bb(5) As Single -}N{'S,Bp  
  bb(1) = rr1 R=9j+74U  
  bb(2) = rr2 9#3+k/A  
  bb(3) = rr3 e3Lf'+G\  
  bb(4) = rr4 chiQ+  
  nb = rr1 pCC0:  
For i = 1 To 4 tSOF7N/<  
    If nb <= bb(i) Then }~ +  
       nb = bb(i) a}Ov@7  
    End If =)bZSb"<"  
Next i gVI*`$  
    rt(0) = Sqr(nb) Ri-I+7(n!  
    rr = rt() ga,yFw  
  End If TY88PXW  
         o86}NqK  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  !BY=HFT  

iFHVr'Og'  
有热压工艺方面的人才或者资料分享下； gr2zt&Z4  
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 % ,X(GwX  

高手真多！

楼主威武霸气.