[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： 9@ndiu[  
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关键点说几个： :g2  }C  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） W;zpt|kAH  
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 QXVC\@  
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 NvJV</l6A  

以下是几个重要的函数： KjYAdia:H  
1.判断点在区域中函数 Gb2L }  
2.计算夹角函数 5u$D/* Eb  
3.转置函数 oC*=JJe,  
4.得到区域中心点，及区域半径函数 h2~4G)J  
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） $*f?&U]k  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 Lrd[Ov  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single )Si2u5  
   cax = x2 - x1 =0qpVFvU  
   cay = y2 - y1 R>/NE!q  
   cbx = x2 - x3 (JUZCP/\  
   cby = y2 - y3 ZnW@YC#9  
   mo_jj = cax * cbx + cay * cby //f  
   mo_ca = Sqr(cax * cax + cay * cay) g}x(hF  
   mo_cb = Sqr(cbx * cbx + cby * cby) xSMt*]=9  
   cos_acb = mo_jj / (mo_ca * mo_cb) o}$1Ay*q`  
   'ff_cos = cos_acb "V&I^YSc>  
   If cos_acb >= 1 Then +B}0=Ex$t  
   nn = 0 }ns-W3B'  
   ElseIf cos_acb <= -1 Then ~P.I<  
   nn = 3.14159265258979 r;&>iX4B  
   Else T{+Z(L  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 5jB*fIz  
   End If fCWGAO2  
   'ff_angle = nn LR(-<"  
   ff_angle = nn * 180 / 3.14159265258979 ;30nd=  
End Function

'判断点在区域内函数 G<|8?6bq#  
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 cyyVg!+  
Dim aob, boc, cod, doa, sum As Single 4JGtI*%5lq  
  If ppx = p1x And ppy = p1y Then TS2ZF{m  
     point_in = True {X(:jAy  
     Exit Function \%]I{  
  End If o1cErI&q"  
  If ppx = p2x And ppy = p2y Then xG&)1sT#-\  
     point_in = True q@t0NvNSu  
     Exit Function ?W^c4NtP  
  End If L|P5=/d  
   If ppx = p3x And ppy = p3y Then #|&Sc_#4)  
     point_in = True :L44]K5FL  
     Exit Function fk1ASV<rN  
  End If (0YZZ93  
     eIRLNxt+v  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) (3J$>Na  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) z|EEVNFd&  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) ,(8;y=wux  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) tg]x0#@s  
    sum = aob + boc + cod + doa Bp8'pj;~  
    If 360.01 > sum And sum > 359.99 Then (q+)'H%iK  
       point_in = True n8*;lK8  
    Else u/cg|]x&T  
       point_in = False =  C4  
    End If <:SZAAoIV  
End Function

'得到点半径,得到交点坐标函数 oD<kMK  
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() G:~k.1y[  
    '求得中心点坐标 =c/wplv*  
Dim tt As String N[<\>Ps|u  
Dim rt(3) As Single D6>HN
[D"  
    '判断是否平行 $STaQ28C  
   acx = p3x - p1x { ^cV lC_  
   acy = p3y - p1y >-H{Z{VDd  
   bdx = p4x - p2x S H!  
   bdy = p4y - p2y ZosP(Tdq  
   If acx * bdy = acy * bdx Then G6T_O  
      rt(0) = 0 c-B cA  
      Exit Function $0vb
^  
   Else {q"OM*L(  
      '判断斜率存在否 E[/\7v\  
      If p1x = p3x And p2x <> p4x Then 0aG ni|  
         tt = "ac_n_bd_y" &*+'>UEe5  
      ElseIf p1x <> p3x And p2x = p4x Then &l!4mxwr`  
         tt = "ac_y_bd_n" 3AU;>D^5  
      ElseIf p1x <> p3x And p2x <> p4x Then _lamn}(x0  
         tt = "ac_y_bd_y" HZ'_r cv  
      End If _f$^%?^  
    Select Case tt <StN%2WQ1  
         Case "ac_n_bd_y" 19w*!FGX  
            'bd线段方程 r"P|dlV-  
            k_bd = bdy / bdx gIjh:_ Pz  
            b_bd = p2y - k_bd * p2x u6AA4(  
            p_x = p1x $<}$DH
_Y  
            p_y = k_bd * p_x + b_bd \WxukYH  
         Case "ac_y_bd_n" vEJWFoeEFm  
            'ac线段方程 ZrsBm_Rx  
            k_ac = acy / acx a{L d  
            b_ac = p1y - k_ac * p1x 3yVMXK  
            p_x = p2x #qK:J;Sn3  
            p_y = k_ac * p_x + b_ac G3Z)Z)N  
        Case "ac_y_bd_y" k?+?v?I =  
           'ac，bd线段都要求 <g"{Wv: h  
           k_ac = acy / acx e)d`pQ6  
           b_ac = p1y - k_ac * p1x sS*3=Yh  
           k_bd = bdy / bdx #d6)#:uss  
           b_bd = p2y - k_bd * p2x Gefne[  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) k$blEa4  
           p_y = k_ac * p_x + b_ac F(>Np2oi6  
        End Select ,U2*FZ["  
      rt(1) = p_x 8WXQOo8  
      rt(2) = p_y :tV*7S=)  
     a<^v(r  
'计算最大半径 t'n pG}`tE  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) JRB9rSN^  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) KVclhT<F  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) hgPa
6Kd  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) pR=@S>!|  
Dim bb(5) As Single qLD ?juas  
  bb(1) = rr1 IxY|>5z  
  bb(2) = rr2 uvkz'R=  
  bb(3) = rr3 T&6l$1J  
  bb(4) = rr4 H?yK~bGQ  
  nb = rr1 l9{hq/V  
For i = 1 To 4 CsGx@\jN  
    If nb <= bb(i) Then Hj^1or3R]  
       nb = bb(i) H\ F:95  
    End If Y]'Z7<U}*E  
Next i rNXQf'*I  
    rt(0) = Sqr(nb) +^60T$  
    rr = rt() !fE`4<|?  
  End If akp-zn&je  
         o#3ly-ht  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  d-oMQGOklb  

]vAz  
有热压工艺方面的人才或者资料分享下； bL0yuAwF2  
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 n8Qk=K  

高手真多！

楼主威武霸气.