[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： =4_}.  
B!'K20"gF  
8qe[x\,"8  

关键点说几个： #S7oW@  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） P& 1$SWNyW  
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 e'mF1al  
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 Xqf\}p n  

以下是几个重要的函数： A f`Kg-c_(  
1.判断点在区域中函数 I[E 6N2  
2.计算夹角函数 nWK8.&{.  
3.转置函数 *<\`"C;  
4.得到区域中心点，及区域半径函数 c|<F8n  
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） ~ZafTCa;  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 '6zZ`Ll9  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single %Za}q]?  
   cax = x2 - x1 ^mC~<pP(  
   cay = y2 - y1 wXQu%F3  
   cbx = x2 - x3
NFVu~t  
   cby = y2 - y3 2wpJ)t*PF  
   mo_jj = cax * cbx + cay * cby 2>jk@~Z1:u  
   mo_ca = Sqr(cax * cax + cay * cay) !$n@:W/  
   mo_cb = Sqr(cbx * cbx + cby * cby) F
KL4`GEm  
   cos_acb = mo_jj / (mo_ca * mo_cb) ]2u   
   'ff_cos = cos_acb <?A4/18K  
   If cos_acb >= 1 Then `GE8?UO-  
   nn = 0 pnu?=.O  
   ElseIf cos_acb <= -1 Then IWYQ67Yj   
   nn = 3.14159265258979 |}{gE=]  
   Else Sk EI51]  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) gI7*zR4D  
   End If ln_&Ux+l  
   'ff_angle = nn W$]qo|2P  
   ff_angle = nn * 180 / 3.14159265258979 v RD/67  
End Function

'判断点在区域内函数 << =cZ.HP  
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 wMk
Hx3XD  
Dim aob, boc, cod, doa, sum As Single KsGW@Ho:  
  If ppx = p1x And ppy = p1y Then sm"Rp~[i  
     point_in = True ,i6U*  
     Exit Function pcv\|)&}  
  End If ,$!F,
c  
  If ppx = p2x And ppy = p2y Then 7x.j:{2  
     point_in = True %V;*E]  
     Exit Function 4Kt0}W  
  End If H6Zo|n  
   If ppx = p3x And ppy = p3y Then "~ =O`5V  
     point_in = True ;a|%W4"  
     Exit Function K91O$'J  
  End If F&`%L#s|  
     j#3IF *"  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) -5v{p  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) Wlg1t~1=  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) }#tbK 2[  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) xjD$i'V+  
    sum = aob + boc + cod + doa '=G6$O2  
    If 360.01 > sum And sum > 359.99 Then j0"4X  
       point_in = True ^PC;fn,I  
    Else x [vbi  
       point_in = False kXdXyq  
    End If o5RvxGN  
End Function

'得到点半径,得到交点坐标函数 'k}w|gNB  
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() 'b"7Lzp2  
    '求得中心点坐标 ts@w9|  
Dim tt As String } PL{i  
Dim rt(3) As Single ]):>9q$C  
    '判断是否平行 [OPF3W3z  
   acx = p3x - p1x Ya~Th)'>q  
   acy = p3y - p1y OZz/ip-!lc  
   bdx = p4x - p2x GB Vqc!
d  
   bdy = p4y - p2y :3s^, g  
   If acx * bdy = acy * bdx Then Ik,N/[  
      rt(0) = 0 XxeP;}  
      Exit Function ~("bpS#ZgD  
   Else =oq=``%  
      '判断斜率存在否 PB*G#2W  
      If p1x = p3x And p2x <> p4x Then EqBTN07dZS  
         tt = "ac_n_bd_y" =/xx:D/  
      ElseIf p1x <> p3x And p2x = p4x Then  `wIWK7i  
         tt = "ac_y_bd_n" sSk qU  
      ElseIf p1x <> p3x And p2x <> p4x Then X]2x0  
         tt = "ac_y_bd_y" JoG(Nk
]  
      End If eV
X/<9>  
    Select Case tt #y"LFoJn  
         Case "ac_n_bd_y" GBBp1i  
            'bd线段方程 dEI!r1~n  
            k_bd = bdy / bdx YIIc@)  
            b_bd = p2y - k_bd * p2x TtWzjt  
            p_x = p1x 0dsL%G~/N  
            p_y = k_bd * p_x + b_bd `2\:b^h  
         Case "ac_y_bd_n" 6~>h;wC  
            'ac线段方程 hW~
UJ/$  
            k_ac = acy / acx 4\ElMb[]  
            b_ac = p1y - k_ac * p1x j%ZBAk)}  
            p_x = p2x ~
$//4kES  
            p_y = k_ac * p_x + b_ac ugj I$u  
        Case "ac_y_bd_y" Q t>|TGz  
           'ac，bd线段都要求 q-@&n6PEOZ  
           k_ac = acy / acx B7Zi|-F
  
           b_ac = p1y - k_ac * p1x 4$mtc*tzT  
           k_bd = bdy / bdx !?J-Y  
           b_bd = p2y - k_bd * p2x -2u)orWP  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) A@Zqh<,Ud  
           p_y = k_ac * p_x + b_ac 8df| 9E$  
        End Select b?!S$Sxz  
      rt(1) = p_x p/l">d]+  
      rt(2) = p_y "~zLG"  
     m;1/+qs0  
'计算最大半径 M$!-B,1BX  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) tnBCO%uG  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 7hLh}  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) >Y\?v-^~;  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ,h/l-#KS  
Dim bb(5) As Single sk:B;.z  
  bb(1) = rr1 O0_RW`69  
  bb(2) = rr2 PRBlf  
  bb(3) = rr3 P0sAq7"  
  bb(4) = rr4 48 0M|^  
  nb = rr1 /C<p^#g9.  
For i = 1 To 4 ZCBF&.!  
    If nb <= bb(i) Then @)!N{x?  
       nb = bb(i) jS8B:>  
    End If Q Wc^}#!!  
Next i %\
}5u[V  
    rt(0) = Sqr(nb) `PI*\t0  
    rr = rt() iweT@P`  
  End If i{:iRUC#  
         FJKlqM
5]  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  WU@_aw[  

TXf60{:f  
有热压工艺方面的人才或者资料分享下； ]:'

]  
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 [?qzMFb  

高手真多！

楼主威武霸气.