[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： rL=$WxdPU  
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关键点说几个： d
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1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） [H6>]&  
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 <Yc:,CU  
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 G\Me%{b#  

以下是几个重要的函数： S;])Nt'X'  
1.判断点在区域中函数 >HFJm&lQ  
2.计算夹角函数 Q%7EC>V  
3.转置函数 TDoYp  
4.得到区域中心点，及区域半径函数 R/#*~tPi8  
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） (\}IOCNS  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 %VMazlM
15  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single P ,i)A  
   cax = x2 - x1 nXN0~,+  
   cay = y2 - y1 Cdv TC`~,  
   cbx = x2 - x3 J.-#:OZ  
   cby = y2 - y3 3!,%;Vz=  
   mo_jj = cax * cbx + cay * cby ZD,l2DQ?  
   mo_ca = Sqr(cax * cax + cay * cay) "%Jx,L\f{  
   mo_cb = Sqr(cbx * cbx + cby * cby) t~AesHZpk  
   cos_acb = mo_jj / (mo_ca * mo_cb) 1)r1/0  
   'ff_cos = cos_acb IOA{lN6  
   If cos_acb >= 1 Then OD i)#  
   nn = 0 HV sIbQS  
   ElseIf cos_acb <= -1 Then h*d,AJz &.  
   nn = 3.14159265258979 Xm*Dh#H  
   Else WV8<gx`Q  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) r=9*2X#  
   End If 
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   'ff_angle = nn xH=&={  
   ff_angle = nn * 180 / 3.14159265258979 '.iUv#j4Sh  
End Function

'判断点在区域内函数 nhIITfJJ  
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 9Kqr9U--v  
Dim aob, boc, cod, doa, sum As Single RH`m=?~J,  
  If ppx = p1x And ppy = p1y Then 9@h>_1RJz  
     point_in = True 6G(k{S  
     Exit Function v9<p@GY"\  
  End If GJ*AyYG  
  If ppx = p2x And ppy = p2y Then pZH bj2~  
     point_in = True 3Mdg&~85  
     Exit Function 9u:MF0:W  
  End If (s9?#t6  
   If ppx = p3x And ppy = p3y Then )ow3Bl8w  
     point_in = True P$!Ht  
     Exit Function )N}xKw|  
  End If E J 9A 4B  
     r2
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    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) A1:Fe9q  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) t'z]<7  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) i}q6^;uTF  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) @50Js3R1q  
    sum = aob + boc + cod + doa =^{^KHzIl3  
    If 360.01 > sum And sum > 359.99 Then _ p?q/-[4  
       point_in = True E&97;VH  
    Else =U^B,q  
       point_in = False L\b$1U!i  
    End If >z(6ADq  
End Function

'得到点半径,得到交点坐标函数 FMR0?\jnT  
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() '2%hc\P6P  
    '求得中心点坐标 >Vn!kN6\  
Dim tt As String $+?6U  
Dim rt(3) As Single (US8Sc  
    '判断是否平行 EmLPq!C  
   acx = p3x - p1x a5&wS@) ;  
   acy = p3y - p1y SBYRN##n_  
   bdx = p4x - p2x u'=#~'6  
   bdy = p4y - p2y /a]+xL  
   If acx * bdy = acy * bdx Then @m(\f  
      rt(0) = 0 n:7=z0 s  
      Exit Function Ue8_Q8q5  
   Else fA|'}(kH  
      '判断斜率存在否 ,@<-h* m  
      If p1x = p3x And p2x <> p4x Then h>\}-|Ek  
         tt = "ac_n_bd_y" RRV&!<l@$  
      ElseIf p1x <> p3x And p2x = p4x Then U
;;Har  
         tt = "ac_y_bd_n" [t ^|l?  
      ElseIf p1x <> p3x And p2x <> p4x Then p4t(xm2T  
         tt = "ac_y_bd_y" S_\RQB\l  
      End If &qo'ge8p  
    Select Case tt (s}9N  
         Case "ac_n_bd_y" u0i @.  
            'bd线段方程 t[3Upe%  
            k_bd = bdy / bdx k5<lkC2z  
            b_bd = p2y - k_bd * p2x |px4a"  
            p_x = p1x R/P.m~?  
            p_y = k_bd * p_x + b_bd TN l$P~X>  
         Case "ac_y_bd_n" #{N#yReh  
            'ac线段方程 0`OqD d  
            k_ac = acy / acx ^ 41p+  
            b_ac = p1y - k_ac * p1x ^\x PF5  
            p_x = p2x -"(e*&TJ#  
            p_y = k_ac * p_x + b_ac B:9Z;g@&  
        Case "ac_y_bd_y" r"rEVx#1=  
           'ac，bd线段都要求
SLBKXj|  
           k_ac = acy / acx %S@XY3jZY  
           b_ac = p1y - k_ac * p1x {5*+  
           k_bd = bdy / bdx sX@e1*YE_  
           b_bd = p2y - k_bd * p2x gzw[^d  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) o6{XT.z5qx  
           p_y = k_ac * p_x + b_ac
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        End Select +K+ == mO&  
      rt(1) = p_x ib& |271gG  
      rt(2) = p_y SqEO ]~  
     :?lSa6de  
'计算最大半径 `7'(U)x,F  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) O  89BN6p  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) !hJ%{.  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) V1(eebi|  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) j8N
8|\n-  
Dim bb(5) As Single FSH6C2  
  bb(1) = rr1 J|3CG;+  
  bb(2) = rr2 23Eg|Xk  
  bb(3) = rr3 W+Iln`L  
  bb(4) = rr4 &(wik#S  
  nb = rr1  eYS  
For i = 1 To 4 LV9\  
    If nb <= bb(i) Then 783a Z8  
       nb = bb(i) ~PS%^zxyn  
    End If KxiZx I  
Next i 1OJ:Vy}n  
    rt(0) = Sqr(nb) t-/%|@?D  
    rr = rt() .o fYFK  
  End If A(<- U|  
         ujDAs%6MZ  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  U
{{RRK|  

-N*g|1rpa  
有热压工艺方面的人才或者资料分享下； 67Ge}6*2pd  
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 :P;#Y7}Y$  

高手真多！

楼主威武霸气.