[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： lu;gmWz  
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关键点说几个： zQoJ8i>  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 2/ejU,S  
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 zqxN/H]z  
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 .p%V]Ka  

以下是几个重要的函数： b6g/SIae  
1.判断点在区域中函数 f{U,kCv  
2.计算夹角函数 ge#P(Itz  
3.转置函数 e}ivvs2  
4.得到区域中心点，及区域半径函数 GQ}R
xu]  
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） |WSmpuf  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 !J(6E:,b#  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single :@S=0|:j  
   cax = x2 - x1 ~>$z1o&}.  
   cay = y2 - y1 &Qt1~#1  
   cbx = x2 - x3 L08"8\  
   cby = y2 - y3 9`!#5i)VU8  
   mo_jj = cax * cbx + cay * cby Vu,:rPqI  
   mo_ca = Sqr(cax * cax + cay * cay) #-/_J?  
   mo_cb = Sqr(cbx * cbx + cby * cby) \b?O+;5Cj  
   cos_acb = mo_jj / (mo_ca * mo_cb) a KIS%M#Y  
   'ff_cos = cos_acb |`Be(  
   If cos_acb >= 1 Then S9 @*g3  
   nn = 0 #!4`t]E<  
   ElseIf cos_acb <= -1 Then e r"gPW  
   nn = 3.14159265258979 QY$4D;M`g6  
   Else 0p=  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) F2v9XMi  
   End If D1EHT
}  
   'ff_angle = nn :KsBJ>2ck  
   ff_angle = nn * 180 / 3.14159265258979 \8`^QgV`@  
End Function

'判断点在区域内函数 [bd?$qi  
Function point_in(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single, ppx As Single, ppy As Single) As Boolean nG"Ae8r  
Dim aob, boc, cod, doa, sum As Single PAu/iqCH  
  If ppx = p1x And ppy = p1y Then j{P3o<l&`  
     point_in = True /7C%m:  
     Exit Function EZ^M?awB4  
  End If bfA9aT  
  If ppx = p2x And ppy = p2y Then n7d`J_%s  
     point_in = True OoR0>!x Z  
     Exit Function 0WAOA6 _x  
  End If XU$\.g p-  
   If ppx = p3x And ppy = p3y Then IO?6F@(
 
     point_in = True 'deqF|Iox  
     Exit Function :#UN^"(m}  
  End If @m"P_1`*  
     r-o6I:y  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) [Kd"M[1[<  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) dH0wVI<z  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) el,n5OZ7  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) RQ[6svfP  
    sum = aob + boc + cod + doa ,YmTx  
    If 360.01 > sum And sum > 359.99 Then sg,9{R ^  
       point_in = True k!m9 l1x  
    Else H/O
v8|  
       point_in = False ^os|yRzV*M  
    End If ,T7(!)dR  
End Function

'得到点半径,得到交点坐标函数 4gK_'b6"  
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() xGymQ|y84  
    '求得中心点坐标 CT#N9  
Dim tt As String d<4q%y'X{  
Dim rt(3) As Single JZB@K6 ~dO  
    '判断是否平行 GFtE0IQ  
   acx = p3x - p1x 8p~G)J3U  
   acy = p3y - p1y QOY M/1U  
   bdx = p4x - p2x -pm^k-%v  
   bdy = p4y - p2y 4f> s2I&pQ  
   If acx * bdy = acy * bdx Then Tof H=d  
      rt(0) = 0 _ ?Z :m  
      Exit Function 4 g^oy^~  
   Else Ie8jBf -  
      '判断斜率存在否 mmrz:_  
      If p1x = p3x And p2x <> p4x Then Se %"C&  
         tt = "ac_n_bd_y" ?AJE*=b  
      ElseIf p1x <> p3x And p2x = p4x Then F^|4nBd*ub  
         tt = "ac_y_bd_n" au 5qbP  
      ElseIf p1x <> p3x And p2x <> p4x Then 6@o *"4~Q  
         tt = "ac_y_bd_y" iu6NIy7D  
      End If U49 `!~b7  
    Select Case tt \Lu] %}  
         Case "ac_n_bd_y" |#=4]]>m  
            'bd线段方程 " )_-L8  
            k_bd = bdy / bdx VVyms7 VN  
            b_bd = p2y - k_bd * p2x ,,[pc  
            p_x = p1x YE\s<$  
            p_y = k_bd * p_x + b_bd vL"[7'  
         Case "ac_y_bd_n" &%4*~;o  
            'ac线段方程 $'>h7].  
            k_ac = acy / acx vtVc^j4  
            b_ac = p1y - k_ac * p1x T.p:`}Ma  
            p_x = p2x N61\]BN<  
            p_y = k_ac * p_x + b_ac s
>^$: wzu  
        Case "ac_y_bd_y" byUst
m6y  
           'ac，bd线段都要求 CA{(x(W\:  
           k_ac = acy / acx ^w|apI~HSE  
           b_ac = p1y - k_ac * p1x 41V}6+$g  
           k_bd = bdy / bdx s5'So@L8  
           b_bd = p2y - k_bd * p2x Fxr$j\bm  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) #$[}JiuL/  
           p_y = k_ac * p_x + b_ac xK3}zN$T  
        End Select _YgvLz %  
      rt(1) = p_x E|fQbkfw  
      rt(2) = p_y 9xm'0 '  
     >AT T<U=  
'计算最大半径 Gv3AJ'NL  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 9c_h+XN?y  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) c={bunnz#  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) ^|1)6P}6  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ry%Fs&V*>  
Dim bb(5) As Single ZBAtRs  
  bb(1) = rr1 P@z,[,sy"$  
  bb(2) = rr2 y=)xo7(  
  bb(3) = rr3  1ZF>e`t8  
  bb(4) = rr4 e):rr*  
  nb = rr1 }}'0r2S  
For i = 1 To 4 mt(2HBNoz  
    If nb <= bb(i) Then qJZ5w}  
       nb = bb(i) )6 _+  
    End If T1Q c?5K^  
Next i M@/Hd0$  
    rt(0) = Sqr(nb) oG_-a(N  
    rr = rt() 3M[b)At V.  
  End If V=v7<I=]  
         JBKCa 3  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  w$X"E*~>8  

}-ly'4=l  
有热压工艺方面的人才或者资料分享下； BP&T|s  
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 XA&Vtgu  

高手真多！

楼主威武霸气.